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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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9
roles/kubespray-defaults/defaults/main.yaml
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@@ -55,7 +55,7 @@ epel_enabled: false
cluster_name: cluster.local
# Subdomains of DNS domain to be resolved via /etc/resolv.conf for hostnet pods
ndots: 2
# Can be dnsmasq_kubedns, kubedns, manual or none
# Can be coredns, coredns_dual, manual, or none
dns_mode: coredns
# Enable nodelocal dns cache
@@ -69,20 +69,19 @@ manual_dns_server: ""
resolvconf_mode: docker_dns
# Deploy netchecker app to verify DNS resolve as an HTTP service
deploy_netchecker: false
# Ip address of the kubernetes skydns service
# Ip address of the kubernetes DNS service (called skydns for historical reasons)
skydns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(3)|ipaddr('address') }}"
skydns_server_secondary: "{{ kube_service_addresses|ipaddr('net')|ipaddr(4)|ipaddr('address') }}"
dnsmasq_dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address') }}"
dns_domain: "{{ cluster_name }}"
kube_dns_servers:
kubedns: ["{{skydns_server}}"]
coredns: ["{{skydns_server}}"]
coredns_dual: "{{[skydns_server] + [ skydns_server_secondary ]}}"
manual: ["{{manual_dns_server}}"]
dnsmasq_kubedns: ["{{dnsmasq_dns_server}}"]
dns_servers: "{{kube_dns_servers[dns_mode]}}"
# Kubernetes configuration dirs and system namespace.
# Those are where all the additional config stuff goes
# the kubernetes normally puts in /srv/kubernetes.