* Move most coredns templates to static files

This should speed up the task slightly

* yaml lint fixes

* Set cluster DNS correctly in case of nodelocal dns cache

* Pass in cluster_ip based on dns mode

* Disable nodelocaldns by default

* Fix syntax error

* Fix syntax issue

* Add nodelocadns ip to vars of node installation

* Change location of nodelocaldns_ip

* Try to remove newlines from jinja template

* Add debug for config file

* Move parameter logic outside of template

* Adapt templates after feedback

* Remove debugging

* Mount host /run/xtables.lock in nodelocaldns container

* fix typo in nodelocaldns daemonset manifest yml

* Add prometheus scrape annotation, updateStrategy and reduce termination grace period

* fix indentation

* actually fix it..

* Bump k8s-dns-node-cache tag to 1.15.1 (fixes https://github.com/kubernetes/dns/issues/282)

* Add support for running a nodelocal dns cache

After encountering dns issues in a cluster I was recently working on I
noticed Kubernetes 1.13 introduced support for running a nodelocal dns
cache.

I believe this can usefull for more people.

https://github.com/kubernetes/kubernetes/commit/73b548db06c5e293533344c5b6171e955eac9ff1
https://github.com/kubernetes/enhancements/blob/master/keps/sig-network/0030-nodelocal-dns-cache.md

* Add requested changes

* Add additional requested changes + documentation

* Add requested changes after review

* Replace incorrect variable

Metrics port is exposed through a service for CoreDNS but not for kube-dns.

* Upgrade kubernetes to v1.13.0

* Remove all precense of scheduler.alpha.kubernetes.io/critical-pod in templates

* Fix cert dir

* Use kubespray v2.8 as baseline for gitlab

* Remove variables defined in download role. Fixes #3799

* Cleanup some more variables

* Fix bad templating

* Minor fix

* Add dashboard to download role. Fixes #3736

* Fix DNS Autoscaler for coredns_dual deployment

* Fix templating

* Fix templating again

* Update DNS Autoscaler to latest

* Update CoreDNS to latest

* Update KubeDNS to latest

* Add KubeDNS config map

* Fix filename

* Add missing selector to DNS Autoscaler

* Add missing tolerations

* Enable AutoScaler for CoreDNS

* Only use one template for dns autoscaler

* Rename a few variables for replicas and minimum pods

* Rename a few variables for replicas and minimum pods

* Remove replicas to make autoscale work

* Cleanup kubedns-autoscaler as it has been renamed

* Revert netchecker image and version

* Create namespace for netchecker

* Remove extra slashes

* Apply linux node selector to coreDNS deployment

* Remove comment before linux node selector on manifests

* mend

* failed

* version_compare

* succeeded

* skipped

* success

* version_compare becomes version since ansible 2.5

* ansible minimal version updated in doc and spec

* last version_compare

* Update CoreDNS templates to newest version

* Add watch to ClusterRole. Fixes #3460

* Fix DNS loop when resolvconf_mode is set to host_resolvconf

* Make sure upstream_dns_servers is defined when using resolvconf_mode == 'host_resolvconf'

* Only set upstream dns servers on KubeDNS and CoreDNS if they are defined

* Only set upstream dns servers on KubeDNS and CoreDNS if they are defined

* Changes to assign pod priority to kube components.

* Removed the boolean flag pod_priority_assignment

* Created new priorityclass k8s-cluster-critical

* Created new priorityclass k8s-cluster-critical

* Fixed the trailing spaces

* Fixed the trailing spaces

* Added kube version check while creating Priority Class k8s-cluster-critical

* Moved k8s-cluster-critical.yml

* Moved k8s-cluster-critical.yml to kube_config_dir

ensure there is pin priority for docker package to avoid upgrade of docker to incompatible version

remove empty when line

ensure there is pin priority for docker package to avoid upgrade of docker to incompatible version

force kubeadm upgrade due to failure without --force flag

ensure there is pin priority for docker package to avoid upgrade of docker to incompatible version

added nodeSelector to have compatibility with hybrid cluster with win nodes, also fix for download with missing container type

fixes in syntax and LF for newline in files

fix on yamllint check

ensure there is pin priority for docker package to avoid upgrade of docker to incompatible version

some cleanup for innecesary lines

remove conditions for nodeselector

It prevents DNS loops when host's DNS server is a localhost DNS server,
or when DNS server of cluster is also added as an upstream DNS server

* kubedns & kubedns-autoscaler: Stick to master nodes.

 - Tolerate only master nodes and not any NoSchedule taint
 - Pods are on different nodes
 - Pods are required to be on a master node.

* kubedns: use soft nodeAffinity.

Prefer to be on a master node, don't require.

* coredns: Stick to (different) master nodes.

     - Pods are on different nodes
     - Pods are preferred to be on a master node.

Using official image from mirantis at dockerhub.

Kubernetes makes this namespace automatically, so there is
no need for kubespray to manage it.

Added CoreDNS to downloads

Updated with labels. Should now work without RBAC too

Fix DNS settings on hosts

Rename CoreDNS service from kube-dns to coredns

Add rotate based on http://edgeofsanity.net/rant/2017/12/20/systemd-resolved-is-broken.html

Updated docs with CoreDNS info

Added labels and fixed minor settings from official yaml file: https://github.com/kubernetes/kubernetes/blob/release-1.9/cluster/addons/dns/coredns.yaml.sed

Added a secondary deployment and secondary service ip. This is to mitigate dns timeouts and create high resitency for failures. See discussion at 'https://github.com/coreos/coreos-kubernetes/issues/641#issuecomment-281174806'

Set dns list correct. Thanks to @whereismyjetpack

Only download KubeDNS or CoreDNS if selected

Move dns cleanup to its own file and import tasks based on dns mode

Fix install of KubeDNS when dnsmask_kubedns mode is selected

Add new dns option coredns_dual for dual stack deployment. Added variable to configure replicas deployed. Updated docs for dual stack deployment. Removed rotate option in resolv.conf.

Run DNS manifests for CoreDNS and KubeDNS

Set skydns servers on dual stack deployment

Use only one template for CoreDNS dual deployment

Set correct cluster ip for the dns server