K8s设置Master可调度与不可调度
查看master节点,默认是不可调度
[root@k8s-master ~]# kubectl describe nodes k8s-master
Name: k8s-master
Roles: master
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/os=linux
kubernetes.io/arch=amd64
kubernetes.io/hostname=k8s-master
kubernetes.io/os=linux
node-role.kubernetes.io/master=
type=k8s-master
Annotations: flannel.alpha.coreos.com/backend-data: {"VtepMAC":"7e:6b:ef:cd:fa:32"}
flannel.alpha.coreos.com/backend-type: vxlan
flannel.alpha.coreos.com/kube-subnet-manager: true
flannel.alpha.coreos.com/public-ip: 42.51.227.113
kubeadm.alpha.kubernetes.io/cri-socket: /var/run/dockershim.sock
node.alpha.kubernetes.io/ttl: 0
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Tue, 28 Apr 2020 22:21:21 +0800
Taints: node-role.kubernetes.io/master:NoSchedule
Unschedulable: false
Lease:
HolderIdentity: k8s-master
AcquireTime: <unset>
RenewTime: Sat, 17 Apr 2021 19:47:33 +0800
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
NetworkUnavailable False Thu, 07 Jan 2021 16:07:00 +0800 Thu, 07 Jan 2021 16:07:00 +0800 FlannelIsUp Flannel is running on this node
MemoryPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasNoDiskPressure kubelet has no disk pressure
PIDPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasSufficientPID kubelet has sufficient PID available
Ready True Sat, 17 Apr 2021 19:47:15 +0800 Thu, 07 Jan 2021 11:27:47 +0800 KubeletReady kubelet is posting ready status
Addresses:
InternalIP: 42.51.227.113
Hostname: k8s-master
Capacity:
cpu: 8
ephemeral-storage: 52417516Ki
hugepages-2Mi: 0
memory: 16431444Ki
pods: 110
Allocatable:
cpu: 8
ephemeral-storage: 48307982666
hugepages-2Mi: 0
memory: 16329044Ki
pods: 110
System Info:
Machine ID: 5003025f93c1a84914ea5ae66519c100
System UUID: AED4BF27-3256-4DF2-BFC6-8F4048D371F7
Boot ID: 0de03cf4-6108-412a-9f22-4b6e95e872a4
Kernel Version: 4.4.220-1.el7.elrepo.x86_64
OS Image: CentOS Linux 7 (Core)
Operating System: linux
Architecture: amd64
Container Runtime Version: docker://19.3.14
Kubelet Version: v1.18.14
Kube-Proxy Version: v1.18.14
PodCIDR: 10.244.0.0/24
PodCIDRs: 10.244.0.0/24
Non-terminated Pods: (27 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits AGE
--------- ---- ------------ ---------- --------------- ------------- ---
kube-system coredns-7ff77c879f-4v7f6 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-5d8wr 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-gc7sf 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-mkz45 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-ws26k 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system etcd-k8s-master 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kube-system kube-apiserver-k8s-master 250m (3%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-controller-manager-k8s-master 200m (2%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-flannel-ds-amd64-v8k4g 100m (1%) 100m (1%) 50Mi (0%) 50Mi (0%) 116d
kube-system kube-proxy-hh62c 0 (0%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-scheduler-k8s-master 100m (1%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kuboard-pv-browser-vzbp8 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-bzcsh 0 (0%) 0 (0%) 0 (0%) 0 (0%) 58d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-cd78c 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-hgm9f 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-lrnfl 0 (0%) 0 (0%) 0 (0%) 0 (0%) 58d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-xz6rd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-8c4c6 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-bn2gz 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-j5fxx 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-jcpfd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-kzs4v 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-lh77l 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-mbrd5 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-p4zq4 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-tcscd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-zbrq7 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.)
Resource Requests Limits
-------- -------- ------
cpu 1150m (14%) 100m (1%)
memory 400Mi (2%) 900Mi (5%)
ephemeral-storage 0 (0%) 0 (0%)
hugepages-2Mi 0 (0%) 0 (0%)
Events: <none>去掉污点
[root@k8s-master ~]# kubectl taint node k8s-master node-role.kubernetes.io/master-
node/k8s-master untainted查看节点信息---发现污点已被去掉，可以被调度
[root@k8s-master ~]# kubectl describe nodes k8s-master
Name: k8s-master
Roles: master
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/os=linux
kubernetes.io/arch=amd64
kubernetes.io/hostname=k8s-master
kubernetes.io/os=linux
node-role.kubernetes.io/master=
type=k8s-master
Annotations: flannel.alpha.coreos.com/backend-data: {"VtepMAC":"7e:6b:ef:cd:fa:32"}
flannel.alpha.coreos.com/backend-type: vxlan
flannel.alpha.coreos.com/kube-subnet-manager: true
flannel.alpha.coreos.com/public-ip: 42.51.227.113
kubeadm.alpha.kubernetes.io/cri-socket: /var/run/dockershim.sock
node.alpha.kubernetes.io/ttl: 0
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Tue, 28 Apr 2020 22:21:21 +0800
Taints: <none>
Unschedulable: false
Lease:
HolderIdentity: k8s-master
AcquireTime: <unset>
RenewTime: Sat, 17 Apr 2021 19:48:03 +0800
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
NetworkUnavailable False Thu, 07 Jan 2021 16:07:00 +0800 Thu, 07 Jan 2021 16:07:00 +0800 FlannelIsUp Flannel is running on this node
MemoryPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasNoDiskPressure kubelet has no disk pressure
PIDPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasSufficientPID kubelet has sufficient PID available
Ready True Sat, 17 Apr 2021 19:47:15 +0800 Thu, 07 Jan 2021 11:27:47 +0800 KubeletReady kubelet is posting ready status
Addresses:
InternalIP: 42.51.227.113
Hostname: k8s-master
Capacity:
cpu: 8
ephemeral-storage: 52417516Ki
hugepages-2Mi: 0
memory: 16431444Ki
pods: 110
Allocatable:
cpu: 8
ephemeral-storage: 48307982666
hugepages-2Mi: 0
memory: 16329044Ki
pods: 110
System Info:
Machine ID: 5003025f93c1a84914ea5ae66519c100
System UUID: AED4BF27-3256-4DF2-BFC6-8F4048D371F7
Boot ID: 0de03cf4-6108-412a-9f22-4b6e95e872a4
Kernel Version: 4.4.220-1.el7.elrepo.x86_64
OS Image: CentOS Linux 7 (Core)
Operating System: linux
Architecture: amd64
Container Runtime Version: docker://19.3.14
Kubelet Version: v1.18.14
Kube-Proxy Version: v1.18.14
PodCIDR: 10.244.0.0/24
PodCIDRs: 10.244.0.0/24
Non-terminated Pods: (27 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits AGE
--------- ---- ------------ ---------- --------------- ------------- ---
kube-system coredns-7ff77c879f-4v7f6 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-5d8wr 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-gc7sf 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-mkz45 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-ws26k 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system etcd-k8s-master 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kube-system kube-apiserver-k8s-master 250m (3%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-controller-manager-k8s-master 200m (2%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-flannel-ds-amd64-v8k4g 100m (1%) 100m (1%) 50Mi (0%) 50Mi (0%) 116d
kube-system kube-proxy-hh62c 0 (0%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-scheduler-k8s-master 100m (1%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kuboard-pv-browser-vzbp8 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-bzcsh 0 (0%) 0 (0%) 0 (0%) 0 (0%) 58d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-cd78c 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-hgm9f 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-lrnfl 0 (0%) 0 (0%) 0 (0%) 0 (0%) 58d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-xz6rd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-8c4c6 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-bn2gz 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-j5fxx 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-jcpfd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-kzs4v 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-lh77l 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-mbrd5 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-p4zq4 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-tcscd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-zbrq7 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.)
Resource Requests Limits
-------- -------- ------
cpu 1150m (14%) 100m (1%)
memory 400Mi (2%) 900Mi (5%)
ephemeral-storage 0 (0%) 0 (0%)
hugepages-2Mi 0 (0%) 0 (0%)
Events: <none>打上污点
[root@k8s-master ~]# kubectl taint node k8s-master node-role.kubernetes.io/master="":NoSchedule
node/k8s-master tainted查看节点信息---发现已经不能被调度了
[root@k8s-master ~]# kubectl describe nodes k8s-master
Name: k8s-master
Roles: master
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/os=linux
kubernetes.io/arch=amd64
kubernetes.io/hostname=k8s-master
kubernetes.io/os=linux
node-role.kubernetes.io/master=
type=k8s-master
Annotations: flannel.alpha.coreos.com/backend-data: {"VtepMAC":"7e:6b:ef:cd:fa:32"}
flannel.alpha.coreos.com/backend-type: vxlan
flannel.alpha.coreos.com/kube-subnet-manager: true
flannel.alpha.coreos.com/public-ip: 42.51.227.113
kubeadm.alpha.kubernetes.io/cri-socket: /var/run/dockershim.sock
node.alpha.kubernetes.io/ttl: 0
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Tue, 28 Apr 2020 22:21:21 +0800
Taints: node-role.kubernetes.io/master:NoSchedule
Unschedulable: false
Lease:
HolderIdentity: k8s-master
AcquireTime: <unset>
RenewTime: Sat, 17 Apr 2021 19:51:03 +0800
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
NetworkUnavailable False Thu, 07 Jan 2021 16:07:00 +0800 Thu, 07 Jan 2021 16:07:00 +0800 FlannelIsUp Flannel is running on this node
MemoryPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasNoDiskPressure kubelet has no disk pressure
PIDPressure False Sat, 17 Apr 2021 19:47:15 +0800 Fri, 08 May 2020 10:03:48 +0800 KubeletHasSufficientPID kubelet has sufficient PID available
Ready True Sat, 17 Apr 2021 19:47:15 +0800 Thu, 07 Jan 2021 11:27:47 +0800 KubeletReady kubelet is posting ready status
Addresses:
InternalIP: 42.51.227.113
Hostname: k8s-master
Capacity:
cpu: 8
ephemeral-storage: 52417516Ki
hugepages-2Mi: 0
memory: 16431444Ki
pods: 110
Allocatable:
cpu: 8
ephemeral-storage: 48307982666
hugepages-2Mi: 0
memory: 16329044Ki
pods: 110
System Info:
Machine ID: 5003025f93c1a84914ea5ae66519c100
System UUID: AED4BF27-3256-4DF2-BFC6-8F4048D371F7
Boot ID: 0de03cf4-6108-412a-9f22-4b6e95e872a4
Kernel Version: 4.4.220-1.el7.elrepo.x86_64
OS Image: CentOS Linux 7 (Core)
Operating System: linux
Architecture: amd64
Container Runtime Version: docker://19.3.14
Kubelet Version: v1.18.14
Kube-Proxy Version: v1.18.14
PodCIDR: 10.244.0.0/24
PodCIDRs: 10.244.0.0/24
Non-terminated Pods: (27 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits AGE
--------- ---- ------------ ---------- --------------- ------------- ---
kube-system coredns-7ff77c879f-4v7f6 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-5d8wr 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-gc7sf 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-mkz45 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system coredns-7ff77c879f-ws26k 100m (1%) 0 (0%) 70Mi (0%) 170Mi (1%) 58d
kube-system etcd-k8s-master 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kube-system kube-apiserver-k8s-master 250m (3%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-controller-manager-k8s-master 200m (2%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-flannel-ds-amd64-v8k4g 100m (1%) 100m (1%) 50Mi (0%) 50Mi (0%) 116d
kube-system kube-proxy-hh62c 0 (0%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kube-scheduler-k8s-master 100m (1%) 0 (0%) 0 (0%) 0 (0%) 100d
kube-system kuboard-pv-browser-vzbp8 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-bzcsh 0 (0%) 0 (0%) 0 (0%) 0 (0%) 58d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-cd78c 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-hgm9f 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-lrnfl 0 (0%) 0 (0%) 0 (0%) 0 (0%) 58d
kubernetes-dashboard dashboard-metrics-scraper-66b49655d4-xz6rd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-8c4c6 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-bn2gz 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-j5fxx 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-jcpfd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-kzs4v 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-lh77l 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-mbrd5 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-p4zq4 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-tcscd 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
kubernetes-dashboard kubernetes-dashboard-d866db8ff-zbrq7 0 (0%) 0 (0%) 0 (0%) 0 (0%) 116d
Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.)
Resource Requests Limits
-------- -------- ------
cpu 1150m (14%) 100m (1%)
memory 400Mi (2%) 900Mi (5%)
ephemeral-storage 0 (0%) 0 (0%)
hugepages-2Mi 0 (0%) 0 (0%)
Events: <none>本文参与 腾讯云自媒体分享计划，分享自作者个人站点/博客。
原始发表：2021-04-17，如有侵权请联系 cloudcommunity@tencent.com 删除
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