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  1. WildFly WIP
  2. WFWIP-652

it is not possible to switch dns_record_type to for dns.DNS_PING in images

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Details

    • Bug
    • Resolution: Unresolved
    • Blocker
    • OpenShift
    • None

    Description

      OpenShift 4.13 dual-stack cluster
      EAP 7.4.12 image from EAP7-1992 (details)

      Cluster network setup:

      Name:         cluster
      Namespace:    
      Labels:       <none>
      Annotations:  <none>
      API Version:  config.openshift.io/v1
      Kind:         Network
      Metadata:
        Creation Timestamp:  2023-08-02T12:11:49Z
        Generation:          2
        Managed Fields:
          API Version:  config.openshift.io/v1
          Fields Type:  FieldsV1
          fieldsV1:
            f:spec:
              f:clusterNetwork:
              f:externalIP:
                f:policy:
              f:networkType:
              f:serviceNetwork:
            f:status:
              f:clusterNetwork:
              f:clusterNetworkMTU:
              f:networkType:
              f:serviceNetwork:
          Manager:      cluster-network-operator/operconfig
          Operation:    Apply
          Time:         2023-08-02T12:13:17Z
          API Version:  config.openshift.io/v1
          Fields Type:  FieldsV1
          fieldsV1:
            f:spec:
              .:
              f:clusterNetwork:
              f:externalIP:
                .:
                f:policy:
              f:networkType:
              f:serviceNetwork:
            f:status:
          Manager:         cluster-bootstrap
          Operation:       Update
          Time:            2023-08-02T12:11:49Z
        Resource Version:  3099
        UID:               62d21fdc-767c-4cd6-a8e7-a440da32e610
      Spec:
        Cluster Network:
          Cidr:         10.128.0.0/14
          Host Prefix:  23
          Cidr:         fd00:10:128::/56
          Host Prefix:  64
        External IP:
          Policy:
        Network Type:  OVNKubernetes
        Service Network:
          172.122.0.0/16
          fd00:172:16::/112
      Status:
        Cluster Network:
          Cidr:               10.128.0.0/14
          Host Prefix:        23
          Cidr:               fd00:10:128::/56
          Host Prefix:        64
        Cluster Network MTU:  1400
        Network Type:         OVNKubernetes
        Service Network:
          172.122.0.0/16
          fd00:172:16::/112
      Events:  <none>
      

      Simple application built with SERVER_USE_IPV6=true

      DNS_PING configuration:

      JGROUPS_PING_PROTOCOL=dns.DNS_PING
      OPENSHIFT_DNS_PING_SERVICE_NAME=ping-service
      OPENSHIFT_DNS_PING_SERVICE_PORT=8888
      

      Servers don't form the cluster.

      from debug log, I can see that DNS_PING sends discovery requests only to IPv4

      14:48:14,748 TRACE [org.jgroups.protocols.dns.DefaultDNSResolver] (thread-4,null,eap-server-1-c82xm) resolving DNS query: ping-service of a type: A
      14:48:14,750 DEBUG [org.jgroups.protocols.dns.DNS_PING] (thread-4,null,eap-server-1-c82xm) eap-server-1-c82xm: entries collected from DNS (in 2 ms): [10.129.2.109:0, 10.131.0.6:0]
      14:48:14,751 DEBUG [org.jgroups.protocols.dns.DNS_PING] (thread-4,null,eap-server-1-c82xm) eap-server-1-c82xm: sending discovery requests to hosts [10.129.2.109:0, 10.131.0.6:0] on ports [7600 .. 7600]
      14:48:14,751 TRACE [org.jgroups.protocols.dns.DNS_PING] (thread-7,ee,eap-server-1-c82xm) eap-server-1-c82xm: sending discovery request to 10.131.0.6:7600
      14:48:14,751 TRACE [org.jgroups.protocols.dns.DNS_PING] (thread-5,null,eap-server-1-c82xm) eap-server-1-c82xm: sending discovery request to 10.129.2.109:7600
      

      DNS_PING allows switching dns_record_type but it is not possible in OpenShift images.

      https://github.com/belaban/JGroups/blob/master/src/org/jgroups/protocols/dns/DNS_PING.java#L34C23-L34C38
      https://github.com/wildfly/wildfly-cekit-modules/blob/main/jboss/container/wildfly/launch/jgroups/added/launch/ha.sh#L275

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            pferraro@redhat.com Paul Ferraro
            msimka@redhat.com Martin Simka
            Martin Simka Martin Simka
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            Dates

              Created:
              Updated: