3.10. 运行自定义调度程序

流程

1. 创建包含包含调度程序配置文件的配置映射的文件：

   Example scheduler-config-map.yaml

   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: scheduler-config
     namespace: kube-system 1
   data:
     scheduler-config.yaml: | 2
       apiVersion: kubescheduler.config.k8s.io/v1beta2
       kind: KubeSchedulerConfiguration
       profiles:
         - schedulerName: custom-scheduler 3
       leaderElection:
         leaderElect: false

   1

   此流程使用 kube-system 命名空间，但您可以使用自己选择的命名空间。

   2

   当此流程稍后定义 Deployment 资源时，您可以使用 --config 参数将此文件传递给调度程序命令。

   3

   为自定义调度程序定义调度程序配置集。在 Pod 配置中定义 schedulerName 时使用此调度程序名称。

2. 创建配置映射：

   $ oc create -f scheduler-config-map.yaml

3. 创建一个包含自定义调度程序部署资源的文件：

   custom-scheduler.yaml 文件示例

   apiVersion: v1
   kind: ServiceAccount
   metadata:
     name: custom-scheduler
     namespace: kube-system 1
   ---
   apiVersion: rbac.authorization.k8s.io/v1
   kind: ClusterRoleBinding
   metadata:
     name: custom-scheduler-as-kube-scheduler
   subjects:
   - kind: ServiceAccount
     name: custom-scheduler
     namespace: kube-system 2
   roleRef:
     kind: ClusterRole
     name: system:kube-scheduler
     apiGroup: rbac.authorization.k8s.io
   ---
   apiVersion: rbac.authorization.k8s.io/v1
   kind: ClusterRoleBinding
   metadata:
     name: custom-scheduler-as-volume-scheduler
   subjects:
   - kind: ServiceAccount
     name: custom-scheduler
     namespace: kube-system 3
   roleRef:
     kind: ClusterRole
     name: system:volume-scheduler
     apiGroup: rbac.authorization.k8s.io
   ---
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     labels:
       component: scheduler
       tier: control-plane
     name: custom-scheduler
     namespace: kube-system 4
   spec:
     selector:
       matchLabels:
         component: scheduler
         tier: control-plane
     replicas: 1
     template:
       metadata:
         labels:
           component: scheduler
           tier: control-plane
           version: second
       spec:
         serviceAccountName: custom-scheduler
         containers:
         - command:
           - /usr/local/bin/kube-scheduler
           - --config=/etc/config/scheduler-config.yaml 5
           image: "<namespace>/<image_name>:<tag>" 6
           livenessProbe:
             httpGet:
               path: /healthz
               port: 10259
               scheme: HTTPS
             initialDelaySeconds: 15
           name: kube-second-scheduler
           readinessProbe:
             httpGet:
               path: /healthz
               port: 10259
               scheme: HTTPS
           resources:
             requests:
               cpu: '0.1'
           securityContext:
             privileged: false
           volumeMounts:
           - name: config-volume
             mountPath: /etc/config
         hostNetwork: false
         hostPID: false
         volumes:
           - name: config-volume
             configMap:
               name: scheduler-config

   1 2 3 4

   此流程使用 kube-system 命名空间，但您可以使用自己选择的命名空间。

   5

   自定义调度程序的命令可能需要不同的参数。

   6

   指定您为自定义调度程序创建的容器镜像。

4. 在集群中创建部署资源：

   $ oc create -f custom-scheduler.yaml