WIP Test with keycloak HA#9

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solsson wants to merge 24 commits intomasterfrom

keycloak-ha-config

Commits on Nov 7, 2016

Current from https://github.com/jboss-dockerfiles/keycloak/tree/master/server-mysql
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Adds the startup args from https://github.com/jboss-dockerfiles/keycloak/blob/master/server-ha-postgres/Dockerfile
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Pegs to a specific keycloak release
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Swaps keycloak's db to mysql (mariadb 10.1 for its bundled Galera support)
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Uses the equivalent keycloak-mysql as base
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Sets mysql default charset
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Giving up on haproxy because of https://github.com/dockerfile/haproxy/issues/3, no syslog please
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Disables UTF8 charset because it causes MYSQL error: Specified key was too long
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This project is about apache so use httpd for load balancing too
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Adds a second keycloak instance
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Reverts to a single instance to verify that it works with the load balancer
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Works behind balancer with keycloak-ha.xml too
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standalone.xml copied from keycloak-mysql:2.3.0.Final, for reference
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standalone-ha.xml copied from keycloak-mysql:2.3.0.Final
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Adds the second keycloak instance. Produces invalid redirects.
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Removes the http://mod-cluster.jboss.org/ subsystem, as we want our own load balancing (in kubernetes too)
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Removes UDP to try to enforce TCP (non multicast)
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Removes mping due to its mentioning of multicast
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Don't expose the management port, reached using ./bin/jboss-cli.sh
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Adds jgroups TCP ports, tough I have no clue what -fd is used for.
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Tries to configure according to http://jgroups.org/manual4/index.html#_tcp, though original conf clearly matches:
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Switches from udp to tcp for jgroups, I think
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Revert "Tries to configure according to http://jgroups.org/manual4/index.html#_tcp, though original conf clearly matches:"
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Sadly initial_hosts only support IP addresses. With hostnames it fails with:
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