k8s-sig-cluster-lifecycleawskubesprayhigh-availabilityansiblekubernetes-clustergcekubernetesbare-metal
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75 lines
2.5 KiB
75 lines
2.5 KiB
---
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- name: set dns server for docker
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set_fact:
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docker_dns_servers: |-
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{%- if dns_mode in ['kubedns', 'coredns'] -%}
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{{ [ skydns_server ] }}
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{%- elif dns_mode == 'coredns_dual' -%}
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{{ [ skydns_server ] + [ skydns_server_secondary ] }}
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{%- elif dns_mode == 'dnsmasq_kubedns' -%}
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{{ [ dnsmasq_dns_server ] }}
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{%- elif dns_mode == 'manual' -%}
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{{ [ manual_dns_server ] }}
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{%- endif -%}
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- name: set base docker dns facts
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set_fact:
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docker_dns_search_domains:
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- 'default.svc.{{ dns_domain }}'
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- 'svc.{{ dns_domain }}'
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docker_dns_options:
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- ndots:{{ ndots }}
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- timeout:2
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- attempts:2
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- name: add upstream dns servers (only when dnsmasq is not used)
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set_fact:
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docker_dns_servers: "{{ docker_dns_servers + upstream_dns_servers|default([]) }}"
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when: dns_mode in ['kubedns', 'coredns', 'coredns_dual']
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- name: add global searchdomains
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set_fact:
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docker_dns_search_domains: "{{ docker_dns_search_domains + searchdomains|default([]) }}"
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- name: check system nameservers
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shell: grep "^nameserver" /etc/resolv.conf | sed 's/^nameserver\s*//'
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changed_when: False
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register: system_nameservers
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check_mode: no
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- name: check system search domains
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shell: grep "^search" /etc/resolv.conf | sed 's/^search\s*//'
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changed_when: False
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register: system_search_domains
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check_mode: no
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- name: add system nameservers to docker options
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set_fact:
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docker_dns_servers: "{{ docker_dns_servers | union(system_nameservers.stdout_lines) | unique }}"
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when: system_nameservers.stdout != ""
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- name: add system search domains to docker options
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set_fact:
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docker_dns_search_domains: "{{ docker_dns_search_domains | union(system_search_domains.stdout.split()|default([])) | unique }}"
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when: system_search_domains.stdout != ""
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- name: check number of nameservers
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fail:
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msg: "Too many nameservers. You can relax this check by set docker_dns_servers_strict=false in all.yml and we will only use the first 3."
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when: docker_dns_servers|length > 3 and docker_dns_servers_strict|bool
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- name: rtrim number of nameservers to 3
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set_fact:
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docker_dns_servers: "{{ docker_dns_servers[0:3] }}"
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when: docker_dns_servers|length > 3 and not docker_dns_servers_strict|bool
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- name: check number of search domains
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fail:
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msg: "Too many search domains"
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when: docker_dns_search_domains|length > 6
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- name: check length of search domains
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fail:
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msg: "Search domains exceeded limit of 256 characters"
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when: docker_dns_search_domains|join(' ')|length > 256
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