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tsweb: expose native Prometheus metrics in /debug/varz

Browse Source 
The handler will expose built-in process and Go metrics by default,
which currently duplicate some of the expvar-proxied metrics
(`goroutines` vs `go_goroutines`, `memstats` vs `go_memstats`), but as
long as their names are different, Prometheus server will just scrape
both.

This will change /debug/varz behaviour for most tsweb binaries, but
notably not for control, which configures a `tsweb.VarzHandler`
[explicitly](a5b5d5167f/cmd/tailcontrol/tailcontrol.go (L779))

Updates https://github.com/tailscale/corp/issues/10205

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
This commit is contained in:
Anton Tolchanov
2023-04-03 11:23:37 +01:00
committed by Anton Tolchanov
parent 690446c784
commit 11e6247d2a
6 changed files with 155 additions and 39 deletions
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45
cmd/derper/depaware.txt
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@@ -8,21 +8,63 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
W 💣 github.com/alexbrainman/sspi from github.com/alexbrainman/sspi/internal/common+
W github.com/alexbrainman/sspi/internal/common from github.com/alexbrainman/sspi/negotiate
W 💣 github.com/alexbrainman/sspi/negotiate from tailscale.com/net/tshttpproxy
github.com/beorn7/perks/quantile from github.com/prometheus/client_golang/prometheus
💣 github.com/cespare/xxhash/v2 from github.com/prometheus/client_golang/prometheus
github.com/fxamacker/cbor/v2 from tailscale.com/tka
github.com/golang/groupcache/lru from tailscale.com/net/dnscache
github.com/golang/protobuf/proto from github.com/matttproud/golang_protobuf_extensions/pbutil+
github.com/golang/protobuf/ptypes/timestamp from github.com/prometheus/client_model/go
github.com/hdevalence/ed25519consensus from tailscale.com/tka
L github.com/josharian/native from github.com/mdlayher/netlink+
L 💣 github.com/jsimonetti/rtnetlink from tailscale.com/net/interfaces
L github.com/jsimonetti/rtnetlink/internal/unix from github.com/jsimonetti/rtnetlink
github.com/klauspost/compress/flate from nhooyr.io/websocket
github.com/matttproud/golang_protobuf_extensions/pbutil from github.com/prometheus/common/expfmt
L 💣 github.com/mdlayher/netlink from github.com/jsimonetti/rtnetlink+
L 💣 github.com/mdlayher/netlink/nlenc from github.com/jsimonetti/rtnetlink+
L 💣 github.com/mdlayher/socket from github.com/mdlayher/netlink
💣 github.com/mitchellh/go-ps from tailscale.com/safesocket
💣 github.com/prometheus/client_golang/prometheus from tailscale.com/tsweb
github.com/prometheus/client_golang/prometheus/internal from github.com/prometheus/client_golang/prometheus
github.com/prometheus/client_model/go from github.com/prometheus/client_golang/prometheus+
github.com/prometheus/common/expfmt from github.com/prometheus/client_golang/prometheus+
github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg from github.com/prometheus/common/expfmt
github.com/prometheus/common/model from github.com/prometheus/client_golang/prometheus+
LD github.com/prometheus/procfs from github.com/prometheus/client_golang/prometheus
LD github.com/prometheus/procfs/internal/fs from github.com/prometheus/procfs
LD github.com/prometheus/procfs/internal/util from github.com/prometheus/procfs
github.com/x448/float16 from github.com/fxamacker/cbor/v2
💣 go4.org/mem from tailscale.com/client/tailscale+
go4.org/netipx from tailscale.com/wgengine/filter
W 💣 golang.zx2c4.com/wireguard/windows/tunnel/winipcfg from tailscale.com/net/interfaces+
google.golang.org/protobuf/encoding/prototext from github.com/golang/protobuf/proto+
google.golang.org/protobuf/encoding/protowire from github.com/golang/protobuf/proto+
google.golang.org/protobuf/internal/descfmt from google.golang.org/protobuf/internal/filedesc
google.golang.org/protobuf/internal/descopts from google.golang.org/protobuf/internal/filedesc+
google.golang.org/protobuf/internal/detrand from google.golang.org/protobuf/internal/descfmt+
google.golang.org/protobuf/internal/encoding/defval from google.golang.org/protobuf/internal/encoding/tag+
google.golang.org/protobuf/internal/encoding/messageset from google.golang.org/protobuf/encoding/prototext+
google.golang.org/protobuf/internal/encoding/tag from google.golang.org/protobuf/internal/impl
google.golang.org/protobuf/internal/encoding/text from google.golang.org/protobuf/encoding/prototext+
google.golang.org/protobuf/internal/errors from google.golang.org/protobuf/encoding/prototext+
google.golang.org/protobuf/internal/filedesc from google.golang.org/protobuf/internal/encoding/tag+
google.golang.org/protobuf/internal/filetype from google.golang.org/protobuf/runtime/protoimpl
google.golang.org/protobuf/internal/flags from google.golang.org/protobuf/encoding/prototext+
google.golang.org/protobuf/internal/genid from google.golang.org/protobuf/encoding/prototext+
💣 google.golang.org/protobuf/internal/impl from google.golang.org/protobuf/internal/filetype+
google.golang.org/protobuf/internal/order from google.golang.org/protobuf/encoding/prototext+
google.golang.org/protobuf/internal/pragma from google.golang.org/protobuf/encoding/prototext+
google.golang.org/protobuf/internal/set from google.golang.org/protobuf/encoding/prototext
💣 google.golang.org/protobuf/internal/strs from google.golang.org/protobuf/encoding/prototext+
google.golang.org/protobuf/internal/version from google.golang.org/protobuf/runtime/protoimpl
google.golang.org/protobuf/proto from github.com/golang/protobuf/proto+
google.golang.org/protobuf/reflect/protodesc from github.com/golang/protobuf/proto
💣 google.golang.org/protobuf/reflect/protoreflect from github.com/golang/protobuf/proto+
google.golang.org/protobuf/reflect/protoregistry from github.com/golang/protobuf/proto+
google.golang.org/protobuf/runtime/protoiface from github.com/golang/protobuf/proto+
google.golang.org/protobuf/runtime/protoimpl from github.com/golang/protobuf/proto+
google.golang.org/protobuf/types/descriptorpb from google.golang.org/protobuf/reflect/protodesc
google.golang.org/protobuf/types/known/timestamppb from github.com/golang/protobuf/ptypes/timestamp+
nhooyr.io/websocket from tailscale.com/cmd/derper+
nhooyr.io/websocket/internal/errd from nhooyr.io/websocket
nhooyr.io/websocket/internal/xsync from nhooyr.io/websocket
@@ -169,8 +211,10 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
expvar from tailscale.com/cmd/derper+
flag from tailscale.com/cmd/derper
fmt from compress/flate+
go/token from google.golang.org/protobuf/internal/strs
hash from crypto+
hash/crc32 from compress/gzip+
hash/fnv from google.golang.org/protobuf/internal/detrand
hash/maphash from go4.org/mem
html from net/http/pprof+
io from bufio+
@@ -201,6 +245,7 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
regexp from internal/profile+
regexp/syntax from regexp
runtime/debug from golang.org/x/crypto/acme+
runtime/metrics from github.com/prometheus/client_golang/prometheus+
runtime/pprof from net/http/pprof
runtime/trace from net/http/pprof
sort from compress/flate+