Add custom MySQL DSN query params feature

- Introduce `DB_CUSTOM_PARAMS` in `configmap.yaml`.
- Enhance `DB_URL` in `deployments.yaml` to include custom params.
- Define `mysql.extraParams` in `values.yaml` for configuration.

Signed-off-by: kahirokunn <okinakahiro@gmail.com>

Author: kahirokunn

charts/devlake/templates/configmap.yaml

@@ -32,4 +32,5 @@ data:
   DB_CHARSET: "utf8mb4"
   DB_PARSE_TIME: "True"
   DB_LOCATION: "{{ .Values.commonEnvs.TZ }}"
+  DB_CUSTOM_PARAMS: "{{ .Values.mysql.extraParams }}"
 {{- end }}

charts/devlake/templates/deployments.yaml

@@ -199,7 +199,7 @@ spec:
               value: "{{ .Values.lake.port }}"
             {{- if (eq .Values.option.database "mysql") }}
             - name: DB_URL
-              value: "mysql://$(MYSQL_USER):$(MYSQL_PASSWORD)@$(MYSQL_SERVER):$(MYSQL_PORT)/$(MYSQL_DATABASE)?charset=$(DB_CHARSET)&parseTime=$(DB_PARSE_TIME)&loc=$(DB_LOCATION)"
+              value: "mysql://$(MYSQL_USER):$(MYSQL_PASSWORD)@$(MYSQL_SERVER):$(MYSQL_PORT)/$(MYSQL_DATABASE)?charset=$(DB_CHARSET)&parseTime=$(DB_PARSE_TIME)&loc=$(DB_LOCATION){{ .Values.mysql.extraParams }}"
             {{- end }}
             {{- range $key1, $value1 := .Values.lake.envs }}
             - name: "{{ tpl $key1 $ }}"

charts/devlake/values.yaml

@@ -47,6 +47,11 @@ mysql:
   # the database for devlake
   database: lake
 
+  # extra MySQL DSN query params appended to DB_URL.
+  # Note: include a leading '&' yourself. Empty string means no change.
+  # example: "&tls=skip-verify" or "&tls=skip-verify&autocommit=true"
+  extraParams: ""
+
   # root password for mysql, only used when use_external=false
   rootPassword: admin