[quickstart-es-default-1][10.44.0.5:9300][internal:cluster/coordination/join]",
"Caused by: org.elasticsearch.ElasticsearchException: java.io.IOException: No space left on device"
It looks like your quickstart-es-default-1 node has run out of disk space. You can add another nodeSet (or rename the existing one in the manifest) with a larger volumeClaimTemplate to request enough storage to suit your needs. See: https://www.elastic.co/guide/en/cloud-on-k8s/current/k8s-volume-claim-templates.html
Example of renaming a nodeSet to add more space: https://github.com/elastic/cloud-on-k8s/issues/325#issue-404254925