RFC for PipeCD ECS Application

[khanhtc1202]

What this PR does / why we need it:

Which issue(s) this PR fixes:

Related to #1568

Does this PR introduce a user-facing change?:

NONE

[pipecd-bot]

Code coverage for golang is 32.93%. This pull request increases coverage by 0.07%.

File	Function	Base	Head	Diff
pkg/app/api/grpcapi/web_api.go	WebAPI.GetInsightApplicationCount	0.00%	0.00%	+0.00%
pkg/app/ops/insightcollector/applications.go	Collector.updateApplicationCounts	0.00%	0.00%	+0.00%
pkg/insight/applicationcount.go	MakeApplicationCounts	0.00%	100.00%	+100.00%

[pipecd-bot]

Code coverage for golang is 32.93%. This pull request increases coverage by 0.07%.

File	Function	Base	Head	Diff
pkg/app/api/grpcapi/web_api.go	WebAPI.GetInsightApplicationCount	0.00%	0.00%	+0.00%
pkg/app/ops/insightcollector/applications.go	Collector.updateApplicationCounts	0.00%	0.00%	+0.00%
pkg/insight/applicationcount.go	MakeApplicationCounts	0.00%	100.00%	+100.00%

[nakabonne]

Looks cool
/lgtm

[nghialv]

Please add more examples for quick sync, canary, blue-green. That helps us evaluating the definition of stages easier.

[khanhtc1202]

@nghialv @nakabonne thanks for your comment 🙏 I added some pipe yaml config examples for canary and blue/green release deployment, PTAL 👀

[pipecd-bot]

Code coverage for golang is 32.93%. This pull request increases coverage by 0.07%.

File	Function	Base	Head	Diff
pkg/app/api/grpcapi/web_api.go	WebAPI.GetInsightApplicationCount	0.00%	0.00%	+0.00%
pkg/app/ops/insightcollector/applications.go	Collector.updateApplicationCounts	0.00%	0.00%	+0.00%
pkg/insight/applicationcount.go	MakeApplicationCounts	0.00%	100.00%	+100.00%

[nghialv]

👀

[nghialv]

/approve

[pipecd-bot]

This pull request is APPROVED by nghialv.

Approvers can cancel the approval by writing /approve cancel in a comment. Any additional commits also will change this pull request to be not-approved.

[pipecd-bot]

failed to handle template rule manifests

Details

Error: unabled to render file: manifests/pipecd/prom-rules/alerting_rules.yml, err: template: template-plugin:11: undefined variable "$labels"