Fix etcd play to only run on non-k8s-cluster nodes

This decreases the time required to deploy a cluster with
3 nodes, but none are standalone etcd roles.

Copy hyperkube cni plugins optionally for calico deployment

upstreaming to k8s

Fix init scripts for etcd. Fixes #383

Fixes Ubuntu 14.04 deployment of etcd.

force fact check of all nodes first thing

OpenStack minor fix

Fix resolvconf executable discovery

If resolvconf was installed and then removed, the file
/etc/resolvconf/resolv.conf.d/head remains in the filesystem

- change discovery of 'resolvconf' executable to check if it
  can be located with 'which resolvconf' command or not.

Hyperkube from CoreOS now ships with all binaries required for
calico and flannel (but not weave). It simplifies deployment for
some network plugin scenarios to not download CNI images.

TODO: Optionally disable downloading calico to /opt/cni/bin

Collect ansible logs as artifacts

Extends https://github.com/kubespray/kargo/pull/406



Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Fix calico-node service unit

Add a diagnostic info collect playbook

Add option to disable ipv6 dns lookup

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

New variable disable_ipv6_dns in kubernetes/preinstall.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Check dnsmasq on first kube-node

kube-masters without kube-node role will not run
kube-proxy, and therefore can't check if dnsmasq
is running.

Fixes #368

Revert "Merge pull request #393 from bogdando/ci_changes"

This reverts commit 4662b41d, reversing
changes made to 4fb4ac12.

Improve systemd handling and stabilize docker

Add future docker versions

Fixes #390

Creating the unit using default settings early on
and then changing it during network_plugin section
leads to too many docker restarts and duplicated code.

Reversed Wants= dependence on docker.service so it does not
restart docker when reloading systemd

Consolidated all docker restart handlers.

Default version is still unchanged, but added docker versions 1.11 and 1.12

* Add for docker system units:
    ExecReload=/bin/kill -s HUP $MAINPID
    Delegate=yes
    KillMode=process.
* Add missed DOCKER_OPTIONS for calico/weave docker systemd unit.
* Change Requires= to a less strict and non-faily Wants=, add missing
  Wants= for After=.
* Align wants/after in a wat if Wants=foo, After= has foo as well.
* Make wants/after docker.service to ask for the docker.socket as well.
* Move "docker rm -f" commands from ExecStartPre= to ExecStopPost=.
  hooks to ensure non-destructive start attempts issued by Wants=.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Add CI test layouts

* Drop Trusty from test matrix
* Add extra cases to test separate roles deployment

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Fix weave deployment task names

Support --ipip option for calico pool

Add settable flannel image tag & image repo

Fix etcd restart and calico-node unit

Changed Wants=docker.service to docker.socket

Renamed handlers for reloading systemd to contain role in task name.