fix: wait for pidfile

[yitsushi]

What this PR does / why we need it:

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 #

Special notes for your reviewer:

Checklist:

• squashed commits into logical changes
• includes documentation
• adds unit tests
• adds or updates e2e tests

[codecov-commenter]

Codecov Report

Merging #298 (6f4ec07) into main (bfe06dc) will not change coverage.
The diff coverage is n/a.

❗ Current head 6f4ec07 differs from pull request most recent head edb1fec. Consider uploading reports for the commit edb1fec to get more accurate results

@@           Coverage Diff           @@
##             main     #298   +/-   ##
=======================================
  Coverage   59.23%   59.23%           
=======================================
  Files          49       49           
  Lines        2399     2399           
=======================================
  Hits         1421     1421           
+ Misses        869      868    -1     
- Partials      109      110    +1     

Impacted Files	Coverage Δ
pkg/queue/queue.go	93.93% <0.00%> (-6.07%)	⬇️
infrastructure/containerd/event_service.go	59.64% <0.00%> (+3.50%)	⬆️

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[yitsushi]

e2e run: https://github.com/weaveworks/flintlock/actions/runs/1520405713

Failed, but unrelated:

time="2021-11-30T10:39:08Z" level=error msg="failed to reconcile vmid ns0/mvm0: executing plan: executing plan steps: executing steps: executing step runtime_volume_mount: mount images docker.io/richardcase/ubuntu-bionic-test:cloudimage_v0.0.1 for volume use: getting image docker.io/richardcase/ubuntu-bionic-test:cloudimage_v0.0.1 for owner ns0/mvm0: pulling image using containerd: failed to copy: httpReadSeeker: failed open: unexpected status code https://registry-1.docker.io/v2/richardcase/ubuntu-bionic-test/manifests/sha256:371792335fe2360e0fd30108e42eb565c990140aeb9bcc796de10a59da54beb6: 429 Too Many Requests - Server message: toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit" controller=microvm

429 Too Many Requests - Server message: toomanyrequests:
  You have reached your pull rate limit.
  You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit

[yitsushi]

New run hope it will not hit rate limit now: https://github.com/weaveworks/flintlock/runs/4366216033?check_suite_focus=true

Nope it's still rate limit:

time="2021-11-30T10:54:25Z" level=error msg="failed to reconcile vmid ns0/mvm0: executing plan: executing plan steps: executing steps: executing step runtime_volume_mount: mount images docker.io/richardcase/ubuntu-bionic-test:cloudimage_v0.0.1 for volume use: getting image docker.io/richardcase/ubuntu-bionic-test:cloudimage_v0.0.1 for owner ns0/mvm0: pulling image using containerd: failed to copy: httpReadSeeker: failed open: unexpected status code https://registry-1.docker.io/v2/richardcase/ubuntu-bionic-test/manifests/sha256:371792335fe2360e0fd30108e42eb565c990140aeb9bcc796de10a59da54beb6: 429 Too Many Requests - Server message: toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit" controller=microvm

429 Too Many Requests - Server message: toomanyrequests: You have reached your pull rate limit.

[yitsushi]

Let's try again: https://github.com/weaveworks/flintlock/actions/runs/1521365501

[Callisto13]

10th time's the charm