CI: deploy OpenSearch 1.x instead of Elasticsearch

Change DevStack plugin to deploy OpenSearch 1.x instead of Elasticsearch
when using the elasticsearch storage driver. This is in preparation for
supporting OpenSearch instead of Elasticsearch. Note that CloudKitty
does not work with OpenSearch 2.x yet, likely due to the removal of
mapping types [1].

[1] https://opensearch.org/docs/2.0/breaking-changes/#remove-mapping-types-parameter

Change-Id: I572cba384a9a16ee2bbfe07b5c316ed5abbb5681
(cherry picked from commit 5fdb65b)

Author: priteau

devstack/plugin.sh

@@ -301,27 +301,20 @@ function install_influx {
     sudo systemctl start influxdb || sudo systemctl restart influxdb
 }
 
-function install_elasticsearch_ubuntu {
-    sudo apt install -qy openjdk-8-jre
-    local elasticsearch_file=$(get_extra_file https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.8.3.deb)
-    sudo dpkg -i --skip-same-version ${elasticsearch_file}
-}
-
-function install_elasticsearch_fedora {
-    sudo yum install -y java-1.8.0-openjdk
-    local elasticsearch_file=$(get_extra_file https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.8.3.rpm)
-    sudo yum localinstall -y ${elasticsearch_file}
-}
-
-function install_elasticsearch {
-    if is_ubuntu; then
-        install_elasticsearch_ubuntu
-    elif is_fedora; then
-        install_elasticsearch_fedora
-    else
-        die $LINENO "Distribution must be Debian or Fedora-based"
-    fi
-    sudo systemctl start elasticsearch || sudo systemctl restart elasticsearch
+function install_opensearch {
+    OPENSEARCH_HOME=/usr/share/opensearch
+    local opensearch_file=$(get_extra_file "https://artifacts.opensearch.org/releases/bundle/opensearch/1.3.6/opensearch-1.3.6-linux-x64.tar.gz")
+    sudo mkdir -p $OPENSEARCH_HOME
+    sudo tar -xzpf ${opensearch_file} -C $OPENSEARCH_HOME --strip-components=1
+    sudo mkdir -p $OPENSEARCH_HOME/data /var/log/opensearch
+    sudo chown -R $STACK_USER $OPENSEARCH_HOME /var/log/opensearch
+    cat - <<EOF | sudo tee $OPENSEARCH_HOME/config/opensearch.yml >/dev/null
+discovery.type: single-node
+path.data: /usr/share/opensearch/data
+path.logs: /var/log/opensearch
+plugins.security.disabled: true
+EOF
+    _run_under_systemd opensearch "$OPENSEARCH_HOME/bin/opensearch"
 }
 
 # install_cloudkitty() - Collect source and prepare
@@ -332,7 +325,7 @@ function install_cloudkitty {
     if [ $CLOUDKITTY_STORAGE_BACKEND == 'influxdb' ]; then
         install_influx
     elif [ $CLOUDKITTY_STORAGE_BACKEND == 'elasticsearch' ]; then
-        install_elasticsearch
+        install_opensearch
     fi
 }