Updating the docker bridge for Rancher managed clusters

Wed, 20 Nov 2019 13:18:00 +0000

The docker0 bridge network has a default IP range of 172.17.0.0/16 (with an additional docker-sys bridge for system-docker using 172.18.0.0/16 by default on RancherOS). These ranges will be routed to these interfaces, per the below example of the route output. If the range(s) overlap with the internal IP space usage in your own network, the host will not be able to route packets to other hosts in your network that lie within these ranges. As a result you may wish to change the bridge range(s) to enable successful routing to hosts within these.

Persisting RancherOS state

Tue, 19 Nov 2019 21:05:00 +0000

Recently I set about installing RancherOS. This was just to have a look and see what use cases it might help with. I chose to install RancherOS to a VM. In my case, VMware workstation. A roadblock I hit was providing an SSH key to the cloud-config.yml file.

The roadblock specifically, how can I send a file to a system I don’t have a password or SSH key for?

This article covers, generating an SSH key, SSH access to live CD and installation to hard disk.

RancherOS on Support Tools

Updating the docker bridge for Rancher managed clusters

Persisting RancherOS state