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Remove kubedns and dnsmasq. Move dns_late phase after apps (#4406)

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Both kubedns and dnsmasq modes are long not maintained.
We should run dns_late steps at the end because sshd
makes DNS lookups during Ansible run and has 2s timeouts
for each failed lookup trying to connect to coredns before
it is ready.
This commit is contained in:
Matthew Mosesohn
2019-04-01 22:32:34 +03:00
committed by Kubernetes Prow Robot
parent d71590bbd0
commit 5f12b7aedf
33 changed files with 37 additions and 837 deletions
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7
docs/vars.md
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@@ -59,8 +59,6 @@ following default cluster parameters:
overlap with kube_service_addresses.
* *kube_network_node_prefix* - Subnet allocated per-node for pod IPs. Remainin
bits in kube_pods_subnet dictates how many kube-nodes can be in cluster.
* *dns_setup* - Enables dnsmasq
* *dnsmasq_dns_server* - Cluster IP for dnsmasq (default is 10.233.0.2)
* *skydns_server* - Cluster IP for DNS (default is 10.233.0.3)
* *skydns_server_secondary* - Secondary Cluster IP for CoreDNS used with coredns_dual deployment (default is 10.233.0.4)
* *cloud_provider* - Enable extra Kubelet option if operating inside GCE or
@@ -84,15 +82,14 @@ and ``kube_pods_subnet``, for example from the ``172.18.0.0/16``.
#### DNS variables
By default, dnsmasq gets set up with 8.8.8.8 as an upstream DNS server and all
By default, hosts are set up with 8.8.8.8 as an upstream DNS server and all
other settings from your existing /etc/resolv.conf are lost. Set the following
variables to match your requirements.
* *upstream_dns_servers* - Array of upstream DNS servers configured on host in
addition to Kubespray deployed DNS
* *nameservers* - Array of DNS servers configured for use in dnsmasq
* *nameservers* - Array of DNS servers configured for use by hosts
* *searchdomains* - Array of up to 4 search domains
* *skip_dnsmasq* - Don't set up dnsmasq (use only KubeDNS)
For more information, see [DNS
Stack](https://github.com/kubernetes-sigs/kubespray/blob/master/docs/dns-stack.md).