mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-25 11:05:45 +00:00
cmd/k8s-operator,k8s-operator/sessionrecording,sessionrecording,ssh/tailssh: refactor session recording functionality (#12945)
cmd/k8s-operator,k8s-operator/sessionrecording,sessionrecording,ssh/tailssh: refactor session recording functionality Refactor SSH session recording functionality (mostly the bits related to Kubernetes API server proxy 'kubectl exec' session recording): - move the session recording bits used by both Tailscale SSH and the Kubernetes API server proxy into a shared sessionrecording package, to avoid having the operator to import ssh/tailssh - move the Kubernetes API server proxy session recording functionality into a k8s-operator/sessionrecording package, add some abstractions in preparation for adding support for a second streaming protocol (WebSockets) Updates tailscale/corp#19821 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
This commit is contained in:
Irbe Krumina
GitHub
parent
1bf7ed0348
commit
a21bf100f3
@ -5,7 +5,6 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
|
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W 💣 github.com/alexbrainman/sspi from github.com/alexbrainman/sspi/internal/common+
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W github.com/alexbrainman/sspi/internal/common from github.com/alexbrainman/sspi/negotiate
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W 💣 github.com/alexbrainman/sspi/negotiate from tailscale.com/net/tshttpproxy
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LD github.com/anmitsu/go-shlex from tailscale.com/tempfork/gliderlabs/ssh
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L github.com/aws/aws-sdk-go-v2/aws from github.com/aws/aws-sdk-go-v2/aws/defaults+
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L github.com/aws/aws-sdk-go-v2/aws/arn from tailscale.com/ipn/store/awsstore
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L github.com/aws/aws-sdk-go-v2/aws/defaults from github.com/aws/aws-sdk-go-v2/service/ssm+
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@ -82,7 +81,6 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
|
||||
github.com/bits-and-blooms/bitset from github.com/gaissmai/bart
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||||
💣 github.com/cespare/xxhash/v2 from github.com/prometheus/client_golang/prometheus
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L github.com/coreos/go-iptables/iptables from tailscale.com/util/linuxfw
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LD 💣 github.com/creack/pty from tailscale.com/ssh/tailssh
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💣 github.com/davecgh/go-spew/spew from k8s.io/apimachinery/pkg/util/dump
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W 💣 github.com/dblohm7/wingoes from github.com/dblohm7/wingoes/com+
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W 💣 github.com/dblohm7/wingoes/com from tailscale.com/util/osdiag+
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@ -113,7 +111,7 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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||||
github.com/go-openapi/jsonreference from k8s.io/kube-openapi/pkg/internal+
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github.com/go-openapi/jsonreference/internal from github.com/go-openapi/jsonreference
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github.com/go-openapi/swag from github.com/go-openapi/jsonpointer+
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L 💣 github.com/godbus/dbus/v5 from tailscale.com/net/dns+
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L 💣 github.com/godbus/dbus/v5 from tailscale.com/net/dns
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💣 github.com/gogo/protobuf/proto from k8s.io/api/admission/v1+
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github.com/gogo/protobuf/sortkeys from k8s.io/api/admission/v1+
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github.com/golang/groupcache/lru from k8s.io/client-go/tools/record+
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@ -161,7 +159,6 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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github.com/klauspost/compress/zstd from tailscale.com/util/zstdframe
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github.com/klauspost/compress/zstd/internal/xxhash from github.com/klauspost/compress/zstd
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github.com/kortschak/wol from tailscale.com/ipn/ipnlocal
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LD github.com/kr/fs from github.com/pkg/sftp
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github.com/mailru/easyjson/buffer from github.com/mailru/easyjson/jwriter
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💣 github.com/mailru/easyjson/jlexer from github.com/go-openapi/swag
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github.com/mailru/easyjson/jwriter from github.com/go-openapi/swag
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@ -183,8 +180,6 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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L github.com/pierrec/lz4/v4/internal/lz4stream from github.com/pierrec/lz4/v4
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L github.com/pierrec/lz4/v4/internal/xxh32 from github.com/pierrec/lz4/v4/internal/lz4stream
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github.com/pkg/errors from github.com/evanphx/json-patch/v5+
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LD github.com/pkg/sftp from tailscale.com/ssh/tailssh
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LD github.com/pkg/sftp/internal/encoding/ssh/filexfer from github.com/pkg/sftp
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D github.com/prometheus-community/pro-bing from tailscale.com/wgengine/netstack
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💣 github.com/prometheus/client_golang/prometheus from github.com/prometheus/client_golang/prometheus/collectors+
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github.com/prometheus/client_golang/prometheus/collectors from sigs.k8s.io/controller-runtime/pkg/internal/controller/metrics
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@ -207,7 +202,7 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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W github.com/tailscale/go-winio/pkg/guid from github.com/tailscale/go-winio+
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github.com/tailscale/golang-x-crypto/acme from tailscale.com/ipn/ipnlocal
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LD github.com/tailscale/golang-x-crypto/internal/poly1305 from github.com/tailscale/golang-x-crypto/ssh
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LD github.com/tailscale/golang-x-crypto/ssh from tailscale.com/ipn/ipnlocal+
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LD github.com/tailscale/golang-x-crypto/ssh from tailscale.com/ipn/ipnlocal
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LD github.com/tailscale/golang-x-crypto/ssh/internal/bcrypt_pbkdf from github.com/tailscale/golang-x-crypto/ssh
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github.com/tailscale/goupnp from github.com/tailscale/goupnp/dcps/internetgateway2+
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github.com/tailscale/goupnp/dcps/internetgateway2 from tailscale.com/net/portmapper
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@ -230,7 +225,6 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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github.com/tailscale/wireguard-go/tai64n from github.com/tailscale/wireguard-go/device
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💣 github.com/tailscale/wireguard-go/tun from github.com/tailscale/wireguard-go/device+
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github.com/tcnksm/go-httpstat from tailscale.com/net/netcheck
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LD github.com/u-root/u-root/pkg/termios from tailscale.com/ssh/tailssh
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L github.com/u-root/uio/rand from github.com/insomniacslk/dhcp/dhcpv4
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L github.com/u-root/uio/uio from github.com/insomniacslk/dhcp/dhcpv4+
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L 💣 github.com/vishvananda/netlink/nl from github.com/tailscale/netlink
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@ -660,7 +654,6 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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tailscale.com/client/web from tailscale.com/ipn/ipnlocal
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tailscale.com/clientupdate from tailscale.com/client/web+
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tailscale.com/clientupdate/distsign from tailscale.com/clientupdate
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LD tailscale.com/cmd/tailscaled/childproc from tailscale.com/ssh/tailssh
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tailscale.com/control/controlbase from tailscale.com/control/controlhttp+
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tailscale.com/control/controlclient from tailscale.com/ipn/ipnlocal+
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tailscale.com/control/controlhttp from tailscale.com/control/controlclient
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@ -692,6 +685,10 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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tailscale.com/k8s-operator from tailscale.com/cmd/k8s-operator
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tailscale.com/k8s-operator/apis from tailscale.com/k8s-operator/apis/v1alpha1
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tailscale.com/k8s-operator/apis/v1alpha1 from tailscale.com/cmd/k8s-operator+
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tailscale.com/k8s-operator/sessionrecording from tailscale.com/cmd/k8s-operator
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tailscale.com/k8s-operator/sessionrecording/conn from tailscale.com/k8s-operator/sessionrecording/spdy
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tailscale.com/k8s-operator/sessionrecording/spdy from tailscale.com/k8s-operator/sessionrecording
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tailscale.com/k8s-operator/sessionrecording/tsrecorder from tailscale.com/k8s-operator/sessionrecording+
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tailscale.com/kube from tailscale.com/cmd/k8s-operator+
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tailscale.com/licenses from tailscale.com/client/web
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tailscale.com/log/filelogger from tailscale.com/logpolicy
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@ -744,16 +741,15 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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tailscale.com/posture from tailscale.com/ipn/ipnlocal
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tailscale.com/proxymap from tailscale.com/tsd+
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💣 tailscale.com/safesocket from tailscale.com/client/tailscale+
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💣 tailscale.com/ssh/tailssh from tailscale.com/cmd/k8s-operator
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tailscale.com/sessionrecording from tailscale.com/cmd/k8s-operator+
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tailscale.com/syncs from tailscale.com/control/controlknobs+
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tailscale.com/tailcfg from tailscale.com/client/tailscale+
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tailscale.com/taildrop from tailscale.com/ipn/ipnlocal+
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LD tailscale.com/tempfork/gliderlabs/ssh from tailscale.com/ssh/tailssh
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tailscale.com/tempfork/heap from tailscale.com/wgengine/magicsock
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tailscale.com/tka from tailscale.com/client/tailscale+
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W tailscale.com/tsconst from tailscale.com/net/netmon+
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tailscale.com/tsd from tailscale.com/ipn/ipnlocal+
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tailscale.com/tsnet from tailscale.com/cmd/k8s-operator
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tailscale.com/tsnet from tailscale.com/cmd/k8s-operator+
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tailscale.com/tstime from tailscale.com/cmd/k8s-operator+
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tailscale.com/tstime/mono from tailscale.com/net/tstun+
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tailscale.com/tstime/rate from tailscale.com/derp+
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@ -838,7 +834,7 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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golang.org/x/crypto/argon2 from tailscale.com/tka
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golang.org/x/crypto/blake2b from golang.org/x/crypto/argon2+
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golang.org/x/crypto/blake2s from github.com/tailscale/wireguard-go/device+
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LD golang.org/x/crypto/blowfish from github.com/tailscale/golang-x-crypto/ssh/internal/bcrypt_pbkdf+
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LD golang.org/x/crypto/blowfish from github.com/tailscale/golang-x-crypto/ssh/internal/bcrypt_pbkdf
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golang.org/x/crypto/chacha20 from github.com/tailscale/golang-x-crypto/ssh+
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golang.org/x/crypto/chacha20poly1305 from crypto/tls+
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golang.org/x/crypto/cryptobyte from crypto/ecdsa+
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@ -849,7 +845,6 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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golang.org/x/crypto/nacl/secretbox from golang.org/x/crypto/nacl/box
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golang.org/x/crypto/poly1305 from github.com/tailscale/wireguard-go/device+
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golang.org/x/crypto/salsa20/salsa from golang.org/x/crypto/nacl/box+
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LD golang.org/x/crypto/ssh from github.com/pkg/sftp+
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golang.org/x/exp/constraints from github.com/dblohm7/wingoes/pe+
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golang.org/x/exp/maps from sigs.k8s.io/controller-runtime/pkg/cache+
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golang.org/x/exp/slices from tailscale.com/cmd/k8s-operator+
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@ -954,7 +949,6 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
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log/internal from log+
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log/slog from github.com/go-logr/logr+
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log/slog/internal from log/slog
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LD log/syslog from tailscale.com/ssh/tailssh
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maps from sigs.k8s.io/controller-runtime/pkg/predicate+
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math from archive/tar+
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math/big from crypto/dsa+
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@ -22,8 +22,9 @@
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"k8s.io/client-go/transport"
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"tailscale.com/client/tailscale"
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"tailscale.com/client/tailscale/apitype"
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kubesessionrecording "tailscale.com/k8s-operator/sessionrecording"
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tskube "tailscale.com/kube"
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"tailscale.com/ssh/tailssh"
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"tailscale.com/sessionrecording"
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"tailscale.com/tailcfg"
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"tailscale.com/tsnet"
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"tailscale.com/util/clientmetric"
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@ -36,12 +37,6 @@
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var (
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// counterNumRequestsproxies counts the number of API server requests proxied via this proxy.
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counterNumRequestsProxied = clientmetric.NewCounter("k8s_auth_proxy_requests_proxied")
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// counterSessionRecordingsAttempted counts the number of session recording attempts.
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counterSessionRecordingsAttempted = clientmetric.NewCounter("k8s_auth_proxy__session_recordings_attempted")
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// counterSessionRecordingsUploaded counts the number of successfully uploaded session recordings.
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counterSessionRecordingsUploaded = clientmetric.NewCounter("k8s_auth_proxy_session_recordings_uploaded")
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)
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type apiServerProxyMode int
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@ -232,7 +227,7 @@ func (ap *apiserverProxy) serveExec(w http.ResponseWriter, r *http.Request) {
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ap.rp.ServeHTTP(w, r.WithContext(whoIsKey.WithValue(r.Context(), who)))
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return
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}
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counterSessionRecordingsAttempted.Add(1) // at this point we know that users intended for this session to be recorded
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kubesessionrecording.CounterSessionRecordingsAttempted.Add(1) // at this point we know that users intended for this session to be recorded
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if !failOpen && len(addrs) == 0 {
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msg := "forbidden: 'kubectl exec' session must be recorded, but no recorders are available."
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ap.log.Error(msg)
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@ -252,18 +247,7 @@ func (ap *apiserverProxy) serveExec(w http.ResponseWriter, r *http.Request) {
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http.Error(w, msg, http.StatusForbidden)
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return
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}
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spdyH := &spdyHijacker{
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ts: ap.ts,
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req: r,
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who: who,
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ResponseWriter: w,
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log: ap.log,
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pod: r.PathValue("pod"),
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ns: r.PathValue("namespace"),
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addrs: addrs,
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failOpen: failOpen,
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connectToRecorder: tailssh.ConnectToRecorder,
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}
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spdyH := kubesessionrecording.New(ap.ts, r, who, w, r.PathValue("pod"), r.PathValue("namespace"), kubesessionrecording.SPDYProtocol, addrs, failOpen, sessionrecording.ConnectToRecorder, ap.log)
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ap.rp.ServeHTTP(spdyH, r.WithContext(whoIsKey.WithValue(r.Context(), who)))
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}
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@ -330,6 +330,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
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tailscale.com/posture from tailscale.com/ipn/ipnlocal
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tailscale.com/proxymap from tailscale.com/tsd+
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💣 tailscale.com/safesocket from tailscale.com/client/tailscale+
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LD tailscale.com/sessionrecording from tailscale.com/ssh/tailssh
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LD 💣 tailscale.com/ssh/tailssh from tailscale.com/cmd/tailscaled
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tailscale.com/syncs from tailscale.com/cmd/tailscaled+
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tailscale.com/tailcfg from tailscale.com/client/tailscale+
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20
k8s-operator/sessionrecording/conn/conn.go
Normal file
20
k8s-operator/sessionrecording/conn/conn.go
Normal file
@ -0,0 +1,20 @@
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !plan9
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// Package conn contains shared interface for the hijacked
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// connection of a 'kubectl exec' session that is being recorded.
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package conn
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import "net"
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type Conn interface {
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net.Conn
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// Fail can be called to set connection state to failed. By default any
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// bytes left over in write buffer are forwarded to the intended
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// destination when the connection is being closed except for when the
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// connection state is failed- so set the state to failed when erroring
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// out and failure policy is to fail closed.
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Fail()
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}
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118
k8s-operator/sessionrecording/fakes/fakes.go
Normal file
118
k8s-operator/sessionrecording/fakes/fakes.go
Normal file
@ -0,0 +1,118 @@
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !plan9
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// Package fakes contains mocks used for testing 'kubectl exec' session
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// recording functionality.
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package fakes
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import (
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"bytes"
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"encoding/json"
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"net"
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"sync"
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"testing"
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"tailscale.com/sessionrecording"
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"tailscale.com/tstime"
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)
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func New(conn net.Conn, wb bytes.Buffer, rb bytes.Buffer, closed bool) net.Conn {
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return &TestConn{
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Conn: conn,
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writeBuf: wb,
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readBuf: rb,
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closed: closed,
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}
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}
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type TestConn struct {
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net.Conn
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// writeBuf contains whatever was send to the conn via Write.
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writeBuf bytes.Buffer
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// readBuf contains whatever was sent to the conn via Read.
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readBuf bytes.Buffer
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sync.RWMutex // protects the following
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closed bool
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}
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var _ net.Conn = &TestConn{}
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func (tc *TestConn) Read(b []byte) (int, error) {
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return tc.readBuf.Read(b)
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}
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func (tc *TestConn) Write(b []byte) (int, error) {
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||||
return tc.writeBuf.Write(b)
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}
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||||
|
||||
func (tc *TestConn) Close() error {
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||||
tc.Lock()
|
||||
defer tc.Unlock()
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tc.closed = true
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return nil
|
||||
}
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||||
|
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func (tc *TestConn) IsClosed() bool {
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tc.Lock()
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defer tc.Unlock()
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return tc.closed
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||||
}
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||||
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func (tc *TestConn) WriteBufBytes() []byte {
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return tc.writeBuf.Bytes()
|
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}
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func (tc *TestConn) ResetReadBuf() {
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tc.readBuf.Reset()
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||||
}
|
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|
||||
func (tc *TestConn) WriteReadBufBytes(b []byte) error {
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_, err := tc.readBuf.Write(b)
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return err
|
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}
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type TestSessionRecorder struct {
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// buf holds data that was sent to the session recorder.
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buf bytes.Buffer
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}
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func (t *TestSessionRecorder) Write(b []byte) (int, error) {
|
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return t.buf.Write(b)
|
||||
}
|
||||
|
||||
func (t *TestSessionRecorder) Close() error {
|
||||
t.buf.Reset()
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||||
return nil
|
||||
}
|
||||
|
||||
func (t *TestSessionRecorder) Bytes() []byte {
|
||||
return t.buf.Bytes()
|
||||
}
|
||||
|
||||
func CastLine(t *testing.T, p []byte, clock tstime.Clock) []byte {
|
||||
t.Helper()
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||||
j, err := json.Marshal([]any{
|
||||
clock.Now().Sub(clock.Now()).Seconds(),
|
||||
"o",
|
||||
string(p),
|
||||
})
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||||
if err != nil {
|
||||
t.Fatalf("error marshalling cast line: %v", err)
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||||
}
|
||||
return append(j, '\n')
|
||||
}
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||||
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||||
func AsciinemaResizeMsg(t *testing.T, width, height int) []byte {
|
||||
t.Helper()
|
||||
ch := sessionrecording.CastHeader{
|
||||
Width: width,
|
||||
Height: height,
|
||||
}
|
||||
bs, err := json.Marshal(ch)
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||||
if err != nil {
|
||||
t.Fatalf("error marshalling CastHeader: %v", err)
|
||||
}
|
||||
return append(bs, '\n')
|
||||
}
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||||
@ -3,7 +3,9 @@
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||||
|
||||
//go:build !plan9
|
||||
|
||||
package main
|
||||
// Package sessionrecording contains functionality for recording Kubernetes API
|
||||
// server proxy 'kubectl exec' sessions.
|
||||
package sessionrecording
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
@ -19,17 +21,51 @@
|
||||
"github.com/pkg/errors"
|
||||
"go.uber.org/zap"
|
||||
"tailscale.com/client/tailscale/apitype"
|
||||
"tailscale.com/k8s-operator/sessionrecording/spdy"
|
||||
"tailscale.com/k8s-operator/sessionrecording/tsrecorder"
|
||||
"tailscale.com/sessionrecording"
|
||||
"tailscale.com/tailcfg"
|
||||
"tailscale.com/tsnet"
|
||||
"tailscale.com/tstime"
|
||||
"tailscale.com/util/clientmetric"
|
||||
"tailscale.com/util/multierr"
|
||||
)
|
||||
|
||||
// spdyHijacker implements [net/http.Hijacker] interface.
|
||||
const SPDYProtocol protocol = "SPDY"
|
||||
|
||||
// protocol is the streaming protocol of the hijacked session. Supported
|
||||
// protocols are SPDY.
|
||||
type protocol string
|
||||
|
||||
var (
|
||||
// CounterSessionRecordingsAttempted counts the number of session recording attempts.
|
||||
CounterSessionRecordingsAttempted = clientmetric.NewCounter("k8s_auth_proxy_session_recordings_attempted")
|
||||
|
||||
// counterSessionRecordingsUploaded counts the number of successfully uploaded session recordings.
|
||||
counterSessionRecordingsUploaded = clientmetric.NewCounter("k8s_auth_proxy_session_recordings_uploaded")
|
||||
)
|
||||
|
||||
func New(ts *tsnet.Server, req *http.Request, who *apitype.WhoIsResponse, w http.ResponseWriter, pod, ns string, proto protocol, addrs []netip.AddrPort, failOpen bool, connFunc RecorderDialFn, log *zap.SugaredLogger) *Hijacker {
|
||||
return &Hijacker{
|
||||
ts: ts,
|
||||
req: req,
|
||||
who: who,
|
||||
ResponseWriter: w,
|
||||
pod: pod,
|
||||
ns: ns,
|
||||
addrs: addrs,
|
||||
failOpen: failOpen,
|
||||
connectToRecorder: connFunc,
|
||||
proto: proto,
|
||||
log: log,
|
||||
}
|
||||
}
|
||||
|
||||
// Hijacker implements [net/http.Hijacker] interface.
|
||||
// It must be configured with an http request for a 'kubectl exec' session that
|
||||
// needs to be recorded. It knows how to hijack the connection and configure for
|
||||
// the session contents to be sent to a tsrecorder instance.
|
||||
type spdyHijacker struct {
|
||||
type Hijacker struct {
|
||||
http.ResponseWriter
|
||||
ts *tsnet.Server
|
||||
req *http.Request
|
||||
@ -40,6 +76,7 @@ type spdyHijacker struct {
|
||||
addrs []netip.AddrPort // tsrecorder addresses
|
||||
failOpen bool // whether to fail open if recording fails
|
||||
connectToRecorder RecorderDialFn
|
||||
proto protocol // streaming protocol
|
||||
}
|
||||
|
||||
// RecorderDialFn dials the specified netip.AddrPorts that should be tsrecorder
|
||||
@ -51,7 +88,7 @@ type spdyHijacker struct {
|
||||
|
||||
// Hijack hijacks a 'kubectl exec' session and configures for the session
|
||||
// contents to be sent to a recorder.
|
||||
func (h *spdyHijacker) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
||||
func (h *Hijacker) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
||||
h.log.Infof("recorder addrs: %v, failOpen: %v", h.addrs, h.failOpen)
|
||||
reqConn, brw, err := h.ResponseWriter.(http.Hijacker).Hijack()
|
||||
if err != nil {
|
||||
@ -69,7 +106,7 @@ func (h *spdyHijacker) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
||||
// spdyHijacker.addrs. Returns conn from provided opts, wrapped in recording
|
||||
// logic. If connecting to the recorder fails or an error is received during the
|
||||
// session and spdyHijacker.failOpen is false, connection will be closed.
|
||||
func (h *spdyHijacker) setUpRecording(ctx context.Context, conn net.Conn) (net.Conn, error) {
|
||||
func (h *Hijacker) setUpRecording(ctx context.Context, conn net.Conn) (net.Conn, error) {
|
||||
const (
|
||||
// https://docs.asciinema.org/manual/asciicast/v2/
|
||||
asciicastv2 = 2
|
||||
@ -96,25 +133,15 @@ func (h *spdyHijacker) setUpRecording(ctx context.Context, conn net.Conn) (net.C
|
||||
h.log.Info("successfully connected to a session recorder")
|
||||
wc = rw
|
||||
cl := tstime.DefaultClock{}
|
||||
lc := &spdyRemoteConnRecorder{
|
||||
log: h.log,
|
||||
Conn: conn,
|
||||
rec: &recorder{
|
||||
start: cl.Now(),
|
||||
clock: cl,
|
||||
failOpen: h.failOpen,
|
||||
conn: wc,
|
||||
},
|
||||
}
|
||||
|
||||
rec := tsrecorder.New(wc, cl, cl.Now(), h.failOpen)
|
||||
qp := h.req.URL.Query()
|
||||
ch := CastHeader{
|
||||
ch := sessionrecording.CastHeader{
|
||||
Version: asciicastv2,
|
||||
Timestamp: lc.rec.start.Unix(),
|
||||
Timestamp: cl.Now().Unix(),
|
||||
Command: strings.Join(qp["command"], " "),
|
||||
SrcNode: strings.TrimSuffix(h.who.Node.Name, "."),
|
||||
SrcNodeID: h.who.Node.StableID,
|
||||
Kubernetes: &Kubernetes{
|
||||
Kubernetes: &sessionrecording.Kubernetes{
|
||||
PodName: h.pod,
|
||||
Namespace: h.ns,
|
||||
Container: strings.Join(qp["container"], " "),
|
||||
@ -126,7 +153,7 @@ func (h *spdyHijacker) setUpRecording(ctx context.Context, conn net.Conn) (net.C
|
||||
} else {
|
||||
ch.SrcNodeTags = h.who.Node.Tags
|
||||
}
|
||||
lc.ch = ch
|
||||
lc := spdy.New(conn, rec, ch, h.log)
|
||||
go func() {
|
||||
var err error
|
||||
select {
|
||||
@ -147,7 +174,7 @@ func (h *spdyHijacker) setUpRecording(ctx context.Context, conn net.Conn) (net.C
|
||||
}
|
||||
msg += "; failure mode set to 'fail closed'; closing connection"
|
||||
h.log.Error(msg)
|
||||
lc.failed = true
|
||||
lc.Fail()
|
||||
// TODO (irbekrm): write a message to the client
|
||||
if err := lc.Close(); err != nil {
|
||||
h.log.Infof("error closing recorder connections: %v", err)
|
||||
@ -157,52 +184,6 @@ func (h *spdyHijacker) setUpRecording(ctx context.Context, conn net.Conn) (net.C
|
||||
return lc, nil
|
||||
}
|
||||
|
||||
// CastHeader is the asciicast header to be sent to the recorder at the start of
|
||||
// the recording of a session.
|
||||
// https://docs.asciinema.org/manual/asciicast/v2/#header
|
||||
type CastHeader struct {
|
||||
// Version is the asciinema file format version.
|
||||
Version int `json:"version"`
|
||||
|
||||
// Width is the terminal width in characters.
|
||||
Width int `json:"width"`
|
||||
|
||||
// Height is the terminal height in characters.
|
||||
Height int `json:"height"`
|
||||
|
||||
// Timestamp is the unix timestamp of when the recording started.
|
||||
Timestamp int64 `json:"timestamp"`
|
||||
|
||||
// Tailscale-specific fields: SrcNode is the full MagicDNS name of the
|
||||
// tailnet node originating the connection, without the trailing dot.
|
||||
SrcNode string `json:"srcNode"`
|
||||
|
||||
// SrcNodeID is the node ID of the tailnet node originating the connection.
|
||||
SrcNodeID tailcfg.StableNodeID `json:"srcNodeID"`
|
||||
|
||||
// SrcNodeTags is the list of tags on the node originating the connection (if any).
|
||||
SrcNodeTags []string `json:"srcNodeTags,omitempty"`
|
||||
|
||||
// SrcNodeUserID is the user ID of the node originating the connection (if not tagged).
|
||||
SrcNodeUserID tailcfg.UserID `json:"srcNodeUserID,omitempty"` // if not tagged
|
||||
|
||||
// SrcNodeUser is the LoginName of the node originating the connection (if not tagged).
|
||||
SrcNodeUser string `json:"srcNodeUser,omitempty"`
|
||||
|
||||
Command string
|
||||
|
||||
// Kubernetes-specific fields:
|
||||
Kubernetes *Kubernetes `json:"kubernetes,omitempty"`
|
||||
}
|
||||
|
||||
// Kubernetes contains 'kubectl exec' session specific information for
|
||||
// tsrecorder.
|
||||
type Kubernetes struct {
|
||||
PodName string
|
||||
Namespace string
|
||||
Container string
|
||||
}
|
||||
|
||||
func closeConnWithWarning(conn net.Conn, msg string) error {
|
||||
b := io.NopCloser(bytes.NewBuffer([]byte(msg)))
|
||||
resp := http.Response{Status: http.StatusText(http.StatusForbidden), StatusCode: http.StatusForbidden, Body: b}
|
||||
@ -3,7 +3,7 @@
|
||||
|
||||
//go:build !plan9
|
||||
|
||||
package main
|
||||
package sessionrecording
|
||||
|
||||
import (
|
||||
"context"
|
||||
@ -19,12 +19,13 @@
|
||||
|
||||
"go.uber.org/zap"
|
||||
"tailscale.com/client/tailscale/apitype"
|
||||
"tailscale.com/k8s-operator/sessionrecording/fakes"
|
||||
"tailscale.com/tailcfg"
|
||||
"tailscale.com/tsnet"
|
||||
"tailscale.com/tstest"
|
||||
)
|
||||
|
||||
func Test_SPDYHijacker(t *testing.T) {
|
||||
func Test_Hijacker(t *testing.T) {
|
||||
zl, err := zap.NewDevelopment()
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
@ -64,9 +65,9 @@ func Test_SPDYHijacker(t *testing.T) {
|
||||
}
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
tc := &testConn{}
|
||||
tc := &fakes.TestConn{}
|
||||
ch := make(chan error)
|
||||
h := &spdyHijacker{
|
||||
h := &Hijacker{
|
||||
connectToRecorder: func(context.Context, []netip.AddrPort, func(context.Context, string, string) (net.Conn, error)) (wc io.WriteCloser, rec []*tailcfg.SSHRecordingAttempt, _ <-chan error, err error) {
|
||||
if tt.failRecorderConnect {
|
||||
err = errors.New("test")
|
||||
@ -98,8 +99,8 @@ func Test_SPDYHijacker(t *testing.T) {
|
||||
// (test that connection remains open over some period
|
||||
// of time).
|
||||
if err := tstest.WaitFor(timeout, func() (err error) {
|
||||
if tt.wantsConnClosed != tc.isClosed() {
|
||||
return fmt.Errorf("got connection state: %t, wants connection state: %t", tc.isClosed(), tt.wantsConnClosed)
|
||||
if tt.wantsConnClosed != tc.IsClosed() {
|
||||
return fmt.Errorf("got connection state: %t, wants connection state: %t", tc.IsClosed(), tt.wantsConnClosed)
|
||||
}
|
||||
return nil
|
||||
}); err != nil {
|
||||
@ -3,7 +3,9 @@
|
||||
|
||||
//go:build !plan9
|
||||
|
||||
package main
|
||||
// Package spdy contains functionality for parsing SPDY streaming sessions. This
|
||||
// is used for 'kubectl exec' session recording.
|
||||
package spdy
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
@ -17,16 +19,29 @@
|
||||
|
||||
"go.uber.org/zap"
|
||||
corev1 "k8s.io/api/core/v1"
|
||||
srconn "tailscale.com/k8s-operator/sessionrecording/conn"
|
||||
"tailscale.com/k8s-operator/sessionrecording/tsrecorder"
|
||||
"tailscale.com/sessionrecording"
|
||||
)
|
||||
|
||||
// spdyRemoteConnRecorder is a wrapper around net.Conn. It reads the bytestream
|
||||
// for a 'kubectl exec' session, sends session recording data to the configured
|
||||
// recorder and forwards the raw bytes to the original destination.
|
||||
type spdyRemoteConnRecorder struct {
|
||||
func New(nc net.Conn, rec *tsrecorder.Client, ch sessionrecording.CastHeader, log *zap.SugaredLogger) srconn.Conn {
|
||||
return &conn{
|
||||
Conn: nc,
|
||||
rec: rec,
|
||||
ch: ch,
|
||||
log: log,
|
||||
}
|
||||
}
|
||||
|
||||
// conn is a wrapper around net.Conn. It reads the bytestream for a 'kubectl
|
||||
// exec' session streamed using SPDY protocol, sends session recording data to
|
||||
// the configured recorder and forwards the raw bytes to the original
|
||||
// destination.
|
||||
type conn struct {
|
||||
net.Conn
|
||||
// rec knows how to send data written to it to a tsrecorder instance.
|
||||
rec *recorder
|
||||
ch CastHeader
|
||||
rec *tsrecorder.Client
|
||||
ch sessionrecording.CastHeader
|
||||
|
||||
stdoutStreamID atomic.Uint32
|
||||
stderrStreamID atomic.Uint32
|
||||
@ -53,7 +68,7 @@ type spdyRemoteConnRecorder struct {
|
||||
// If the frame is a data frame for resize stream, sends resize message to the
|
||||
// recorder. If the frame is a SYN_STREAM control frame that starts stdout,
|
||||
// stderr or resize stream, store the stream ID.
|
||||
func (c *spdyRemoteConnRecorder) Read(b []byte) (int, error) {
|
||||
func (c *conn) Read(b []byte) (int, error) {
|
||||
c.rmu.Lock()
|
||||
defer c.rmu.Unlock()
|
||||
n, err := c.Conn.Read(b)
|
||||
@ -103,7 +118,7 @@ func (c *spdyRemoteConnRecorder) Read(b []byte) (int, error) {
|
||||
// Write forwards the raw data of the latest parsed SPDY frame to the original
|
||||
// destination. If the frame is an SPDY data frame, it also sends the payload to
|
||||
// the connected session recorder.
|
||||
func (c *spdyRemoteConnRecorder) Write(b []byte) (int, error) {
|
||||
func (c *conn) Write(b []byte) (int, error) {
|
||||
c.wmu.Lock()
|
||||
defer c.wmu.Unlock()
|
||||
c.writeBuf.Write(b)
|
||||
@ -133,7 +148,7 @@ func (c *spdyRemoteConnRecorder) Write(b []byte) (int, error) {
|
||||
return
|
||||
}
|
||||
j = append(j, '\n')
|
||||
err = c.rec.writeCastLine(j)
|
||||
err = c.rec.WriteCastLine(j)
|
||||
if err != nil {
|
||||
c.log.Errorf("received error from recorder: %v", err)
|
||||
}
|
||||
@ -151,7 +166,7 @@ func (c *spdyRemoteConnRecorder) Write(b []byte) (int, error) {
|
||||
return len(b), err
|
||||
}
|
||||
|
||||
func (c *spdyRemoteConnRecorder) Close() error {
|
||||
func (c *conn) Close() error {
|
||||
c.wmu.Lock()
|
||||
defer c.wmu.Unlock()
|
||||
if c.closed {
|
||||
@ -167,13 +182,19 @@ func (c *spdyRemoteConnRecorder) Close() error {
|
||||
return err
|
||||
}
|
||||
|
||||
// parseSynStream parses SYN_STREAM SPDY control frame and updates
|
||||
func (s *conn) Fail() {
|
||||
s.wmu.Lock()
|
||||
s.failed = true
|
||||
s.wmu.Unlock()
|
||||
}
|
||||
|
||||
// storeStreamID parses SYN_STREAM SPDY control frame and updates
|
||||
// spdyRemoteConnRecorder to store the newly created stream's ID if it is one of
|
||||
// the stream types we care about. Storing stream_id:stream_type mapping allows
|
||||
// us to parse received data frames (that have stream IDs) differently depening
|
||||
// on which stream they belong to (i.e send data frame payload for stdout stream
|
||||
// to session recorder).
|
||||
func (c *spdyRemoteConnRecorder) storeStreamID(sf spdyFrame, header http.Header) {
|
||||
func (c *conn) storeStreamID(sf spdyFrame, header http.Header) {
|
||||
const (
|
||||
streamTypeHeaderKey = "Streamtype"
|
||||
)
|
||||
@ -3,19 +3,18 @@
|
||||
|
||||
//go:build !plan9
|
||||
|
||||
package main
|
||||
package spdy
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/json"
|
||||
"net"
|
||||
"reflect"
|
||||
"sync"
|
||||
"testing"
|
||||
|
||||
"go.uber.org/zap"
|
||||
"tailscale.com/k8s-operator/sessionrecording/fakes"
|
||||
"tailscale.com/k8s-operator/sessionrecording/tsrecorder"
|
||||
"tailscale.com/sessionrecording"
|
||||
"tailscale.com/tstest"
|
||||
"tailscale.com/tstime"
|
||||
)
|
||||
|
||||
// Test_Writes tests that 1 or more Write calls to spdyRemoteConnRecorder
|
||||
@ -56,13 +55,13 @@ func Test_Writes(t *testing.T) {
|
||||
name: "single_write_stdout_data_frame_with_payload",
|
||||
inputs: [][]byte{{0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x5, 0x1, 0x2, 0x3, 0x4, 0x5}},
|
||||
wantForwarded: []byte{0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x5, 0x1, 0x2, 0x3, 0x4, 0x5},
|
||||
wantRecorded: castLine(t, []byte{0x1, 0x2, 0x3, 0x4, 0x5}, cl),
|
||||
wantRecorded: fakes.CastLine(t, []byte{0x1, 0x2, 0x3, 0x4, 0x5}, cl),
|
||||
},
|
||||
{
|
||||
name: "single_write_stderr_data_frame_with_payload",
|
||||
inputs: [][]byte{{0x0, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0, 0x5, 0x1, 0x2, 0x3, 0x4, 0x5}},
|
||||
wantForwarded: []byte{0x0, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0, 0x5, 0x1, 0x2, 0x3, 0x4, 0x5},
|
||||
wantRecorded: castLine(t, []byte{0x1, 0x2, 0x3, 0x4, 0x5}, cl),
|
||||
wantRecorded: fakes.CastLine(t, []byte{0x1, 0x2, 0x3, 0x4, 0x5}, cl),
|
||||
},
|
||||
{
|
||||
name: "single_data_frame_unknow_stream_with_payload",
|
||||
@ -73,13 +72,13 @@ func Test_Writes(t *testing.T) {
|
||||
name: "control_frame_and_data_frame_split_across_two_writes",
|
||||
inputs: [][]byte{{0x80, 0x3, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1}, {0x0, 0x0, 0x0, 0x5, 0x1, 0x2, 0x3, 0x4, 0x5}},
|
||||
wantForwarded: []byte{0x80, 0x3, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x5, 0x1, 0x2, 0x3, 0x4, 0x5},
|
||||
wantRecorded: castLine(t, []byte{0x1, 0x2, 0x3, 0x4, 0x5}, cl),
|
||||
wantRecorded: fakes.CastLine(t, []byte{0x1, 0x2, 0x3, 0x4, 0x5}, cl),
|
||||
},
|
||||
{
|
||||
name: "single_first_write_stdout_data_frame_with_payload",
|
||||
inputs: [][]byte{{0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x5, 0x1, 0x2, 0x3, 0x4, 0x5}},
|
||||
wantForwarded: []byte{0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x5, 0x1, 0x2, 0x3, 0x4, 0x5},
|
||||
wantRecorded: append(asciinemaResizeMsg(t, 10, 20), castLine(t, []byte{0x1, 0x2, 0x3, 0x4, 0x5}, cl)...),
|
||||
wantRecorded: append(fakes.AsciinemaResizeMsg(t, 10, 20), fakes.CastLine(t, []byte{0x1, 0x2, 0x3, 0x4, 0x5}, cl)...),
|
||||
width: 10,
|
||||
height: 20,
|
||||
firstWrite: true,
|
||||
@ -87,19 +86,15 @@ func Test_Writes(t *testing.T) {
|
||||
}
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
tc := &testConn{}
|
||||
sr := &testSessionRecorder{}
|
||||
rec := &recorder{
|
||||
conn: sr,
|
||||
clock: cl,
|
||||
start: cl.Now(),
|
||||
}
|
||||
tc := &fakes.TestConn{}
|
||||
sr := &fakes.TestSessionRecorder{}
|
||||
rec := tsrecorder.New(sr, cl, cl.Now(), true)
|
||||
|
||||
c := &spdyRemoteConnRecorder{
|
||||
c := &conn{
|
||||
Conn: tc,
|
||||
log: zl.Sugar(),
|
||||
rec: rec,
|
||||
ch: CastHeader{
|
||||
ch: sessionrecording.CastHeader{
|
||||
Width: tt.width,
|
||||
Height: tt.height,
|
||||
},
|
||||
@ -118,13 +113,13 @@ func Test_Writes(t *testing.T) {
|
||||
}
|
||||
|
||||
// Assert that the expected bytes have been forwarded to the original destination.
|
||||
gotForwarded := tc.writeBuf.Bytes()
|
||||
gotForwarded := tc.WriteBufBytes()
|
||||
if !reflect.DeepEqual(gotForwarded, tt.wantForwarded) {
|
||||
t.Errorf("expected bytes not forwarded, wants\n%v\ngot\n%v", tt.wantForwarded, gotForwarded)
|
||||
}
|
||||
|
||||
// Assert that the expected bytes have been forwarded to the session recorder.
|
||||
gotRecorded := sr.buf.Bytes()
|
||||
gotRecorded := sr.Bytes()
|
||||
if !reflect.DeepEqual(gotRecorded, tt.wantRecorded) {
|
||||
t.Errorf("expected bytes not recorded, wants\n%v\ngot\n%v", tt.wantRecorded, gotRecorded)
|
||||
}
|
||||
@ -197,14 +192,10 @@ func Test_Reads(t *testing.T) {
|
||||
}
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
tc := &testConn{}
|
||||
sr := &testSessionRecorder{}
|
||||
rec := &recorder{
|
||||
conn: sr,
|
||||
clock: cl,
|
||||
start: cl.Now(),
|
||||
}
|
||||
c := &spdyRemoteConnRecorder{
|
||||
tc := &fakes.TestConn{}
|
||||
sr := &fakes.TestSessionRecorder{}
|
||||
rec := tsrecorder.New(sr, cl, cl.Now(), true)
|
||||
c := &conn{
|
||||
Conn: tc,
|
||||
log: zl.Sugar(),
|
||||
rec: rec,
|
||||
@ -213,9 +204,8 @@ func Test_Reads(t *testing.T) {
|
||||
|
||||
for i, input := range tt.inputs {
|
||||
c.zlibReqReader = reader
|
||||
tc.readBuf.Reset()
|
||||
_, err := tc.readBuf.Write(input)
|
||||
if err != nil {
|
||||
tc.ResetReadBuf()
|
||||
if err := tc.WriteReadBufBytes(input); err != nil {
|
||||
t.Fatalf("writing bytes to test conn: %v", err)
|
||||
}
|
||||
_, err = c.Read(make([]byte, len(input)))
|
||||
@ -244,19 +234,6 @@ func Test_Reads(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
func castLine(t *testing.T, p []byte, clock tstime.Clock) []byte {
|
||||
t.Helper()
|
||||
j, err := json.Marshal([]any{
|
||||
clock.Now().Sub(clock.Now()).Seconds(),
|
||||
"o",
|
||||
string(p),
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatalf("error marshalling cast line: %v", err)
|
||||
}
|
||||
return append(j, '\n')
|
||||
}
|
||||
|
||||
func resizeMsgBytes(t *testing.T, width, height int) []byte {
|
||||
t.Helper()
|
||||
bs, err := json.Marshal(spdyResizeMsg{Width: width, Height: height})
|
||||
@ -265,62 +242,3 @@ func resizeMsgBytes(t *testing.T, width, height int) []byte {
|
||||
}
|
||||
return bs
|
||||
}
|
||||
|
||||
func asciinemaResizeMsg(t *testing.T, width, height int) []byte {
|
||||
t.Helper()
|
||||
ch := CastHeader{
|
||||
Width: width,
|
||||
Height: height,
|
||||
}
|
||||
bs, err := json.Marshal(ch)
|
||||
if err != nil {
|
||||
t.Fatalf("error marshalling CastHeader: %v", err)
|
||||
}
|
||||
return append(bs, '\n')
|
||||
}
|
||||
|
||||
type testConn struct {
|
||||
net.Conn
|
||||
// writeBuf contains whatever was send to the conn via Write.
|
||||
writeBuf bytes.Buffer
|
||||
// readBuf contains whatever was sent to the conn via Read.
|
||||
readBuf bytes.Buffer
|
||||
sync.RWMutex // protects the following
|
||||
closed bool
|
||||
}
|
||||
|
||||
var _ net.Conn = &testConn{}
|
||||
|
||||
func (tc *testConn) Read(b []byte) (int, error) {
|
||||
return tc.readBuf.Read(b)
|
||||
}
|
||||
|
||||
func (tc *testConn) Write(b []byte) (int, error) {
|
||||
return tc.writeBuf.Write(b)
|
||||
}
|
||||
|
||||
func (tc *testConn) Close() error {
|
||||
tc.Lock()
|
||||
defer tc.Unlock()
|
||||
tc.closed = true
|
||||
return nil
|
||||
}
|
||||
func (tc *testConn) isClosed() bool {
|
||||
tc.Lock()
|
||||
defer tc.Unlock()
|
||||
return tc.closed
|
||||
}
|
||||
|
||||
type testSessionRecorder struct {
|
||||
// buf holds data that was sent to the session recorder.
|
||||
buf bytes.Buffer
|
||||
}
|
||||
|
||||
func (t *testSessionRecorder) Write(b []byte) (int, error) {
|
||||
return t.buf.Write(b)
|
||||
}
|
||||
|
||||
func (t *testSessionRecorder) Close() error {
|
||||
t.buf.Reset()
|
||||
return nil
|
||||
}
|
||||
@ -3,7 +3,7 @@
|
||||
|
||||
//go:build !plan9
|
||||
|
||||
package main
|
||||
package spdy
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
@ -3,7 +3,7 @@
|
||||
|
||||
//go:build !plan9
|
||||
|
||||
package main
|
||||
package spdy
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
@ -3,7 +3,7 @@
|
||||
|
||||
//go:build !plan9
|
||||
|
||||
package main
|
||||
package spdy
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
@ -3,7 +3,8 @@
|
||||
|
||||
//go:build !plan9
|
||||
|
||||
package main
|
||||
// Package tsrecorder contains functionality for connecting to a tsrecorder instance.
|
||||
package tsrecorder
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
@ -16,9 +17,18 @@
|
||||
"tailscale.com/tstime"
|
||||
)
|
||||
|
||||
func New(conn io.WriteCloser, clock tstime.Clock, start time.Time, failOpen bool) *Client {
|
||||
return &Client{
|
||||
start: start,
|
||||
clock: clock,
|
||||
conn: conn,
|
||||
failOpen: failOpen,
|
||||
}
|
||||
}
|
||||
|
||||
// recorder knows how to send the provided bytes to the configured tsrecorder
|
||||
// instance in asciinema format.
|
||||
type recorder struct {
|
||||
type Client struct {
|
||||
start time.Time
|
||||
clock tstime.Clock
|
||||
|
||||
@ -36,7 +46,7 @@ type recorder struct {
|
||||
|
||||
// Write appends timestamp to the provided bytes and sends them to the
|
||||
// configured tsrecorder.
|
||||
func (rec *recorder) Write(p []byte) (err error) {
|
||||
func (rec *Client) Write(p []byte) (err error) {
|
||||
if len(p) == 0 {
|
||||
return nil
|
||||
}
|
||||
@ -52,7 +62,7 @@ func (rec *recorder) Write(p []byte) (err error) {
|
||||
return fmt.Errorf("error marhalling payload: %w", err)
|
||||
}
|
||||
j = append(j, '\n')
|
||||
if err := rec.writeCastLine(j); err != nil {
|
||||
if err := rec.WriteCastLine(j); err != nil {
|
||||
if !rec.failOpen {
|
||||
return fmt.Errorf("error writing payload to recorder: %w", err)
|
||||
}
|
||||
@ -61,7 +71,7 @@ func (rec *recorder) Write(p []byte) (err error) {
|
||||
return nil
|
||||
}
|
||||
|
||||
func (rec *recorder) Close() error {
|
||||
func (rec *Client) Close() error {
|
||||
rec.mu.Lock()
|
||||
defer rec.mu.Unlock()
|
||||
if rec.conn == nil {
|
||||
@ -74,15 +84,20 @@ func (rec *recorder) Close() error {
|
||||
|
||||
// writeCastLine sends bytes to the tsrecorder. The bytes should be in
|
||||
// asciinema format.
|
||||
func (rec *recorder) writeCastLine(j []byte) error {
|
||||
rec.mu.Lock()
|
||||
defer rec.mu.Unlock()
|
||||
if rec.conn == nil {
|
||||
func (c *Client) WriteCastLine(j []byte) error {
|
||||
c.mu.Lock()
|
||||
defer c.mu.Unlock()
|
||||
if c.conn == nil {
|
||||
return errors.New("recorder closed")
|
||||
}
|
||||
_, err := rec.conn.Write(j)
|
||||
_, err := c.conn.Write(j)
|
||||
if err != nil {
|
||||
return fmt.Errorf("recorder write error: %w", err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
type ResizeMsg struct {
|
||||
Width int `json:"width"`
|
||||
Height int `json:"height"`
|
||||
}
|
||||
@ -1,7 +1,9 @@
|
||||
// Copyright (c) Tailscale Inc & AUTHORS
|
||||
// SPDX-License-Identifier: BSD-3-Clause
|
||||
|
||||
package tailssh
|
||||
// Package sessionrecording contains session recording utils shared amongst
|
||||
// Tailscale SSH and Kubernetes API server proxy session recording.
|
||||
package sessionrecording
|
||||
|
||||
import (
|
||||
"context"
|
||||
78
sessionrecording/header.go
Normal file
78
sessionrecording/header.go
Normal file
@ -0,0 +1,78 @@
|
||||
// Copyright (c) Tailscale Inc & AUTHORS
|
||||
// SPDX-License-Identifier: BSD-3-Clause
|
||||
|
||||
package sessionrecording
|
||||
|
||||
import "tailscale.com/tailcfg"
|
||||
|
||||
// CastHeader is the header of an asciinema file.
|
||||
type CastHeader struct {
|
||||
// Version is the asciinema file format version.
|
||||
Version int `json:"version"`
|
||||
|
||||
// Width is the terminal width in characters.
|
||||
// It is non-zero for Pty sessions.
|
||||
Width int `json:"width"`
|
||||
|
||||
// Height is the terminal height in characters.
|
||||
// It is non-zero for Pty sessions.
|
||||
Height int `json:"height"`
|
||||
|
||||
// Timestamp is the unix timestamp of when the recording started.
|
||||
Timestamp int64 `json:"timestamp"`
|
||||
|
||||
// Command is the command that was executed.
|
||||
// Typically empty for shell sessions.
|
||||
Command string `json:"command,omitempty"`
|
||||
|
||||
// SrcNode is the FQDN of the node originating the connection.
|
||||
// It is also the MagicDNS name for the node.
|
||||
// It does not have a trailing dot.
|
||||
// e.g. "host.tail-scale.ts.net"
|
||||
SrcNode string `json:"srcNode"`
|
||||
|
||||
// SrcNodeID is the node ID of the node originating the connection.
|
||||
SrcNodeID tailcfg.StableNodeID `json:"srcNodeID"`
|
||||
|
||||
// Tailscale-specific fields:
|
||||
// SrcNodeTags is the list of tags on the node originating the connection (if any).
|
||||
SrcNodeTags []string `json:"srcNodeTags,omitempty"`
|
||||
|
||||
// SrcNodeUserID is the user ID of the node originating the connection (if not tagged).
|
||||
SrcNodeUserID tailcfg.UserID `json:"srcNodeUserID,omitempty"` // if not tagged
|
||||
|
||||
// SrcNodeUser is the LoginName of the node originating the connection (if not tagged).
|
||||
SrcNodeUser string `json:"srcNodeUser,omitempty"`
|
||||
|
||||
// Fields that are only set for Tailscale SSH session recordings:
|
||||
|
||||
// Env is the environment variables of the session.
|
||||
// Only "TERM" is set (2023-03-22).
|
||||
Env map[string]string `json:"env"`
|
||||
|
||||
// SSHUser is the username as presented by the client.
|
||||
SSHUser string `json:"sshUser"` // as presented by the client
|
||||
|
||||
// LocalUser is the effective username on the server.
|
||||
LocalUser string `json:"localUser"`
|
||||
|
||||
// ConnectionID uniquely identifies a connection made to the SSH server.
|
||||
// It may be shared across multiple sessions over the same connection in
|
||||
// case of SSH multiplexing.
|
||||
ConnectionID string `json:"connectionID"`
|
||||
|
||||
// Fields that are only set for Kubernetes API server proxy session recordings:
|
||||
|
||||
Kubernetes *Kubernetes `json:"kubernetes,omitempty"`
|
||||
}
|
||||
|
||||
// Kubernetes contains 'kubectl exec' session specific information for
|
||||
// tsrecorder.
|
||||
type Kubernetes struct {
|
||||
// PodName is the name of the Pod being exec-ed.
|
||||
PodName string
|
||||
// Namespace is the namespace in which is the Pod that is being exec-ed.
|
||||
Namespace string
|
||||
// Container is the container being exec-ed.
|
||||
Container string
|
||||
}
|
||||
@ -36,6 +36,7 @@
|
||||
"tailscale.com/logtail/backoff"
|
||||
"tailscale.com/net/tsaddr"
|
||||
"tailscale.com/net/tsdial"
|
||||
"tailscale.com/sessionrecording"
|
||||
"tailscale.com/tailcfg"
|
||||
"tailscale.com/tempfork/gliderlabs/ssh"
|
||||
"tailscale.com/types/key"
|
||||
@ -1428,61 +1429,6 @@ func randBytes(n int) []byte {
|
||||
return b
|
||||
}
|
||||
|
||||
// CastHeader is the header of an asciinema file.
|
||||
type CastHeader struct {
|
||||
// Version is the asciinema file format version.
|
||||
Version int `json:"version"`
|
||||
|
||||
// Width is the terminal width in characters.
|
||||
// It is non-zero for Pty sessions.
|
||||
Width int `json:"width"`
|
||||
|
||||
// Height is the terminal height in characters.
|
||||
// It is non-zero for Pty sessions.
|
||||
Height int `json:"height"`
|
||||
|
||||
// Timestamp is the unix timestamp of when the recording started.
|
||||
Timestamp int64 `json:"timestamp"`
|
||||
|
||||
// Env is the environment variables of the session.
|
||||
// Only "TERM" is set (2023-03-22).
|
||||
Env map[string]string `json:"env"`
|
||||
|
||||
// Command is the command that was executed.
|
||||
// Typically empty for shell sessions.
|
||||
Command string `json:"command,omitempty"`
|
||||
|
||||
// Tailscale-specific fields:
|
||||
// SrcNode is the FQDN of the node originating the connection.
|
||||
// It is also the MagicDNS name for the node.
|
||||
// It does not have a trailing dot.
|
||||
// e.g. "host.tail-scale.ts.net"
|
||||
SrcNode string `json:"srcNode"`
|
||||
|
||||
// SrcNodeID is the node ID of the node originating the connection.
|
||||
SrcNodeID tailcfg.StableNodeID `json:"srcNodeID"`
|
||||
|
||||
// SrcNodeTags is the list of tags on the node originating the connection (if any).
|
||||
SrcNodeTags []string `json:"srcNodeTags,omitempty"`
|
||||
|
||||
// SrcNodeUserID is the user ID of the node originating the connection (if not tagged).
|
||||
SrcNodeUserID tailcfg.UserID `json:"srcNodeUserID,omitempty"` // if not tagged
|
||||
|
||||
// SrcNodeUser is the LoginName of the node originating the connection (if not tagged).
|
||||
SrcNodeUser string `json:"srcNodeUser,omitempty"`
|
||||
|
||||
// SSHUser is the username as presented by the client.
|
||||
SSHUser string `json:"sshUser"` // as presented by the client
|
||||
|
||||
// LocalUser is the effective username on the server.
|
||||
LocalUser string `json:"localUser"`
|
||||
|
||||
// ConnectionID uniquely identifies a connection made to the SSH server.
|
||||
// It may be shared across multiple sessions over the same connection in
|
||||
// case of SSH multiplexing.
|
||||
ConnectionID string `json:"connectionID"`
|
||||
}
|
||||
|
||||
func (ss *sshSession) openFileForRecording(now time.Time) (_ io.WriteCloser, err error) {
|
||||
varRoot := ss.conn.srv.lb.TailscaleVarRoot()
|
||||
if varRoot == "" {
|
||||
@ -1548,7 +1494,7 @@ func (ss *sshSession) startNewRecording() (_ *recording, err error) {
|
||||
} else {
|
||||
var errChan <-chan error
|
||||
var attempts []*tailcfg.SSHRecordingAttempt
|
||||
rec.out, attempts, errChan, err = ConnectToRecorder(ctx, recorders, ss.conn.srv.lb.Dialer().UserDial)
|
||||
rec.out, attempts, errChan, err = sessionrecording.ConnectToRecorder(ctx, recorders, ss.conn.srv.lb.Dialer().UserDial)
|
||||
if err != nil {
|
||||
if onFailure != nil && onFailure.NotifyURL != "" && len(attempts) > 0 {
|
||||
eventType := tailcfg.SSHSessionRecordingFailed
|
||||
@ -1598,7 +1544,7 @@ func (ss *sshSession) startNewRecording() (_ *recording, err error) {
|
||||
}()
|
||||
}
|
||||
|
||||
ch := CastHeader{
|
||||
ch := sessionrecording.CastHeader{
|
||||
Version: 2,
|
||||
Width: w.Width,
|
||||
Height: w.Height,
|
||||
|
||||
@ -36,6 +36,7 @@
|
||||
"tailscale.com/ipn/store/mem"
|
||||
"tailscale.com/net/memnet"
|
||||
"tailscale.com/net/tsdial"
|
||||
"tailscale.com/sessionrecording"
|
||||
"tailscale.com/tailcfg"
|
||||
"tailscale.com/tempfork/gliderlabs/ssh"
|
||||
"tailscale.com/tsd"
|
||||
@ -630,7 +631,7 @@ func TestSSHRecordingNonInteractive(t *testing.T) {
|
||||
wg.Wait()
|
||||
|
||||
<-ctx.Done() // wait for recording to finish
|
||||
var ch CastHeader
|
||||
var ch sessionrecording.CastHeader
|
||||
if err := json.NewDecoder(bytes.NewReader(recording)).Decode(&ch); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user