Migrate from elasticseach to opensearch

Elasticsearch service will be withdrawn from PaaS and replaced with opensearch.

.github/workflows/ci.yml

@@ -26,9 +26,9 @@ jobs:
           sudo sysctl -w fs.file-max=262144
           sudo sysctl -w vm.max_map_count=262144
 
-      - uses: getong/elasticsearch-action@v1.2
+      - uses: ankane/setup-opensearch@v1
         with:
-          elasticsearch version: '7.6.1'
+          opensearch-version: 1.2
           host port: 9200
           container port: 9200
           host node port: 9300

config/application.rb

@@ -58,7 +58,7 @@ class Application < Rails::Application
     config.filter_parameters << :password
     config.filter_parameters << :password_confirmation
 
-    config.elasticsearch = config_for(:elasticsearch)
+    config.elasticsearch = config_for(:opensearch)
 
     config.ssl_options = { hsts: { expires: 1.week } }
 

config/initializers/elasticsearch.rb

@@ -4,10 +4,10 @@
 
 if host.blank?
   vcap = JSON.parse(es_config[:vcap_services])
-  host = vcap.dig("elasticsearch", 0, "credentials", "uri")
+  host = vcap.dig("opensearch", 0, "credentials", "uri")
 end
 
-raise StandardError, "No elasticsearch environment variables found" if host.blank?
+raise StandardError, "No opensearch environment variables found" if host.blank?
 
 Elasticsearch::Model.client = Elasticsearch::Client.new(
   host: host,

integration-manifest.yml

@@ -15,5 +15,5 @@ applications:
     GOVUK_WEBSITE_ROOT: https://www.gov.uk
   services:
   - find-integration-secrets
-  - elasticsearch-7-integration
+  - opensearch-integration
   - logit-ssl-drain

production-manifest.yml

@@ -16,5 +16,5 @@ applications:
     GOVUK_WEBSITE_ROOT: https://www.gov.uk
   services:
   - find-production-secrets
-  - elasticsearch-7-production
+  - opensearch-production
   - logit-ssl-drain

staging-manifest.yml

@@ -16,5 +16,5 @@ applications:
     GOVUK_WEBSITE_ROOT: https://www.gov.uk
   services:
   - find-staging-secrets
-  - elasticsearch-7-staging
+  - opensearch-staging
   - logit-ssl-drain