Added a helm implementation for the latest version of Judge0 with support for HPA

helm/charts/judge0-latest/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

helm/charts/judge0-latest/Chart.yaml

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+apiVersion: v2
+name: judge0
+description:   Helm implementation of Judge0 | Free,robust and scalable open-source online code execution system.
+type: application
+version: 0.1.0
+appVersion: "1.16.0"
+dependencies:
+  - condition: postgresql.enabled
+    name: postgresql
+    repository: https://kubernetes-charts.storage.googleapis.com/
+    tags:
+      - judge0-database
+    version: 7.7.2
+  - condition: redis.enabled
+    name: redis
+    repository: https://kubernetes-charts.storage.googleapis.com/
+    tags:
+      - judge0-redis
+    version: 10.2.0
+maintainers:
+- email: aayush.bajaj@cawstudios.com
+  name: Aayush Bajaj

helm/charts/judge0-latest/README.md

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+judge0
+======
+Helm implementation of Judge0 | Free ,robust and scalable open-source online code execution system.
+
+Current chart version is `1.0.0`
+
+Source code can be found [here](https://api.judge0.com)
+
+## Chart Requirements
+
+| Repository | Name | Version |
+|------------|------|---------|
+| https://kubernetes-charts.storage.googleapis.com/ | postgresql | 7.7.2 |
+| https://kubernetes-charts.storage.googleapis.com/ | redis | 10.2.0 |
+
+## Chart Values
+
+| Key | Type | Default | Description |
+|-----|------|---------|-------------|
+| COUNT | int | `3` |  |
+| MAINTENANCE_MODE | bool | `false` |  |
+| RAILS_MAX_THREADS | int | `10` |  |
+| external.postgresql.host | string | `"localhost"` |  |
+| external.postgresql.port | int | `5432` |  |
+| external.postgresql.postgresqlDatabase | string | `"judge"` |  |
+| external.postgresql.postgresqlPassword | string | `""` |  |
+| external.postgresql.postgresqlUsername | string | `"judge"` |  |
+| external.redis.host | string | `"localhost"` |  |
+| external.redis.password | string | `""` |  |
+| external.redis.port | int | `6379` |  |
+| image.registry | string | `"docker.io"` |  |
+| image.repository | string | `"judge0/api"` |  |
+| image.tag | string | `"1.5.0"` |  |
+| postgresql.enabled | bool | `true` |  |
+| postgresql.image.tag | float | `9.6` |  |
+| postgresql.postgresqlDatabase | string | `"judge"` |  |
+| postgresql.postgresqlPassword | string | `"uaeyjbzuyq"` |  |
+| postgresql.postgresqlUsername | string | `"judgemaster"` |  |
+| redis.cluster.enabled | bool | `false` |  |
+| redis.enabled | bool | `true` |  |
+| redis.password | string | `"a8iuw23iuizy"` |  |
+| service.annotations | string | `nil` |  |
+| service.externalTrafficPolicy | string | `"Cluster"` |  |
+| service.nodePorts.http | string | `""` |  |
+| service.port | int | `80` |  |
+| service.type | string | `"LoadBalancer"` |  |

helm/charts/judge0-latest/charts/postgresql/.helmignore

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+.git
+OWNERS

helm/charts/judge0-latest/charts/postgresql/Chart.yaml

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+apiVersion: v1
+appVersion: 11.6.0
+description: Chart for PostgreSQL, an object-relational database management system
+  (ORDBMS) with an emphasis on extensibility and on standards-compliance.
+home: https://www.postgresql.org/
+icon: https://bitnami.com/assets/stacks/postgresql/img/postgresql-stack-110x117.png
+keywords:
+- postgresql
+- postgres
+- database
+- sql
+- replication
+- cluster
+maintainers:
+- email: containers@bitnami.com
+  name: Bitnami
+- email: cedric@desaintmartin.fr
+  name: desaintmartin
+name: postgresql
+sources:
+- https://github.com/bitnami/bitnami-docker-postgresql
+version: 7.7.2

helm/charts/judge0-latest/charts/postgresql/ci/default-values.yaml

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+# Leave this file empty to ensure that CI runs builds against the default configuration in values.yaml.

helm/charts/judge0-latest/charts/postgresql/ci/shmvolume-disabled-values.yaml

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+shmVolume:
+  enabled: false

helm/charts/judge0-latest/charts/postgresql/files/README.md

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+Copy here your postgresql.conf and/or pg_hba.conf files to use it as a config map.

helm/charts/judge0-latest/charts/postgresql/files/conf.d/README.md

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+If you don't want to provide the whole configuration file and only specify certain parameters, you can copy here your extended `.conf` files.
+These files will be injected as a config maps and add/overwrite the default configuration using the `include_dir` directive that allows settings to be loaded from files other than the default `postgresql.conf`.
+
+More info in the [bitnami-docker-postgresql README](https://github.com/bitnami/bitnami-docker-postgresql#configuration-file).

helm/charts/judge0-latest/charts/postgresql/files/docker-entrypoint-initdb.d/README.md

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+You can copy here your custom `.sh`, `.sql` or `.sql.gz` file so they are executed during the first boot of the image.
+
+More info in the [bitnami-docker-postgresql](https://github.com/bitnami/bitnami-docker-postgresql#initializing-a-new-instance) repository.

helm/charts/judge0-latest/charts/postgresql/templates/NOTES.txt

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+** Please be patient while the chart is being deployed **
+
+PostgreSQL can be accessed via port {{ template "postgresql.port" . }} on the following DNS name from within your cluster:
+
+    {{ template "postgresql.fullname" . }}.{{ .Release.Namespace }}.svc.cluster.local - Read/Write connection
+{{- if .Values.replication.enabled }}
+    {{ template "postgresql.fullname" . }}-read.{{ .Release.Namespace }}.svc.cluster.local - Read only connection
+{{- end }}
+
+{{- if and .Values.postgresqlPostgresPassword (not (eq .Values.postgresqlUsername "postgres")) }}
+
+To get the password for "postgres" run:
+
+    export POSTGRES_ADMIN_PASSWORD=$(kubectl get secret --namespace {{ .Release.Namespace }} {{ template "postgresql.secretName" . }} -o jsonpath="{.data.postgresql-postgres-password}" | base64 --decode)
+{{- end }}
+
+To get the password for "{{ template "postgresql.username" . }}" run:
+
+    export POSTGRES_PASSWORD=$(kubectl get secret --namespace {{ .Release.Namespace }} {{ template "postgresql.secretName" . }} -o jsonpath="{.data.postgresql-password}" | base64 --decode)
+
+To connect to your database run the following command:
+
+    kubectl run {{ template "postgresql.fullname" . }}-client --rm --tty -i --restart='Never' --namespace {{ .Release.Namespace }} --image {{ template "postgresql.image" . }} --env="PGPASSWORD=$POSTGRES_PASSWORD" {{- if and (.Values.networkPolicy.enabled) (not .Values.networkPolicy.allowExternal) }}
+   --labels="{{ template "postgresql.fullname" . }}-client=true" {{- end }} --command -- psql --host {{ template "postgresql.fullname" . }} -U {{ .Values.postgresqlUsername }} -d {{- if .Values.postgresqlDatabase }} {{ .Values.postgresqlDatabase }}{{- else }} postgres{{- end }} -p {{ template "postgresql.port" . }}
+
+{{ if and (.Values.networkPolicy.enabled) (not .Values.networkPolicy.allowExternal) }}
+Note: Since NetworkPolicy is enabled, only pods with label {{ template "postgresql.fullname" . }}-client=true" will be able to connect to this PostgreSQL cluster.
+{{- end }}
+
+To connect to your database from outside the cluster execute the following commands:
+
+{{- if contains "NodePort" .Values.service.type }}
+
+    export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+    export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ template "postgresql.fullname" . }})
+    {{ if (include "postgresql.password" . )  }}PGPASSWORD="$POSTGRES_PASSWORD" {{ end }}psql --host $NODE_IP --port $NODE_PORT -U {{ .Values.postgresqlUsername }} -d {{- if .Values.postgresqlDatabase }} {{ .Values.postgresqlDatabase }}{{- else }} postgres{{- end }}
+
+{{- else if contains "LoadBalancer" .Values.service.type }}
+
+  NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+        Watch the status with: 'kubectl get svc --namespace {{ .Release.Namespace }} -w {{ template "postgresql.fullname" . }}'
+
+    export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ template "postgresql.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+    {{ if (include "postgresql.password" . ) }}PGPASSWORD="$POSTGRES_PASSWORD" {{ end }}psql --host $SERVICE_IP --port {{ template "postgresql.port" . }} -U {{ .Values.postgresqlUsername }} -d {{- if .Values.postgresqlDatabase }} {{ .Values.postgresqlDatabase }}{{- else }} postgres{{- end }}
+
+{{- else if contains "ClusterIP" .Values.service.type }}
+
+    kubectl port-forward --namespace {{ .Release.Namespace }} svc/{{ template "postgresql.fullname" . }} {{ template "postgresql.port" . }}:{{ template "postgresql.port" . }} &
+    {{ if (include "postgresql.password" . ) }}PGPASSWORD="$POSTGRES_PASSWORD" {{ end }}psql --host 127.0.0.1 -U {{ .Values.postgresqlUsername }} -d {{- if .Values.postgresqlDatabase }} {{ .Values.postgresqlDatabase }}{{- else }} postgres{{- end }} -p {{ template "postgresql.port" . }}
+
+{{- end }}
+
+{{- include "postgresql.validateValues" . -}}
+
+{{- if and (contains "bitnami/" .Values.image.repository) (not (.Values.image.tag | toString | regexFind "-r\\d+$|sha256:")) }}
+
+WARNING: Rolling tag detected ({{ .Values.image.repository }}:{{ .Values.image.tag }}), please note that it is strongly recommended to avoid using rolling tags in a production environment.
++info https://docs.bitnami.com/containers/how-to/understand-rolling-tags-containers/
+
+{{- end }}