Added resources limits definition for wait-for-db container (#2501)

# What this PR does
Added 'resources limits' definition for wait-for-db container

## Which issue(s) this PR fixes

I face a problem: when i install OnCall by Helm, my pods with
oncall-engine and oncall-celery stuck on Init state, because they don't
have enough resources to run.

## Checklist

- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
- [ ] Documentation added (or `pr:no public docs` PR label added if not
required)

---------

Co-authored-by: Joey Orlando <joey.orlando@grafana.com>
Co-authored-by: Joey Orlando <joseph.t.orlando@gmail.com>

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+
+- [Helm] Added ability to specify `resources` definition within the `wait-for-db` init container by @Shelestov7
+  ([#2501](https://github.com/grafana/oncall/pull/2501))
+
 ### Changed
 
 - Deprecated `/maintenance` web UI page. Maintenance is now handled at the integration level and can be performed

helm/oncall/templates/_helpers.tpl

@@ -92,6 +92,8 @@ Create the name of the service account to use
   command: ['sh', '-c', "until (python manage.py migrate --check); do echo Waiting for database migrations; sleep 2; done"]
   securityContext:
   {{ toYaml .Values.init.securityContext | nindent 4 }}
+  resources:
+  {{ toYaml .Values.init.resources | nindent 4 }}
   env:
     {{- include "snippet.oncall.env" . | nindent 4 }}
     {{- include "snippet.mysql.env" . | nindent 4 }}
@@ -107,6 +109,8 @@ Create the name of the service account to use
   command: ['sh', '-c', "until (python manage.py migrate --check); do echo Waiting for database migrations; sleep 2; done"]
   securityContext:
   {{ toYaml .Values.init.securityContext | nindent 4 }}
+  resources:
+  {{ toYaml .Values.init.resources | nindent 4 }}
   env:
     {{- include "snippet.oncall.env" . | nindent 4 }}
     {{- include "snippet.postgresql.env" . | nindent 4 }}

helm/oncall/tests/__snapshot__/wait_for_db_test.yaml.snap

@@ -71,6 +71,13 @@ database.type=mysql -> should create initContainer for MySQL database (default):
       image: grafana/oncall:v1.2.36
       imagePullPolicy: Always
       name: wait-for-db
+      resources:
+        limits:
+          cpu: 100m
+          memory: 128Mi
+        requests:
+          cpu: 100m
+          memory: 128Mi
       securityContext: {}
   2: |
     - command:
@@ -144,6 +151,13 @@ database.type=mysql -> should create initContainer for MySQL database (default):
       image: grafana/oncall:v1.2.36
       imagePullPolicy: Always
       name: wait-for-db
+      resources:
+        limits:
+          cpu: 100m
+          memory: 128Mi
+        requests:
+          cpu: 100m
+          memory: 128Mi
       securityContext: {}
 database.type=postgresql -> should create initContainer for PostgreSQL database:
   1: |
@@ -220,6 +234,13 @@ database.type=postgresql -> should create initContainer for PostgreSQL database:
       image: grafana/oncall:v1.2.36
       imagePullPolicy: Always
       name: wait-for-db
+      resources:
+        limits:
+          cpu: 100m
+          memory: 128Mi
+        requests:
+          cpu: 100m
+          memory: 128Mi
       securityContext: {}
   2: |
     - command:
@@ -295,4 +316,11 @@ database.type=postgresql -> should create initContainer for PostgreSQL database:
       image: grafana/oncall:v1.2.36
       imagePullPolicy: Always
       name: wait-for-db
+      resources:
+        limits:
+          cpu: 100m
+          memory: 128Mi
+        requests:
+          cpu: 100m
+          memory: 128Mi
       securityContext: {}

helm/oncall/tests/wait_for_db_test.yaml

@@ -8,6 +8,14 @@ chart:
   appVersion: v1.2.36
 tests:
   - it: database.type=mysql -> should create initContainer for MySQL database (default)
+    set:
+      init.resources:
+        limits:
+          cpu: 100m
+          memory: 128Mi
+        requests:
+           cpu: 100m
+           memory: 128Mi
     asserts:
       - contains:
           path: spec.template.spec.initContainers
@@ -26,6 +34,13 @@ tests:
     set:
       database.type: postgresql
       externalPostgresql.host: some-postgresql-host
+      init.resources:
+        limits:
+          cpu: 100m
+          memory: 128Mi
+        requests:
+           cpu: 100m
+           memory: 128Mi
     asserts:
       - contains:
           path: spec.template.spec.initContainers

helm/oncall/values.yaml

@@ -422,3 +422,10 @@ init:
     # runAsGroup: 1337
     # runAsNonRoot: true
     # runAsUser: 1337
+  resources: {}
+     # limits:
+     #   cpu: 100m
+     #   memory: 128Mi
+     # requests:
+     #   cpu: 100m
+     #   memory: 128Mi