Kubernetes 1.3.0 basic setup questions

Kubernetes
#21

Hi, not sure if this might be relevant, but I had a very similar issue as you’re describing. Here’s a snippet from my notes that helped (K8s v1.29):

To configure container runtime to use systemd cgroup driver, you should edit /etc/containerd/config.toml with runc set. In the documentation you can see the example setting:

 [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
   ...
   [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
     SystemdCgroup = true

HOWEVER, adding just that caused my containerd to fall in an endless crash-restart loop, preventing me from managing the cluster altogether.
The error message read something along the lines: The connection to the server :6443 was refused - did you specify the right host or port?

A solution that helped me prevent that from happening was including the following lines instead:

 version = 2
 [plugins]
   [plugins."io.containerd.grpc.v1.cri"]
    [plugins."io.containerd.grpc.v1.cri".containerd]
       [plugins."io.containerd.grpc.v1.cri".containerd.runtimes]
         [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
           runtime_type = "io.containerd.runc.v2"
           [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
             SystemdCgroup = true

After editing this configuration, make sure to run
sudo systemctl restart containerd

Once again, this process needs to be done for all of the nodes.

I can’t guarantee this will work for you, but it did for me.

#22

Outstanding, that did it. I am curious where you found that information.

The only line I was missing was the

runtime_type = “io.containerd.runc.v2”

I googled the heck out of it, was it somewhere in the k8s documentation?

Using my instructions and the conf.toml provided by dee2ess

version = 2
[plugins]
[plugins.“io.containerd.grpc.v1.cri”]
[plugins.“io.containerd.grpc.v1.cri”.containerd]
[plugins.“io.containerd.grpc.v1.cri”.containerd.runtimes]
[plugins.“io.containerd.grpc.v1.cri”.containerd.runtimes.runc]
runtime_type = “io.containerd.runc.v2”
[plugins.“io.containerd.grpc.v1.cri”.containerd.runtimes.runc.options]
SystemdCgroup = true

Together this will get k8s 3.0 in Oracle Linux 9 in VMware Workstation working. Probably any virtual environment like VirtualBox as well.

#23

@Alistair_KodeKloud Looks like these folks got a RedHat family distribution to run a version of your kubeadm install.