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    • Bogdan Dobrelya's avatar
      Preconfigure DNS stack and docker early · a15d6267
      Bogdan Dobrelya authored
      
      
      In order to enable offline/intranet installation cases:
      * Move DNS/resolvconf configuration to preinstall role. Remove
        skip_dnsmasq_k8s var as not needed anymore.
      
      * Preconfigure DNS stack early, which may be the case when downloading
        artifacts from intranet repositories. Do not configure
        K8s DNS resolvers for hosts /etc/resolv.conf yet early (as they may be
        not existing).
      
      * Reconfigure K8s DNS resolvers for hosts only after kubedns/dnsmasq
        was set up and before K8s apps to be created.
      
      * Move docker install task to early stage as well and unbind it from the
        etcd role's specific install path. Fix external flannel dependency on
        docker role handlers. Also fix the docker restart handlers' steps
        ordering to match the expected sequence (the socket then the service).
      
      * Add default resolver fact, which is
        the cloud provider specific and remove hardcoded GCE resolver.
      
      * Reduce default ndots for hosts /etc/resolv.conf to 2. Multiple search
        domains combined with high ndots values lead to poor performance of
        DNS stack and make ansible workers to fail very often with the
        "Timeout (12s) waiting for privilege escalation prompt:" error.
      
      * Update docs.
      
      Signed-off-by: default avatarBogdan Dobrelya <bdobrelia@mirantis.com>
      a15d6267
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