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。
我注意到主节点是使用特定标签定义的:kubernetes.io/role=master
并带有污点:scheduler.alpha.kubernetes.io/taints:[{"key":"dedicated","value":"master","effect":"NoSchedule"}]
但是,使用DaemonSet
在其上部署了一个pod并没有停止所以我尝试添加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
并向仅为minion的节点添加标签,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,它将是最好的:))
修改
我改为那个(给出答案),我认为这是正确的,但它没有帮助,我仍然部署了一个吊舱:
- 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
答案 0 :(得分:0)
只需将注释移到 pod template:
部分(metadata:
下)。
或者taint主节点(您可以删除注释):
kubectl taint nodes nameofmaster dedicated=master:NoSchedule
我建议你阅读taints and tolerations。