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clean pre-submit checks (#2367)

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Chris O'Haver
2018-12-05 16:20:20 -05:00
committed by corbot[bot]
parent 59a49c5ff7
commit 9a393ac5c8
1 changed files with 3 additions and 3 deletions
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plugin/loop/README.md
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@@ -71,13 +71,13 @@ A common cause of forwarding loops in Kubernetes clusters is an interaction with
on the host node (e.g. `systemd-resolved`). For example, in certain configurations `systemd-resolved` will on the host node (e.g. `systemd-resolved`). For example, in certain configurations `systemd-resolved` will
put the loopback address `127.0.0.53` as a nameserver into `/etc/resolv.conf`. Kubernetes (via `kubelet`) by default put the loopback address `127.0.0.53` as a nameserver into `/etc/resolv.conf`. Kubernetes (via `kubelet`) by default
will pass this `/etc/resolv/conf` file to all Pods using the `default` dnsPolicy rendering them will pass this `/etc/resolv/conf` file to all Pods using the `default` dnsPolicy rendering them
unable to make DNS lookups (this includes CoreDNS Pods). CoreDNS uses this `/etc/resolv.conf` unable to make DNS lookups (this includes CoreDNS Pods). CoreDNS uses this `/etc/resolv.conf`
as a list of upstreams to proxy/forward requests to. Since it contains a loopback address, CoreDNS ends up forwarding as a list of upstreams to proxy/forward requests to. Since it contains a loopback address, CoreDNS ends up forwarding
requests to itself. requests to itself.
There are many ways to work around this issue, some are listed here: There are many ways to work around this issue, some are listed here:
* Add the following to `kubelet`: `--resolv-conf <path-to-your-real-resolv-conf-file>`. Your "real" * Add the following to `kubelet`: `--resolv-conf <path-to-your-real-resolv-conf-file>`. Your "real"
`resolv.conf` is the one that contains the actual IPs of your upstream servers, and no local/loopback address. `resolv.conf` is the one that contains the actual IPs of your upstream servers, and no local/loopback address.
This flag tells `kubelet` to pass an alternate `resolv.conf` to Pods. For systems using `systemd-resolved`, This flag tells `kubelet` to pass an alternate `resolv.conf` to Pods. For systems using `systemd-resolved`,
`/run/systemd/resolve/resolv.conf` is typically the location of the "real" `resolv.conf`, `/run/systemd/resolve/resolv.conf` is typically the location of the "real" `resolv.conf`,