[ongoing] elasticsearch migration script

docker/README.md

@@ -53,7 +53,7 @@ Choose one, depending on your budget, on the server's location, on the uptime gu
 You will need at least 2GB of addressable memory (RAM + swap) to install and use FabManager.
 We recommend 4 GB RAM for larger communities.
 
-On DigitalOcean, create a Droplet with One-click apps **"Docker on Ubuntu 16.04 LTS"**. 
+On DigitalOcean, create a Droplet with One-click apps **"Docker on Ubuntu 16.04 LTS"**.
 This way, Docker and Docker-compose are preinstalled.
 Choose a datacenter and set the hostname as your domain name.
 

scripts/elastic-upgrade.sh

@@ -0,0 +1,173 @@
+#!/usr/bin/env bash
+
+# 3 options:
+# - docker compose
+# - docker "simple"
+# - classic installation
+#   > macOS
+#   > ubuntu
+#   > debian
+
+
+config()
+{
+  FM_PATH=$(pwd)
+  read -rp "Is fab-manager installed at \"$FM_PATH\"? (y/n)" confirm </dev/tty
+  if [ "$confirm" = "y" ]
+  then
+    ES_HOST=$(cat "$FM_PATH/config/application.yml" | grep ELASTICSEARCH_HOST | awk '{print $2}')
+    ES_IP=$(getent hosts "$ES_HOST" | awk '{ print $1 }')
+  else
+    echo "Please run this script from the fab-manager's installation folder"
+    exit 1
+  fi
+}
+
+test_docker_compose()
+{
+  ls "$FM_PATH/docker-compose.yml"
+  if [[ $? = 0 ]]
+  then
+    docker-compose ps | grep elastic
+    if [[ $? = 0 ]]; then echo "DOCKER-COMPOSE"; fi
+  fi
+}
+
+test_docker()
+{
+  docker ps | grep elasticsearch:1.7
+  if [[ $? = 0 ]]
+  then
+    local containers=$(docker ps | grep elasticsearch:1.7)
+    docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(echo "$containers" | awk '{print $1}') | grep "$ES_IP"
+    if [[ $? = 0 ]]; then echo "DOCKER"; fi
+  fi
+}
+
+test_classic()
+{
+  if [[ "$ES_IP" = "127.0.0.1" || "$ES_IP" = "::1" ]]
+  then
+    whereis -b elasticsearch | grep "/"
+    if [[ $? = 0 ]]; then echo "CLASSIC"; fi
+  fi
+}
+
+test_running()
+{
+  local http_res=$(curl -I "$ES_HOST:9200" 2>/dev/null | head -n 1 | cut -d$' ' -f2)
+  if [ "$http_res" -eq 200 ]
+  then
+    echo "ONLINE"
+  else
+    echo "OFFLINE"
+  fi
+}
+
+detect_installation()
+{
+  echo "Detecting installation type..."
+
+  TYPE="NOT-FOUND"
+  local compose=$(test_docker_compose)
+  if [[ "$compose" = "DOCKER-COMPOSE" ]]
+  then
+    echo "Docker-compose installation detected."
+    TYPE="DOCKER-COMPOSE"
+  else
+    local docker=$(test_docker)
+    if [[ "$docker" = "DOCKER-COMPOSE" ]]
+    then
+    echo "Classical docker installation detected."
+      TYPE="DOCKER"
+    else
+      local classic=$(test_classic)
+      if [[ "$classic" = "CLASSIC" ]]
+      then
+        echo "Local installation detected on the host system."
+        TYPE="CLASSIC"
+      fi
+    fi
+  fi
+
+  if [[ "$TYPE" = "NOT-FOUND" ]]
+  then
+    echo "ElasticSearch 1.7 was not found on the current system, exiting..."
+    exit 2
+  else
+    echo "Detecting online status..."
+    if [[ "$TYPE" != "NOT-FOUND" ]]
+    then
+        STATUS=$(test_running)
+    fi
+  fi
+}
+
+upgrade_compose()
+{
+  echo "Upgrading docker-compose installation..."
+  docker-compose stop elasticsearch
+  docker-compose rm -f elasticsearch
+  sed -i.bak s/image: elasticsearch:1.7/image: elasticsearch:2.4/g "$FM_PATH/docker-compose.yml"
+  docker-compose pull
+  docker-compose up -d
+  sleep 10
+  STATUS=$(test_running)
+  if [[ "$STATUS" = "ONLINE" ]]; then
+    echo "Migration to elastic 2.4 was successful."
+  else
+    echo "Unable to find an active ElasticSearch instance, something may have went wrong, exiting..."
+    exit 4
+  fi
+}
+
+upgrade_docker()
+{
+  echo "Upgrading docker installation..."
+  local containers=$(docker ps | grep elasticsearch:1.7)
+  # get container id
+  local id=$(docker inspect -f '{{.Id}} {{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(echo "$containers" | awk '{print $1}') | grep "$ES_IP" | awk '{print $1}')
+  # get container name
+  local name=$(docker inspect -f '{{.Name}}' "$id" | sed s:^/::g)
+  # get container network name
+  local network=$(docker inspect -f '{{.NetworkSettings.Networks}}' "$id" | sed)
+  # get container mapping to data folder
+  docker pull elasticsearch:2.4
+  docker run --restart=always  -d --name=fabmanager-elastic -v /home/core/fabmanager/elasticsearch:/usr/share/elasticsearch/data elasticsearch:2.4
+
+}
+
+
+upgrade_classic()
+{
+  echo "Automated upgrade of local installation is not supported."
+  echo "Please refer to your distribution instructions to install ElasticSearch 2.4"
+  echo "For more informations: https://www.elastic.co/guide/en/elasticsearch/reference/2.0/setup-upgrade.html"
+}
+
+start_upgrade()
+{
+  case "$TYPE" in
+  "DOCKER-COMPOSE")
+    upgrade_compose
+    ;;
+  "DOCKER")
+    upgrade_docker
+    ;;
+  "CLASSIC")
+    upgrade_classic
+    ;;
+  *)
+    echo "Unexpected ElasticSearch installation $TYPE"
+    exit 3
+  esac
+}
+
+upgrade_elastic()
+{
+  config
+  detect_installation
+  start_upgrade
+}
+
+upgrade_elastic "$@"