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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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docs/api-reference/extensions/v1beta1/definitions.html
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@@ -4359,7 +4359,7 @@ Populated by the system when a graceful deletion is requested. Read-only. More i
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">dnsPolicy</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Set DNS policy for containers within the pod. One of <em>ClusterFirst</em> or <em>Default</em>. Defaults to "ClusterFirst".</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Set DNS policy for containers within the pod. One of <em>ClusterFirstWithHostNet</em>, <em>ClusterFirst</em> or <em>Default</em>. Defaults to "ClusterFirst". To have DNS options set along with hostNetwork, you have to specify DNS policy explicitly to <em>ClusterFirstWithHostNet</em>.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">string</p></td>
<td class="tableblock halign-left valign-top"></td>