Add docker volume (#60)

* Add docker volume

1. Add local docker volume through override docker-compose
2. Default no volume mount

* Add comment for cached mode

* 1. Use default mysql images mysql:8.0.22
2. Remove from Docker.env
3. Open changes for mysql image tag using `MYSQL_IMAGE_TAG` environment variable

* Update README

* add named volume

Co-authored-by: Raghav2211 <[email protected]>

todo-app/README.md

@@ -59,4 +59,7 @@ docker build --build-arg JAR_FILE=build/libs/\*.jar --tag psi-todo:1.0.0 .
 ## Run ##
 ```bash
 docker-compose --env-file=env/<env>/Docker.env up -d
+#or 
+# Override default docker-compose configuration
+docker-compose --env-file=env/<env>/Docker.env -f docker-compose.yaml -f env/<env>/docker-compose-override.yml up -d
 ```

todo-app/docker-compose.yaml

@@ -1,7 +1,7 @@
 version: "3"
 services:
   psimysql:
-    image: ${MYSQL_IMAGE}
+    image: mysql:${MYSQL_IMAGE_TAG:-8.0.22}
     container_name: mysql
     ports:
       - 3306:3306

todo-app/env/ci/Docker.env

@@ -4,7 +4,6 @@
 PSI_TODO_IMAGE=psi-todo
 
 #Database variables
-MYSQL_IMAGE=mysql:8.0.22
 MYSQL_USER=root
 MYSQL_PASSWORD=root
 MYSQL_DATABASE=psi

todo-app/env/local/Docker.env

@@ -6,10 +6,11 @@ PSI_TODO_IMAGE=psi-todo:1.0.0
 PSI_TODO_STACK_IMAGE=localhost:5000/psi-todo 
 
 #Database variables
-MYSQL_IMAGE=mysql:8.0.22
 MYSQL_USER=root
 MYSQL_PASSWORD=root
 MYSQL_DATABASE=psi
+#MYSQL_DATA_SRC_PATH=
+MYSQL_DATA_DEST_PATH=/var/lib/mysql
 #BASIC_AUTH_ENABLE
 # if BASIC_AUTH_ENABLE=true [Default is false] then set below two variables
 #BASIC_AUTH_USERNAME= 

todo-app/env/local/docker-compose-override.yml

@@ -1,14 +1,15 @@
 version: "3"
 services:
   psimysql: 
-    deploy: 
-      placement: 
-        constraints: 
-          - "node.role == worker"
-  psitodoapp:
-    image: ${PSI_TODO_STACK_IMAGE}
-    deploy: 
-      replicas: ${PSI_TODO_REPLICA}
-      placement: 
-        constraints: 
-          - "node.role == worker" 
+    volumes: 
+      - mysql_data:${MYSQL_DATA_DEST_PATH}:cached   # Strong consistency is quite expensive, requiring coordination between all of a files writers to guarantee 
+                                                      # they don’t inappropriately clobber each other’s changes
+                                                      # So Relax consistency guarantees using `cached` mode (Don’t do this in production …)
+volumes:
+  mysql_data:
+    # To use below configuration for host path ensure MYSQL_DATA_SRC_PATH should exists
+    # driver: local
+    # driver_opts:
+    #   type: none
+    #   device: $PWD/${MYSQL_DATA_SRC_PATH} 
+    #   o: bind                                                      

todo-app/env/local/docker-stack-compose-override.yml

@@ -0,0 +1,14 @@
+version: "3"
+services:
+  psimysql: 
+    deploy: 
+      placement: 
+        constraints: 
+          - "node.role == worker"
+  psitodoapp:
+    image: ${PSI_TODO_STACK_IMAGE}
+    deploy: 
+      replicas: ${PSI_TODO_REPLICA}
+      placement: 
+        constraints: 
+          - "node.role == worker"