migration script added (#2914)

deploy/selfhost/migration-0.13-0.14.sh

@@ -0,0 +1,118 @@
+#!/bin/bash
+
+echo '
+******************************************************************
+
+This script is solely for the migration purpose only. 
+This is a 1 time migration of volume data from v0.13.2 => v0.14.x
+
+Assumption: 
+1. Postgres data volume name ends with _pgdata
+2. Minio data volume name ends with _uploads
+3. Redis data volume name ends with _redisdata
+
+Any changes to this script can break the migration. 
+
+Before you proceed, make sure you run the below command
+to know the docker volumes
+
+docker volume ls -q | grep -i "_pgdata"
+docker volume ls -q | grep -i "_uploads"
+docker volume ls -q | grep -i "_redisdata"
+
+*******************************************************
+'
+
+DOWNLOAD_FOL=./download
+rm -rf ${DOWNLOAD_FOL}
+mkdir -p ${DOWNLOAD_FOL}
+
+function volumeExists {
+  if [ "$(docker volume ls -f name=$1 | awk '{print $NF}' | grep -E '^'$1'$')" ]; then
+    return 0
+  else
+    return 1
+  fi
+}
+
+function readPrefixes(){
+    echo ''
+    echo 'Given below list of REDIS volumes, identify the prefix of source and destination volumes leaving "_redisdata" '
+    echo '---------------------'
+    docker volume ls -q | grep -i "_redisdata"
+    echo ''
+    
+    read -p "Provide the Source Volume Prefix : " SRC_VOL_PREFIX
+    until [ "$SRC_VOL_PREFIX"  ]; do
+        read -p "Provide the Source Volume Prefix : " SRC_VOL_PREFIX
+    done
+
+    read -p "Provide the Destination Volume Prefix : " DEST_VOL_PREFIX
+    until [ "$DEST_VOL_PREFIX"  ]; do
+        read -p "Provide the Source Volume Prefix : " DEST_VOL_PREFIX
+    done
+
+    echo ''
+    echo 'Prefix Provided '
+    echo "  Source : ${SRC_VOL_PREFIX}"
+    echo "  Destination : ${DEST_VOL_PREFIX}"
+    echo '---------------------------------------'
+}
+
+function migrate(){
+
+    SRC_VOLUME=${SRC_VOL_PREFIX}_${VOL_NAME_SUFFIX}
+    DEST_VOLUME=${DEST_VOL_PREFIX}_${VOL_NAME_SUFFIX}
+
+    if volumeExists $SRC_VOLUME; then
+        if volumeExists $DEST_VOLUME; then
+            GOOD_TO_GO=1
+        else 
+            echo "Destination Volume '$DEST_VOLUME' does not exist"
+            echo ''
+        fi
+    else
+        echo "Source Volume '$SRC_VOLUME' does not exist"
+        echo ''
+    fi
+
+    if [ $GOOD_TO_GO = 1 ]; then
+
+        echo "MIGRATING ${VOL_NAME_SUFFIX} FROM ${SRC_VOLUME} => ${DEST_VOLUME}"
+    
+        TEMP_CONTAINER=$(docker run -d -v $SRC_VOLUME:$CONTAINER_VOL_FOLDER busybox true)
+        docker cp -q $TEMP_CONTAINER:$CONTAINER_VOL_FOLDER ${DOWNLOAD_FOL}/${VOL_NAME_SUFFIX}
+        docker rm $TEMP_CONTAINER &> /dev/null
+        
+        TEMP_CONTAINER=$(docker run -d -v $DEST_VOLUME:$CONTAINER_VOL_FOLDER busybox true)
+        if [ "$VOL_NAME_SUFFIX" = "pgdata" ]; then
+            docker cp -q ${DOWNLOAD_FOL}/${VOL_NAME_SUFFIX} $TEMP_CONTAINER:$CONTAINER_VOL_FOLDER/_temp
+            docker run --rm -v $DEST_VOLUME:$CONTAINER_VOL_FOLDER \
+                    -e DATA_FOLDER="${CONTAINER_VOL_FOLDER}" \
+                    busybox /bin/sh -c 'cp -Rf $DATA_FOLDER/_temp/* $DATA_FOLDER '
+        else
+            docker cp -q ${DOWNLOAD_FOL}/${VOL_NAME_SUFFIX} $TEMP_CONTAINER:$CONTAINER_VOL_FOLDER   
+        fi
+        docker rm $TEMP_CONTAINER &> /dev/null
+
+        echo ''
+    fi
+}
+
+readPrefixes
+
+# MIGRATE DB
+CONTAINER_VOL_FOLDER=/var/lib/postgresql/data
+VOL_NAME_SUFFIX=pgdata
+migrate
+
+# MIGRATE REDIS
+CONTAINER_VOL_FOLDER=/data
+VOL_NAME_SUFFIX=redisdata
+migrate
+
+# MIGRATE MINIO
+CONTAINER_VOL_FOLDER=/export
+VOL_NAME_SUFFIX=uploads
+migrate
+