Kubernetes 当集群中的一个节点的可请求内存不足时，为什么我的部署会进入挂起状态？
我是kubernetes的新手，我在玩K3S。我通过在部署中打开副本来测试服务器的最大功率。在150时，我最薄弱的服务器达到了内存请求上限，无法为部署中的吊舱分配更多内存，从而使它们处于“挂起”状态。我看到节点的状态显示为“就绪，计划已禁用”，这一切都是有意义的 我不明白的是，为什么另一台服务器不接收这些挂起的部署并在那里部署它们Kubernetes 当集群中的一个节点的可请求内存不足时，为什么我的部署会进入挂起状态？,kubernetes,kubectl,k3s,Kubernetes,Kubectl,K3s,我是kubernetes的新手，我在玩K3S。我通过在部署中打开副本来测试服务器的最大功率。在150时，我最薄弱的服务器达到了内存请求上限，无法为部署中的吊舱分配更多内存，从而使它们处于“挂起”状态。我看到节点的状态显示为“就绪，计划已禁用”，这一切都是有意义的 我不明白的是，为什么另一台服务器不接收这些挂起的部署并在那里部署它们 # kubectl get nodes -A NAME STATUS ROLES AGE
# kubectl get nodes -A
NAME STATUS ROLES AGE VERSION
titan.zircon.local Ready master 3d23h v1.16.3-k3s.2
nexus.zircon.local Ready,SchedulingDisabled worker 2d21h v1.16.3-k3s.2
# kubectl top nodes
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
nexus.zircon.local 170m 2% 3008Mi 25%
titan.zircon.local 316m 0% 2313Mi 1%
default fedora-7c586469b4-ldq8l 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-sbzph 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-74mmh 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-ldq8l 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-k4669 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-6gg2c 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-sbzph 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-74mmh 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-k4669 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-6gg2c 0/1 Pending 0 0s <none> <none> <none> <none>
default fedora-7c586469b4-94tx6 0/1 Pending 0 7m43s <none> <none> <none> <none>
default fedora-7c586469b4-k8bdl 0/1 Pending 0 7m43s <none> <none> <none> <none>
default fedora-7c586469b4-8d64k 0/1 Pending 0 7m43s <none> <none> <none> <none>
default fedora-7c586469b4-ldq8l 0/1 Pending 0 2m59s <none> <none> <none> <none>
default fedora-7c586469b4-sbzph 0/1 Pending 0 2m59s <none> <none> <none> <none>
default fedora-7c586469b4-74mmh 0/1 Pending 0 2m59s <none> <none> <none> <none>
default fedora-7c586469b4-k4669 0/1 Pending 0 2m59s <none> <none> <none> <none>
default fedora-7c586469b4-6gg2c 0/1 Pending 0 2m59s <none> <none> <none> <none>
我相信我找到了我问题的答案。显然，对于我的主节点（剩余空间的节点）已经命中的110个吊舱，节点有一个上限，使其满了
# kubectl describe node titan.zircon.local
Name: titan.zircon.local
Roles: master
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/instance-type=k3s
beta.kubernetes.io/os=linux
k3s.io/hostname=titan.zircon.local
k3s.io/internal-ip=192.168.1.96
kubernetes.io/arch=amd64
kubernetes.io/hostname=titan.zircon.local
kubernetes.io/os=linux
node-role.kubernetes.io/master=true
Annotations: flannel.alpha.coreos.com/backend-data: {"VtepMAC":"d2:3d:24:54:f1:cb"}
flannel.alpha.coreos.com/backend-type: vxlan
flannel.alpha.coreos.com/kube-subnet-manager: true
flannel.alpha.coreos.com/public-ip: 192.168.1.96
node.alpha.kubernetes.io/ttl: 0
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Mon, 23 Dec 2019 15:54:12 -0500
Taints: <none>
Unschedulable: false
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
NetworkUnavailable False Fri, 27 Dec 2019 15:31:40 -0500 Fri, 27 Dec 2019 15:31:40 -0500 FlannelIsUp Flannel is running on this node
MemoryPressure False Fri, 27 Dec 2019 15:55:49 -0500 Mon, 23 Dec 2019 15:54:12 -0500 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Fri, 27 Dec 2019 15:55:49 -0500 Mon, 23 Dec 2019 15:54:12 -0500 KubeletHasNoDiskPressure kubelet has no disk pressure
PIDPressure False Fri, 27 Dec 2019 15:55:49 -0500 Mon, 23 Dec 2019 15:54:12 -0500 KubeletHasSufficientPID kubelet has sufficient PID available
Ready True Fri, 27 Dec 2019 15:55:49 -0500 Fri, 27 Dec 2019 15:31:39 -0500 KubeletReady kubelet is posting ready status
Addresses:
InternalIP: 192.168.1.96
Hostname: titan.zircon.local
Capacity:
cpu: 32
ephemeral-storage: 7623778Mi
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 131837268Ki
pods: 110 <============HERE
Allocatable:
cpu: 32
ephemeral-storage: 7594405102166
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 131837268Ki
pods: 110 <============HERE
System Info:
Operating System: linux
Architecture: amd64
Container Runtime Version: containerd://1.3.0-k3s.5
Kubelet Version: v1.16.3-k3s.2
Kube-Proxy Version: v1.16.3-k3s.2
PodCIDR: 10.42.0.0/24
PodCIDRs: 10.42.0.0/24
ProviderID: k3s://titan.zircon.local
Non-terminated Pods: (110 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits AGE
--------- ---- ------------ ---------- --------------- ------------- ---
kube-system metrics-server-6d684c7b5-5kpbr 0 (0%) 0 (0%) 0 (0%) 0 (0%) 4d
kube-system local-path-provisioner-58fb86bdfd-7b2ss 0 (0%) 0 (0%) 0 (0%) 0 (0%) 4d
#kubectl描述节点titan.zron.local
名称：titan.Zront.local
角色：硕士
标签：beta.kubernetes.io/arch=amd64
beta.kubernetes.io/实例类型=k3s
beta.kubernetes.io/os=linux
k3s.io/hostname=titan.zron.local
k3s.io/内部ip=192.168.1.96
kubernetes.io/arch=amd64
kubernetes.io/hostname=titan.zron.local
kubernetes.io/os=linux
节点角色.kubernetes.io/master=true
注释：flannel.alpha.coreos.com/backend-data:{“VtepMAC”：“d2:3d:24:54:f1:cb”}
flannel.alpha.coreos.com/backend-type:vxlan
flannel.alpha.coreos.com/kube-subnet-manager:true
flannel.alpha.coreos.com/public-ip:192.168.1.96
node.alpha.kubernetes.io/ttl:0
volumes.kubernetes.io/controller-managed-attach-detach:true
CreationTimestamp:2019年12月23日星期一15:54:12-0500
污点：
计划外：错误
条件：
键入状态LastHeartbeatTime LastTransitionTime原因消息
---- ------ ----------------- ------------------ ------ -------
NetworkUnavailable False Fri，2019年12月27日15:31:40-0500 Fri，2019年12月27日15:31:40-0500 FlannelIsUp Flannel正在该节点上运行
MemoryPressure False Fri，2019年12月27日15:55:49-0500 Mon，2019年12月23日15:54:12-0500 KubelethSufficientMemory kubelet有足够的可用内存
DiskPressure False Fri，2019年12月27日15:55:49-0500 Mon，2019年12月23日15:54:12-0500 KubelethasNodeDiskPressure kubelet无磁盘压力
PIDPression False Fri，2019年12月27日15:55:49-0500 Mon，2019年12月23日15:54:12-0500 Kubelethassufficient PID kubelet有足够的可用PID
Ready True Fri，2019年12月27日15:55:49-0500 Fri，2019年12月27日15:31:39-0500 KubeletReady kubelet发布就绪状态
地址：
内部IP:192.168.1.96
主机名：titan.zron.local
容量：
中央处理器：32
短暂存储：7623778Mi
hugepages-1Gi:0
hugepages-2Mi:0
内存：131837268Ki
豆荚：110
# kubectl describe node titan.zircon.local
Name: titan.zircon.local
Roles: master
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/instance-type=k3s
beta.kubernetes.io/os=linux
k3s.io/hostname=titan.zircon.local
k3s.io/internal-ip=192.168.1.96
kubernetes.io/arch=amd64
kubernetes.io/hostname=titan.zircon.local
kubernetes.io/os=linux
node-role.kubernetes.io/master=true
Annotations: flannel.alpha.coreos.com/backend-data: {"VtepMAC":"d2:3d:24:54:f1:cb"}
flannel.alpha.coreos.com/backend-type: vxlan
flannel.alpha.coreos.com/kube-subnet-manager: true
flannel.alpha.coreos.com/public-ip: 192.168.1.96
node.alpha.kubernetes.io/ttl: 0
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Mon, 23 Dec 2019 15:54:12 -0500
Taints: <none>
Unschedulable: false
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
NetworkUnavailable False Fri, 27 Dec 2019 15:31:40 -0500 Fri, 27 Dec 2019 15:31:40 -0500 FlannelIsUp Flannel is running on this node
MemoryPressure False Fri, 27 Dec 2019 15:55:49 -0500 Mon, 23 Dec 2019 15:54:12 -0500 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Fri, 27 Dec 2019 15:55:49 -0500 Mon, 23 Dec 2019 15:54:12 -0500 KubeletHasNoDiskPressure kubelet has no disk pressure
PIDPressure False Fri, 27 Dec 2019 15:55:49 -0500 Mon, 23 Dec 2019 15:54:12 -0500 KubeletHasSufficientPID kubelet has sufficient PID available
Ready True Fri, 27 Dec 2019 15:55:49 -0500 Fri, 27 Dec 2019 15:31:39 -0500 KubeletReady kubelet is posting ready status
Addresses:
InternalIP: 192.168.1.96
Hostname: titan.zircon.local
Capacity:
cpu: 32
ephemeral-storage: 7623778Mi
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 131837268Ki
pods: 110 <============HERE
Allocatable:
cpu: 32
ephemeral-storage: 7594405102166
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 131837268Ki
pods: 110 <============HERE
System Info:
Operating System: linux
Architecture: amd64
Container Runtime Version: containerd://1.3.0-k3s.5
Kubelet Version: v1.16.3-k3s.2
Kube-Proxy Version: v1.16.3-k3s.2
PodCIDR: 10.42.0.0/24
PodCIDRs: 10.42.0.0/24
ProviderID: k3s://titan.zircon.local
Non-terminated Pods: (110 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits AGE
--------- ---- ------------ ---------- --------------- ------------- ---
kube-system metrics-server-6d684c7b5-5kpbr 0 (0%) 0 (0%) 0 (0%) 0 (0%) 4d
kube-system local-path-provisioner-58fb86bdfd-7b2ss 0 (0%) 0 (0%) 0 (0%) 0 (0%) 4d