In some cases there is a problem resolving DNS from inside containers
running within Openshift.
Add the following to `/etc/docker/daemon.json`:
```
{ "insecure-registries": ["172.30.0.0/16"] }
```
If the problem remains try adding the following to
`/etc/docker/daemon.json`:
```
{"dns":
Hi guys,
I want to setup old cluster with calico plugin.
How could I configure it?
Is there any doc about this?
Thanks,
Jared
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