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Add support for running a nodelocal dns cache (#3861)

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* 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
This commit is contained in:
Thomas Nys
2018-12-10 17:28:03 -08:00
committed by Kubernetes Prow Robot
parent 7b674e0607
commit 3e3ee0aeb1
12 changed files with 223 additions and 0 deletions
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roles/kubernetes-apps/ansible/defaults/main.yml
+6
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@@ -8,6 +8,12 @@ dns_nodes_per_replica: 10
dns_cores_per_replica: 20
dns_prevent_single_point_failure: "{{ 'true' if dns_min_replicas|int > 1 else 'false' }}"
# nodelocaldns
nodelocaldns_cpu_requests: 100m
nodelocaldns_ip: 169.254.25.10
nodelocaldns_memory_limit: 170Mi
nodelocaldnsdns_memory_requests: 70Mi
# Netchecker
deploy_netchecker: false
netchecker_port: 31081