- Dec 09, 2016
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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:
Bogdan Dobrelya <bdobrelia@mirantis.com>
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- Sep 27, 2016
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Bogdan Dobrelya authored
* Add a var for ndots (default 5) and put it hosts' /etc/resolv.conf. * Poke kube dns container image to v1.7 * In order to apply changes to kubelet, notify it to be restarted on changes made to /etc/resolv.conf. Ignore errors as the kubelet may yet to be present up to the moment of the notification being processed. * Remove unnecessary kubelet restart for master role as the node role ensures it is up and running. Notify master static pods waiters for apiserver, scheduler, controller-manager instead. Signed-off-by:
Bogdan Dobrelya <bdobrelia@mirantis.com>
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- Sep 26, 2016
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Bogdan Dobrelya authored
Signed-off-by:
Bogdan Dobrelya <bdobrelia@mirantis.com>
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- Sep 23, 2016
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Bogdan Dobrelya authored
- Update docs and a drawing to clarify DNS setup. - Change order of nameservers placement to match changes in https://github.com/kubespray/kargo/pull/501 Signed-off-by:
Bogdan Dobrelya <bdobrelia@mirantis.com>
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Bogdan Dobrelya authored
Change additional dnsmasq opts: - Adjust caching size and TTL - Disable resolve conf to not create loops - Change dnsPolicy to default (similarly to kubedns's dnsmasq). The ClusterFirst should not be used to not create loops - Disable negative NXDOMAIN replies to be cached - Make its very installation as optional step (enabled by default). If you don't want more than 3 DNS servers, including 1 for K8s, disable it. - Add docs and a drawing to clarify DNS setup. - Fix stdout logs for dnsmasq/kubedns app configs - Add missed notifies to resolvconf -u handler - Fix idempotency of resolvconf head file changes Signed-off-by:
Bogdan Dobrelya <bdobrelia@mirantis.com>
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