91 lines
2.1 KiB
Markdown
91 lines
2.1 KiB
Markdown
|
# CRI-O
|
||
|
|
||
|
[CRI-O] is a lightweight container runtime for Kubernetes.
|
||
|
|
Kubespray supports basic functionality for using CRI-O as the default container runtime in a cluster.
|
||
|
|
|
||
|
|
* Kubernetes supports CRI-O on v1.11.1 or later.
|
||
|
* etcd: configure either kubeadm managed etcd or host deployment
|
||
|
|
|
||
|
|
_To use the CRI-O container runtime set the following variables:_
|
||
|
|
|
||
|
## all/all.yml
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
download_container: false
|
||
|
|
skip_downloads: false
|
||
|
etcd_deployment_type: host # optionally kubeadm
|
||
|
|
```
|
||
|
|
|
||
|
## k8s_cluster/k8s_cluster.yml
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
container_manager: crio
|
||
|
|
```
|
||
|
|
|
||
|
|
## all/crio.yml
|
||
|
|
|
||
|
|
Enable docker hub registry mirrors
|
||
|
|
|
||
|
|
```yaml
|
||
|
crio_registries:
|
||
|
|
- prefix: docker.io
|
||
|
|
insecure: false
|
||
|
|
blocked: false
|
||
|
|
location: registry-1.docker.io
|
||
|
unqualified: false
|
||
|
|
mirrors:
|
||
|
|
- location: 192.168.100.100:5000
|
||
|
|
insecure: true
|
||
|
|
- location: mirror.gcr.io
|
||
|
|
insecure: false
|
||
|
|
```
|
||
|
|
|
||
|
|
[CRI-O]: https://cri-o.io/
|
||
|
|
||
|
The following is a method to enable insecure registries.
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
crio_insecure_registries:
|
||
|
|
- 10.0.0.2:5000
|
||
|
|
```
|
||
|
|
|
||
|
|
And you can config authentication for these registries after `crio_insecure_registries`.
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
crio_registry_auth:
|
||
|
|
- registry: 10.0.0.2:5000
|
||
|
|
username: user
|
||
|
|
password: pass
|
||
|
|
```
|
||
|
|
|
||
|
|
## Note about user namespaces
|
||
|
|
|
||
|
|
CRI-O has support for user namespaces. This feature is optional and can be enabled by setting the following two variables.
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
crio_runtimes:
|
||
|
|
- name: runc
|
||
|
|
path: /usr/bin/runc
|
||
|
|
type: oci
|
||
|
|
root: /run/runc
|
||
|
|
allowed_annotations:
|
||
|
|
- "io.kubernetes.cri-o.userns-mode"
|
||
|
|
|
||
|
|
crio_remap_enable: true
|
||
|
|
```
|
||
|
|
|
||
|
|
The `allowed_annotations` configures `crio.conf` accordingly.
|
||
|
|
|
||
|
|
The `crio_remap_enable` configures the `/etc/subuid` and `/etc/subgid` files to add an entry for the **containers** user.
|
||
|
|
By default, 16M uids and gids are reserved for user namespaces (256 pods * 65536 uids/gids) at the end of the uid/gid space.
|
||
|
|
||
|
|
## Optional : NRI
|
||
|
|
|
||
|
|
[Node Resource Interface](https://github.com/containerd/nri) (NRI) is disabled by default for the CRI-O. If you
|
||
|
|
are using CRI-O version v1.26.0 or above, then you can enable it with the
|
||
|
|
following configuration:
|
||
|
|
|
||
|
|
```yaml
|
||
|
|
nri_enabled: true
|
||
|
|
```
|