This allows kubelets to stop the necessary work when the context has
been canceled (e.g., connection closed), and not leaking a goroutine
and inotify watcher waiting indefinitely.
But under a new path - `/metrics/cadvisor`. This ensures a secure port
still exists for metrics while getting the benefit of separating out
container metrics from the kubelet's metrics.
Module remotecommand originally part of kubernetes/pkg/client/unversioned was moved
to client-go/tools, and will be used as authoritative in kubectl, e2e and other places.
Module remotecommand relies on util/exec module which will be copied to client-go/pkg/util
Add support for following redirects to the SpdyRoundTripper. This is
necessary for clients using it directly (e.g. the apiserver talking
directly to the kubelet) because the CRI streaming server issues a
redirect for streaming requests.
Also extract common logic for following redirects.
- adjust ports to int32
- CRI flows the websocket ports as query params
- Do not validate ports since the protocol is unknown
SPDY flows the ports as headers and websockets uses query params
- Only flow query params if there is at least one port query param
Automatic merge from submit-queue
kubelet: remove the pleg health check from healthz
This prevents kubelet from being killed when docker hangs.
Also, kubelet will report node not ready if PLEG hangs (`docker ps` + `docker inspect`).
This allows us to interrupt/kill the executed command if it exceeds the
timeout (not implemented by this commit).
Set timeout in Exec probes. HTTPGet and TCPSocket probes respect the
timeout, while Exec probes used to ignore it.
Add e2e test for exec probe with timeout. However, the test is skipped
while the default exec handler doesn't support timeouts.
Before this change, Authorize() method was just returning an error,
regardless of whether the user is unauthorized or whether there
is some other unrelated error. Returning boolean with information
about user authorization and error (which should be unrelated to
the authorization) separately will make it easier to debug.
Fixes#27974
Add support for terminal resizing for exec, attach, and run. Note that for Docker, exec sessions
inherit the environment from the primary process, so if the container was created with tty=false,
that means the exec session's TERM variable will default to "dumb". Users can override this by
setting TERM=xterm (or whatever is appropriate) to get the correct "smart" terminal behavior.
PLEG is reponsible for listing the pods running on the node. If it's hung
due to non-responsive container runtime or internal bugs, we should restart
kubelet.
Yu-Ju Hong