Add some additional init container tests that work via monitoring
container lifetime based on logs written to a common file. This allows
more easily writing assertions about the container lifetimes with
respect to one another.
6f2cd1b5bd swapped the order of cancel() and
closeFn() so that closeFn got called first when the test was done. This caused
it to block while waiting for goroutines which themselves were waiting for
the context cancellation. The test still shut down, it just took ~86s instead
of ~30s.
The fix is to register the cancel twice: once as soon as the context is
created (to clean up in case of an unexpected panic) and once after
closeFn (because then it'll get called first, as before).
https://github.com/kubernetes/kubernetes/pull/109728 added a
golangci-strict.yaml where gingkolinter and stylecheck (some recent additions
to golangci.yaml) were missing.
To prevent such mistakes in the future, lines that are intentionally different
get annotated with a comment about golangci-strict.yaml or golangci.yaml.
Then a suitable diff command in the new verify-golangci-lint-config.sh checks
that only such lines, comments and blank lines are different.
The test creates a Service exposing two protocols on the same port
and a backend that replies on both protocols.
1. Test that Service with works for both protocol
2. Update Service to expose only the TCP port
3. Verify that TCP works and UDP does not work
4. Update Service to expose only the UDP port
5. Verify that TCP does not work and UDP does work
Change-Id: Ic4f3a6509e332aa5694d20dfc3b223d7063a7871
The long-term goal is that when "make verify" is invoked in pull job, it will
also run golangci-lint with the strict configuration and write an
$ARTIFACTS/golangci-lint-githubactions.log file with GitHub actions
annotations. How to get those published for the GitHub PR is open.
When "make verify" is invoked manually or in any other job, the stricter check
will be skipped. That works because "PR_NUMBER" is only set for pre-merge
jobs (https://github.com/kubernetes/test-infra/blob/master/prow/jobs.md#job-environment-variables).
Because strict linting is still new and might not be useful without a better
UI (= GitHub annotations), this PR does not fully enable the integration into
"make verify". Instead, the new verify-golangci-lint-pr.sh is excluded from it
and needs to be run in a separate job.
It is useful to check new code with a stricter configuration because we want it
to be of higher quality. Code reviews also become easier when reviewers don't
need to point out inefficient code manually.
What exactly should be enabled is up for debate. The current config uses the
golangci-lint defaults plus everything that is enabled explicitly by the normal
golangci.yaml, just to be on the safe side.
Test 2 scenarios:
- pod can connect to a terminating pods
- terminating pod can connect to other pods
Change-Id: Ia5dc4e7370cc055df452bf7cbaddd9901b4d229d
