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Merge pull request #667 from bogdando/fix_dns

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Rework DNS stack to meet hostnet pods needs
This commit is contained in:
Bogdan Dobrelya
2016-12-12 21:38:13 +01:00
committed by GitHub
parent 88f3b86410 f52ed9f91e
commit 4e721bfd9d
8 changed files with 185 additions and 138 deletions
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docs/dns-stack.md
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@@ -38,6 +38,17 @@ or `8.8.8.8`. And domain is set to the default ``dns_domain`` value as well.
Later, the nameservers will be reconfigured to the DNS service IP that Kargo
configures for K8s cluster.
Also note, existing records will be purged from the `/etc/resolv.conf`,
including base/head/cloud-init config files and those that come from dhclient.
This is required for hostnet pods networking and for [kubelet to not exceed search domains
limits](https://github.com/kubernetes/kubernetes/issues/9229).
New search, nameserver records and options will be defined from the aforementioned vars:
* Via resolvconf's head file, if resolvconf installed.
* Via dhclient's DNS update hook.
* Via cloud-init (CoreOS only).
* Statically in the `/etc/resolv.conf`, if none of above is applicable.
DNS configuration details
-------------------------