[keycloak-user] Accessing JGroups ports in Docker keycloak-ha-postgres

[Staffan]

After lots of experimentation, I found keycloak-mysql to be more useful
than keycloak-ha-postgres for HA in Kubernetes. See
https://github.com/jboss-dockerfiles/keycloak/pull/62

There is some more background in the JGroups mailing list thread "Expose
JGroups ports in Docker keycloak-ha-postgres".

/Staffan

On Tue, Nov 8, 2016 at 11:29 AM, Staffan <solsson at gmail.com> wrote:

> Hi,
>
> I've tried in different docker environments (compose, kubernetes,
> standalone) to get a HA setup running using https://hub.docker.com/r/
> jboss/keycloak-ha-postgres/.
>
> Keycloak nodes start all right, but are unaware of each other. Curiously I
> fail to reach the JGroups ports from any other container or host system.
>
> When I try -Djboss.bind.address.private=0.0.0.0 there's an error during
> startup:
>
> MSC000001: Failed to start service jboss.jgroups.channel.ee:
> org.jboss.msc.service.StartException in service jboss.jgroups.channel.ee:
> java.security.PrivilegedActionException: java.net.BindException: [UDP] /
> 0.0.0.0 is not a valid address on any local network interface
>     at org.wildfly.clustering.jgroups.spi.service.ChannelBuilder.start(
> ChannelBuilder.java:80)
> Caused by: java.security.PrivilegedActionException:
> java.net.BindException: [UDP] /0.0.0.0 is not a valid address on any
> local network interface
>     at org.wildfly.security.manager.WildFlySecurityManager.doChecked(
> WildFlySecurityManager.java:640)
> Caused by: java.net.BindException: [UDP] /0.0.0.0 is not a valid address
> on any local network interface
>     at org.jgroups.util.Util.checkIfValidAddress(Util.java:3522)
>
> ... or if I switch to stack="tcp" in the jgroups subsystem:
>
> MSC000001: Failed to start service jboss.jgroups.channel.ee:
> org.jboss.msc.service.StartException in service jboss.jgroups.channel.ee:
> java.security.PrivilegedActionException: java.net.BindException: [TCP] /
> 0.0.0.0 is not a valid address on any local network interface
>
> I guess this is a generic Wildfly topic, but I'm curious how the official
> Keycloak docker containers are tested. In a docker context, the only two
> interfaces I can bind to are 0.0.0.0 and 127.0.0.1.
>
> regards
> Staffan Olsson
>
>
>