[Backport 1.x] Scope discovery-ec2 IMDS lookups to this cluster forma…

…tion. (#70)

Signed-off-by: dblock <dblock@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

lib/infra/infra-stack.ts

@@ -425,6 +425,10 @@ export class InfraStack extends Stack {
       const baseConfig: any = load(readFileSync(`${configFileDir}/multi-node-base-config.yml`, 'utf-8'));
 
       baseConfig['cluster.name'] = `${scope.stackName}-${scope.account}-${scope.region}`;
+
+      // use discovery-ec2 to find manager nodes by querying IMDS
+      baseConfig['discovery.ec2.tag.Name'] = `${scope.stackName}/seedNodeAsg,${scope.stackName}/managerNodeAsg`;
+
       const commonConfig = dump(baseConfig).toString();
       cfnInitConfig.push(InitCommand.shellCommand(`set -ex;cd opensearch; echo "${commonConfig}" > config/opensearch.yml`,
         {

lib/opensearch-config/multi-node-base-config.yml

@@ -1,5 +1,4 @@
 cluster.name: "opensearch"
 cluster.initial_master_nodes: ["seed"]
 discovery.seed_providers: ec2
-discovery.ec2.tag.role: manager
 network.host: 0.0.0.0