我尝试按节点部署一个pod . 它适用于种类daemonSet以及使用kubeup创建集群时 . 但是我们使用kops迁移了集群创建,而使用kops,主节点是集群的一部分 .
我注意到主节点定义了一个特定的标签: kubernetes.io/role=master
和污点:scheduler.alpha.kubernetes.io/taints: [{"key":"dedicated","value":"master","effect":"NoSchedule"}]
但它并没有停止使用DaemonSet在其上部署一个pod
所以我试着添加 scheduler.alpha.kubernetes.io/affinity
:
- apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: elasticsearch-data
namespace: ess
annotations:
scheduler.alpha.kubernetes.io/affinity: >
{
"nodeAffinity": {
"requiredDuringSchedulingRequiredDuringExecution": {
"nodeSelectorTerms": [
{
"matchExpressions": [
{
"key": "kubernetes.io/role",
"operator": "NotIn",
"values": ["master"]
}
]
}
]
}
}
}
spec:
selector:
matchLabels:
component: elasticsearch
type: data
provider: fabric8
template:
metadata:
labels:
component: elasticsearch
type: data
provider: fabric8
spec:
serviceAccount: elasticsearch
serviceAccountName: elasticsearch
containers:
- env:
- name: "SERVICE_DNS"
value: "elasticsearch-cluster"
- name: "NODE_MASTER"
value: "false"
image: "essearch/ess-elasticsearch:1.7.6"
name: elasticsearch
imagePullPolicy: Always
ports:
- containerPort: 9300
name: transport
volumeMounts:
- mountPath: "/usr/share/elasticsearch/data"
name: task-pv-storage
volumes:
- name: task-pv-storage
persistentVolumeClaim:
claimName: task-pv-claim
nodeSelector:
minion: true
但它不起作用 . 有人知道为什么吗?我现在的解决方法是使用 nodeSelector
并将标签添加到仅为minion的节点,但我会避免在群集创建期间添加标签,因为这是一个额外的步骤,如果我可以避免它,它将是最好 :)
EDIT:
我改变了(给出答案),我认为这是正确的,但它没有帮助,我仍然部署了一个pod:
- apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: elasticsearch-data
namespace: ess
spec:
selector:
matchLabels:
component: elasticsearch
type: data
provider: fabric8
template:
metadata:
labels:
component: elasticsearch
type: data
provider: fabric8
annotations:
scheduler.alpha.kubernetes.io/affinity: >
{
"nodeAffinity": {
"requiredDuringSchedulingRequiredDuringExecution": {
"nodeSelectorTerms": [
{
"matchExpressions": [
{
"key": "kubernetes.io/role",
"operator": "NotIn",
"values": ["master"]
}
]
}
]
}
}
}
spec:
serviceAccount: elasticsearch
serviceAccountName: elasticsearch
containers:
- env:
- name: "SERVICE_DNS"
value: "elasticsearch-cluster"
- name: "NODE_MASTER"
value: "false"
image: "essearch/ess-elasticsearch:1.7.6"
name: elasticsearch
imagePullPolicy: Always
ports:
- containerPort: 9300
name: transport
volumeMounts:
- mountPath: "/usr/share/elasticsearch/data"
name: task-pv-storage
volumes:
- name: task-pv-storage
persistentVolumeClaim:
claimName: task-pv-claim
1 回答
只需将注释移动到 pod
template:
部分(在metadata:
下) .或者taint主节点(您可以删除注释):
我建议你阅读taints and tolerations .