Updates tailscale/tailscale#13839
Adds a new blockblame package which can detect common MITM SSL certificates used by network appliances. We use this in `tlsdial` to display a dedicated health warning when we cannot connect to control, and a network appliance MITM attack is detected.
Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
Adds logic to `checkExitNodePrefsLocked` to return an error when
attempting to use exit nodes on a platform where this is not supported.
This mirrors logic that was added to error out when trying to use `ssh`
on an unsupported platform, and has very similar semantics.
Fixes https://github.com/tailscale/tailscale/issues/13724
Signed-off-by: Mario Minardi <mario@tailscale.com>
* updates to LocalBackend require metrics to be passed in which are now initialized
* os.MkdirTemp isn't supported in wasm/js so we simply return empty
string for logger
* adds a UDP dialer which was missing and led to the dialer being
incompletely initialized
Fixes#10454 and #8272
Signed-off-by: Christian <christian@devzero.io>
For a customer that wants to run their own DERP prober, let's add a
/healthz endpoint that can be used to monitor derpprobe itself.
Updates #6526
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Iba315c999fc0b1a93d8c503c07cc733b4c8d5b6b
This helps better distinguish what is generating activity to the
Tailscale public API.
Updates tailscale/corp#23838
Signed-off-by: Percy Wegmann <percy@tailscale.com>
We were using google/uuid in two places and that brought in database/sql/driver.
We didn't need it in either place.
Updates #13760
Updates tailscale/corp#20099
Change-Id: Ieed32f1bebe35d35f47ec5a2a429268f24f11f1f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
cmd/k8s-operator,k8s-operator/apis: set a readiness condition on egress Services
Set a readiness condition on ExternalName Services that define a tailnet target
to route cluster traffic to via a ProxyGroup's proxies. The condition
is set to true if at least one proxy is currently set up to route.
Updates tailscale/tailscale#13406
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
We don't need to error out and continuously reconcile if ProxyClass
has not (yet) been created, once it gets created the ProxyGroup
reconciler will get triggered.
Updates tailscale/tailscale#13406
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
Ensure that .status.podIPs is used to select Pod's IP
in all reconcilers.
Updates tailscale/tailscale#13406
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
As discussed in #13684, base the ProxyGroup's proxy definitions on the same
scaffolding as the existing proxies, as defined in proxy.yaml
Updates #13406
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
Currently egress Services for ProxyGroup only work for Pods and Services
with IPv4 addresses. Ensure that it works on dual stack clusters by reading
proxy Pod's IP from the .status.podIPs list that always contains both
IPv4 and IPv6 address (if the Pod has them) rather than .status.podIP that
could contain IPv6 only for a dual stack cluster.
Updates tailscale/tailscale#13406
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
The default ProxyClass can be set via helm chart or env var, and applies
to all proxies that do not otherwise have an explicit ProxyClass set.
This ensures proxies created by the new ProxyGroup CRD are consistent
with the behaviour of existing proxies
Nearby but unrelated changes:
* Fix up double error logs (controller runtime logs returned errors)
* Fix a couple of variable names
Updates #13406
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
Rearrange conditionals to reduce indentation and make it a bit easier to read
the logic. Also makes some error message updates for better consistency
with the recent decision around capitalising resource names and the
upcoming addition of config secrets.
Updates #cleanup
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
Implements the controller for the new ProxyGroup CRD, designed for
running proxies in a high availability configuration. Each proxy gets
its own config and state Secret, and its own tailscale node ID.
We are currently mounting all of the config secrets into the container,
but will stop mounting them and instead read them directly from the kube
API once #13578 is implemented.
Updates #13406
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
Adds a new reconciler that reconciles ExternalName Services that define a
tailnet target that should be exposed to cluster workloads on a ProxyGroup's
proxies.
The reconciler ensures that for each such service, the config mounted to
the proxies is updated with the tailnet target definition and that
and EndpointSlice and ClusterIP Service are created for the service.
Adds a new reconciler that ensures that as proxy Pods become ready to route
traffic to a tailnet target, the EndpointSlice for the target is updated
with the Pods' endpoints.
Updates tailscale/tailscale#13406
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
The AddSNATRuleForDst rule was adding a new rule each time it was called including:
- if a rule already existed
- if a rule matching the destination, but with different desired source already existed
This was causing issues especially for the in-progress egress HA proxies work,
where the rules are now refreshed more frequently, so more redundant rules
were being created.
This change:
- only creates the rule if it doesn't already exist
- if a rule for the same dst, but different source is found, delete it
- also ensures that egress proxies refresh firewall rules
if the node's tailnet IP changes
Updates tailscale/tailscale#13406
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
In prep for a future port 80 MITM fix, make the 'debug ts2021' command
retry once after a failure to give it a chance to pick a new strategy.
Updates #13597
Change-Id: Icb7bad60cbf0dbec78097df4a00e9795757bc8e4
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
* cmd/containerboot,kube,util/linuxfw: configure kube egress proxies to route to 1+ tailnet targets
This commit is first part of the work to allow running multiple
replicas of the Kubernetes operator egress proxies per tailnet service +
to allow exposing multiple tailnet services via each proxy replica.
This expands the existing iptables/nftables-based proxy configuration
mechanism.
A proxy can now be configured to route to one or more tailnet targets
via a (mounted) config file that, for each tailnet target, specifies:
- the target's tailnet IP or FQDN
- mappings of container ports to which cluster workloads will send traffic to
tailnet target ports where the traffic should be forwarded.
Example configfile contents:
{
"some-svc": {"tailnetTarget":{"fqdn":"foo.tailnetxyz.ts.net","ports"{"tcp:4006:80":{"protocol":"tcp","matchPort":4006,"targetPort":80},"tcp:4007:443":{"protocol":"tcp","matchPort":4007,"targetPort":443}}}}
}
A proxy that is configured with this config file will configure firewall rules
to route cluster traffic to the tailnet targets. It will then watch the config file
for updates as well as monitor relevant netmap updates and reconfigure firewall
as needed.
This adds a bunch of new iptables/nftables functionality to make it easier to dynamically update
the firewall rules without needing to restart the proxy Pod as well as to make
it easier to debug/understand the rules:
- for iptables, each portmapping is a DNAT rule with a comment pointing
at the 'service',i.e:
-A PREROUTING ! -i tailscale0 -p tcp -m tcp --dport 4006 -m comment --comment "some-svc:tcp:4006 -> tcp:80" -j DNAT --to-destination 100.64.1.18:80
Additionally there is a SNAT rule for each tailnet target, to mask the source address.
- for nftables, a separate prerouting chain is created for each tailnet target
and all the portmapping rules are placed in that chain. This makes it easier
to look up rules and delete services when no longer needed.
(nftables allows hooking a custom chain to a prerouting hook, so no extra work
is needed to ensure that the rules in the service chains are evaluated).
The next steps will be to get the Kubernetes Operator to generate
the configfile and ensure it is mounted to the relevant proxy nodes.
Updates tailscale/tailscale#13406
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
The operator creates a non-reusable auth key for each of
the cluster proxies that it creates and puts in the tailscaled
configfile mounted to the proxies.
The proxies are always tagged, and their state is persisted
in a Kubernetes Secret, so their node keys are expected to never
be regenerated, so that they don't need to re-auth.
Some tailnet configurations however have seen issues where the auth
keys being left in the tailscaled configfile cause the proxies
to end up in unauthorized state after a restart at a later point
in time.
Currently, we have not found a way to reproduce this issue,
however this commit removes the auth key from the config once
the proxy can be assumed to have logged in.
If an existing, logged-in proxy is upgraded to this version,
its redundant auth key will be removed from the conffile.
If an existing, logged-in proxy is downgraded from this version
to a previous version, it will work as before without re-issuing key
as the previous code did not enforce that a key must be present.
Updates tailscale/tailscale#13451
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
The ProxyGroup CRD specifies a set of N pods which will each be a
tailnet device, and will have M different ingress or egress services
mapped onto them. It is the mechanism for specifying how highly
available proxies need to be. This commit only adds the definition, no
controller loop, and so it is not currently functional.
This commit also splits out TailnetDevice and RecorderTailnetDevice
into separate structs because the URL field is specific to recorders,
but we want a more generic struct for use in the ProxyGroup status field.
Updates #13406
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
this commit changes usermetrics to be non-global, this is a building
block for correct metrics if a go process runs multiple tsnets or
in tests.
Updates #13420
Updates tailscale/corp#22075
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
Updates tailscale/tailscale#13326
Adds a CLI subcommand to perform DNS queries using the internal DNS forwarder and observe its internals (namely, which upstream resolvers are being used).
Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
containerboot's main.go had grown to well over 1000 lines with
lots of disparate bits of functionality. This commit is pure copy-
paste to group related functionality outside of the main function
into its own set of files. Everything is still in the main package
to keep the diff incremental and reviewable.
Updates #cleanup
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
cmd/k8s-operator,k8s-operator,kube: Add TSRecorder CRD + controller
Deploys tsrecorder images to the operator's cluster. S3 storage is
configured via environment variables from a k8s Secret. Currently
only supports a single tsrecorder replica, but I've tried to take early
steps towards supporting multiple replicas by e.g. having a separate
secret for auth and state storage.
Example CR:
```yaml
apiVersion: tailscale.com/v1alpha1
kind: Recorder
metadata:
name: rec
spec:
enableUI: true
```
Updates #13298
Signed-off-by: Tom Proctor <tomhjp@users.noreply.github.com>
Rename kube/{types,client,api} -> kube/{kubetypes,kubeclient,kubeapi}
so that we don't need to rename the package on each import to
convey that it's kubernetes specific.
Updates#cleanup
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
Further split kube package into kube/{client,api,types}. This is so that
consumers who only need constants/static types don't have to import
the client and api bits.
Updates#cleanup
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
When tailscaled restarts and our watch connection goes down, we get
stuck in an infinite loop printing `ipnbus error: EOF` (which ended up
consuming all the disk space on my laptop via the log file). Instead,
handle errors in `watchIPNBus` and reconnect after a short delay.
Updates #1708
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
Updates tailscale/tailscale#13326
This PR begins implementing a `tailscale dns` command group in the Tailscale CLI. It provides an initial implementation of `tailscale dns status` which dumps the state of the internal DNS forwarder.
Two new endpoints were added in LocalAPI to support the CLI functionality:
- `/netmap`: dumps a copy of the last received network map (because the CLI shouldn't have to listen to the ipn bus for a copy)
- `/dns-osconfig`: dumps the OS DNS configuration (this will be very handy for the UI clients as well, as they currently do not display this information)
My plan is to implement other subcommands mentioned in tailscale/tailscale#13326, such as `query`, in later PRs.
Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
We've added more probe targets recently which has resulted in more
timeouts behind restrictive NATs in localized testing that don't
like how many flows we are creating at once. Not so much an issue
for datacenter or cloud-hosted deployments.
Updates tailscale/corp#22114
Signed-off-by: Jordan Whited <jordan@tailscale.com>
* cmd/k8s-operator,k8s-operator/sessonrecording: ensure CastHeader contains terminal size
For tsrecorder to be able to play session recordings, the recording's
CastHeader must have '.Width' and '.Height' fields set to non-zero.
Kubectl (or whoever is the client that initiates the 'kubectl exec'
session recording) sends the terminal dimensions in a resize message that
the API server proxy can intercept, however that races with the first server
message that we need to record.
This PR ensures we wait for the terminal dimensions to be processed from
the first resize message before any other data is sent, so that for all
sessions with terminal attached, the header of the session recording
contains the terminal dimensions and the recording can be played by tsrecorder.
Updates tailscale/tailscale#19821
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
Previously, despite what the commit said, we were using a raw IP socket
that was *not* an AF_PACKET socket, and thus was subject to the host
firewall rules. Switch to using a real AF_PACKET socket to actually get
the functionality we want.
Updates #13140
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: If657daeeda9ab8d967e75a4f049c66e2bca54b78
Currently, we use PermitRead/PermitWrite/PermitCert permission flags to determine which operations are allowed for a LocalAPI client.
These checks are performed when localapi.Handler handles a request. Additionally, certain operations (e.g., changing the serve config)
requires the connected user to be a local admin. This approach is inherently racey and is subject to TOCTOU issues.
We consider it to be more critical on Windows environments, which are inherently multi-user, and therefore we prevent more than one
OS user from connecting and utilizing the LocalBackend at the same time. However, the same type of issues is also applicable to other
platforms when switching between profiles that have different OperatorUser values in ipn.Prefs.
We'd like to allow more than one Windows user to connect, but limit what they can see and do based on their access rights on the device
(e.g., an local admin or not) and to the currently active LoginProfile (e.g., owner/operator or not), while preventing TOCTOU issues on Windows
and other platforms. Therefore, we'd like to pass an actor from the LocalAPI to the LocalBackend to represent the user performing the operation.
The LocalBackend, or the profileManager down the line, will then check the actor's access rights to perform a given operation on the device
and against the current (and/or the target) profile.
This PR does not change the current permission model in any way, but it introduces the concept of an actor and includes some preparatory
work to pass it around. Temporarily, the ipnauth.Actor interface has methods like IsLocalSystem and IsLocalAdmin, which are only relevant
to the current permission model. It also lacks methods that will actually be used in the new model. We'll be adding these gradually in the next
PRs and removing the deprecated methods and the Permit* flags at the end of the transition.
Updates tailscale/corp#18342
Signed-off-by: Nick Khyl <nickk@tailscale.com>
