I use ECS (Elastic Cloud on Kubernetes) with Azure Kubernetes service. ECS version 1.2.1
One Elasticsearch node (in a single pod) + one Kibana node.
I need to update Elasticsearch version from 7.9 to 7.10.
I have updated Elasticsearch version in yml file and run the command:
kubectl apply -f elasticsearch.yamlBut it was not updated. Still the old Elasticsearch is running in the same pod.
How to update Elasticsearch? Will the data be lost?
Problem is solved. I have added one extra VM to the k8s cluster and operator upgraded the Elasticsearch. It looks like there where not enough resources in the cluster to run the update. I have added one extra Elasticsearch pod as well. Perhaps upgrade is just not working with a single Elasticsearch pod.