crun is a new container runtime written in C from Red Hat. They say it is newer smaller and faster than runc. It still too early to use it on production ,but It ‘s good to try.
- Download and install crun ( as of now is version 0.14.1)
- Edit cri-o configuration file: /etc/crio/crio.conf
update default_runtime from runc to crum
and add crio.runtime.runtimes.crun
default_runtime = "crun"[crio.runtime.runtimes.crun]
runtime_path = "/usr/bin/crun"
runtime_type = "oci"
runtime_root = "/run/crun"
3. Stop kubelet, stop crio then start crio and start kubelet.
4. Find system log for “Started libcrun container” message.
Aug 16 19:38:10 serv1 systemd[1]: Started crio-conmon-a146aff181fde817f292bd8bb86297ad02e2125a8a823865442a14ab475b51b3.scope.
Aug 16 19:38:10 serv1 systemd[1]: Started libcrun container.
Aug 16 19:38:12 serv1 systemd[1]: Started crio-conmon-1a76af11263f93a28e10d4c8c8be112e399f5205e4392d0730bc5117ac5bc154.scope.
Aug 16 19:38:12 serv1 systemd[1]: Started libcrun container.and conmon/crun pid
That’s all (for now).
edit1:
As of Apr 2, 2021 crun latest version is 0.19
