Support for RH-SSO upgrade with zero downtime (rolling upgrades)

Solution Unverified - Updated -

Issue

  • Does RH-SSO (Keycloak) support upgrade with zero downtime ?
  • As a Red Hat SSO administrator running SSO in an OpenShift cluster, I need to upgrade my SSO cluster to the latest micro version update while maintaining availability for existing clients. Is this possible ?
  • Support rolling upgrade with zero downtime in RH-SSO
  • Using Rolling deployment strategy with RH-SSO is resulting in the below error:

    01:40:03,870 ERROR [org.jgroups.protocols.TCP] (TransferQueueBundler,ejb,sso-prod-6-cgwdd) JGRP000029: sso-prod-6-cgwdd: failed sending message to sso-prod-5-4nhfv (66 bytes): java.net.SocketTimeoutException: connect timed out, headers: GMS: GmsHeader[VIEW_ACK], UNICAST3: DATA, seqno=76, TP: [cluster_name=ejb]
    

Environment

  • Red Hat Single Sign-On (RH-SSO)
    • 7.x

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