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Added ability for Docker containers to set usage of dns settings along with hostNetwork is true

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Introduced chages:
   1. Re-writing of the resolv.conf file generated by docker.
      Cluster dns settings aren't passed anymore to docker api in all cases, not only for pods with host network:
      the resolver conf will be overwritten after infra-container creation to override docker's behaviour.

   2. Added new one dnsPolicy - 'ClusterFirstWithHostNet', so now there are:
      - ClusterFirstWithHostNet - use dns settings in all cases, i.e. with hostNet=true as well
      - ClusterFirst - use dns settings unless hostNetwork is true
      - Default

Fixes #17406
This commit is contained in:
vefimova
2016-08-05 03:19:17 -05:00
parent c7b53794d0
commit fc8a37ec86
31 changed files with 146 additions and 80 deletions
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2
api/openapi-spec/swagger.json
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@@ -39466,7 +39466,7 @@
}
},
"dnsPolicy": {
"description": "Set DNS policy for containers within the pod. One of 'ClusterFirst' or 'Default'. Defaults to \"ClusterFirst\".",
"description": "Set DNS policy for containers within the pod. One of 'ClusterFirstWithHostNet', 'ClusterFirst' or 'Default'. Defaults to \"ClusterFirst\". To have DNS options set along with hostNetwork, you have to specify DNS policy explicitly to 'ClusterFirstWithHostNet'.",
"type": "string"
},
"hostIPC": {