131 lines
3.4 KiB
Markdown
131 lines
3.4 KiB
Markdown
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# Integrate kubenetes
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## Configuration
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1. Configure `isulad`
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Configure the `pod-sandbox-image` in `/etc/isulad/daemon.json`:
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```json
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"pod-sandbox-image": "my-pause:1.0.0"
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```
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Configure the `endpoint`of `isulad`:
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```json
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"hosts" : [
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"unix:///var/run/isulad.sock"
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]
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```
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if `hosts` is not configured, the default endpoint is `unix:///var/run/isulad.sock`.
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2. Restart `isulad`:
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```bash
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$ sudo systemctl restart isulad
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```
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3. Start `kubelet` based on the configuration or default value:
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```bash
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$ /usr/bin/bubelet
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--container-runtime-endpoint=unix:///var/run/isulad.sock
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--image-service-endpoint=unix:///var/run/isulad.sock
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--pod-infra-container-image=my-pause:1.0.0
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...
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```
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## Use RuntimeClass
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RuntimeClass is used for selecting the container runtime configuration to use to run a pod’s containers, see [runtime-class](https://kubernetes.io/docs/concepts/containers/runtime-class/). Currently, only `kata-containers` and `runc` this two `oci runtime` are supported.
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1. Configure `isulad` in `/etc/isulad/daemon.json`:
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```json
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"runtimes": {
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"runc":{
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"path": "/usr/bin/runc",
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"runtime-args": []
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},
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"kata-runtime": {
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"path": "/usr/bin/kata-runtime",
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"runtime-args": [
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"--kata-config",
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"/usr/share/defaults/kata-containers/configuration.toml"
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]
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}
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}
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```
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2. Extra configuration
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`iSulad` supports the `overlay2` and `devicemapper` as storage drivers. The default value is `overlay2`.
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In some scenarios, using block device type as storage drivers is a better choice, such as run a `kata-containers`. The procedure for configuring the `devicemapper` is as follows:
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Create ThinPool:
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```bash
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$ sudo pvcreate /dev/sdb1 # /dev/sdb1 for example
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$ sudo vgcreate isulad /dev/sdb
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$ sudo echo y | lvcreate --wipesignatures y -n thinpool isulad -L 200G
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$ sudo echo y | lvcreate --wipesignatures y -n thinpoolmeta isulad -L 20G
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$ sudo lvconvert -y --zero n -c 512K --thinpool isulad/thinpool --poolmetadata isulad/thinpoolmeta
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$ sudo lvchange --metadataprofile isulad-thinpool isulad/thinpool
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```
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Add configuration for `devicemapper` in `/etc/isulad/daemon.json`:
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```json
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"storage-driver": "devicemapper"
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"storage-opts": [
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"dm.thinpooldev=/dev/mapper/isulad-thinpool",
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"dm.fs=ext4",
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"dm.min_free_space=10%"
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]
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```
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3. Restart `isulad`:
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```bash
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$ sudo systemctl restart isulad
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```
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4. Define `RuntimeClass CRD` for example:
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```yaml
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apiVersion: node.k8s.io/v1beta1
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kind: RuntimeClass
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metadata:
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name: kata-runtime
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handler: kata-runtime
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```
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5. Define pod spec `kata-pod.yaml` for example:
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```yaml
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apiVersion: v1
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kind: Pod
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metadata:
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name: kata-pod-example
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spec:
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runtimeClassName: kata-runtime
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containers:
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- name: kata-pod
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image: busybox:latest
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command: ["/bin/sh"]
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args: ["-c", "sleep 1000"]
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hostNetwork: true
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```
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6. Run pod:
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```bash
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$ kubectl create -f kata-pod.yaml
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$ kubectl get pod
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NAME READY STATUS RESTARTS AGE
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kata-pod-example 1/1 Running 4 2s
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```
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