ANCHOR-408 helm-charts/sep-service helm chart observer metrics

[reecexlm]

This change updates the legacy/main-1.2 helm chart to externalize the optionalMetricsEnabled parameter and also add metrics port for the stellar observer.

PR Structure

• [x ] This PR has reasonably narrow scope (if not, break it down into smaller PRs).
• This PR avoids mixing refactoring changes with feature changes (split into two PRs
  otherwise).
• [x ] This PR's title starts with name of package that is most changed in the PR, ex.
  paymentservice.stellar, or all or doc if the changes are broad or impact many
  packages.

Thoroughness

I have tested this PR using helm template command. Results verified using example-values file and uncommenting the stellar observer section.

What

helm chart updates.

Why

partner needs to access metrics port for observer in order to integrate with datadog.
also needs to enable the optionalmetrics and need this parameter available in helm chart values.

Known limitations

Test Evidence:
helm template sepservice . -f example_values.yaml > ~/out

        optionalMetricsEnabled: true  # optional metrics that periodically query the database
        runInterval: 30                 # interval to query the database to generate the optional metrics

# Stellar Observer
apiVersion: apps/v1
kind: Deployment
metadata:
  name: anchor-platform-observer
---snip---
          ports:
          - name: http
            containerPort: 8083
            protocol: TCP
          - name: metrics
            containerPort: 8082
            protocol: TCP

[stellar-jenkins]

Something went wrong with PR preview build please check

[philipliu]

I'm not the most qualified person to review these changes but LGTM. I'll approve once the tests pass.

[stellar-jenkins]

Something went wrong with PR preview build please check

[stellar-jenkins]

Something went wrong with PR preview build please check

[stellar-jenkins]

Something went wrong with PR preview build please check

[stellar-jenkins]

Something went wrong with PR preview build please check

[stellar-jenkins]

Something went wrong with PR preview build please check

[stellar-jenkins]

Something went wrong with PR preview build please check

[stellar-jenkins]

Reference Server Preview is available here:
https://anchor-ref-pr1039.previews.kube001.services.stellar-ops.com/
SEP Server Preview is available here:
https://anchor-sep-pr1039.previews.kube001.services.stellar-ops.com/

[reecexlm]

Looking at the deployed sep server in PR PReviews i see using default values:

      metrics-service:
        optionalMetricsEnabled: false  # optional metrics that periodically query the database
        runInterval: 30                 # interval to query the database to generate the optional metrics

observer ports

          ports:
          - name: http
            containerPort: 8083
            protocol: TCP
          - name: metrics
            containerPort: 8082
            protocol: TCP

[stellar-jenkins]

Reference Server Preview is available here:
https://anchor-ref-pr1039.previews.kube001.services.stellar-ops.com/
SEP Server Preview is available here:
https://anchor-sep-pr1039.previews.kube001.services.stellar-ops.com/

[stellar-jenkins]

Reference Server Preview is available here:
https://anchor-ref-pr1039.previews.kube001.services.stellar-ops.com/
SEP Server Preview is available here:
https://anchor-sep-pr1039.previews.kube001.services.stellar-ops.com/

[stellar-jenkins]

Reference Server Preview is available here:
https://anchor-ref-pr1039.previews.kube001.services.stellar-ops.com/
SEP Server Preview is available here:
https://anchor-sep-pr1039.previews.kube001.services.stellar-ops.com/

[reecexlm]

see stellar-anchor-platform-preview/3718/console
updated helm values in preview and they were reflected in the configmap.
metrics-service:
optionalMetricsEnabled: true # optional metrics that periodically query the database
runInterval: 65 # interval to query the database to generate the optional metrics