The network connection might not yet be established by the time the
container starts, causing the dig command to fail.
Retrying the dig command will solve this issue. This approach is similar
to the other DNS Conformance tests.
dnsmasq 2.79 introduced a change to respond to all norecurse queries with ServFail.
This is to prevent cache snooping where an adversary can figure out if a particular hostname has been looked up or not.
These tests do not need the norecurse flag, hence removing it.
If dig fails to reach the DNS, it will output errors to stdout, which
can cause the test -n to falsely pass:
ubuntu@ubuntu:~$ dig +notcp +noall +answer +search kubernetes.default A
;; connection timed out; no servers could be reached
command terminated with exit code 9
ubuntu@ubuntu:~$ test -n "$(dig +notcp +noall +answer +search kubernetes.default A)" && echo OK
OK
This patch solves this issue by making sure the dig command actually succeeds
before checking its output.
Automatic merge from submit-queue (batch tested with PRs 64174, 64187, 64216, 63265, 64223). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Extend dns configmap tests to include CoreDNS
**What this PR does / why we need it**:
This PR extends the DNS configmap e2e tests to include testing the CoreDNS ConfigMap.
The tests now test the equivalent `stubdomain`, `federation` and `upstreamnameserver` configuration of kube-dns for CoreDNS, when CoreDNS is the installed DNS server.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#62865
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
utils/image/manifest has an additional `arch` parameter, which determines
whether an image ends in `-$ARCH` (like `-amd64`).
All locations that previously had gcr.io urls referenced in costants or inline
have been updated to refere test/utils/image.
Claudiu Belu