i have a problem issues with Kubernetes worker, i am have 2 machines first as master and second as worker (node). ubuntu server Ubuntu 18.04.3 LTS when i run the following command:
kubectl describe node kubernetes-worker
the following output:
Name: kubernetes-worker
Roles:
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/os=linux
kubernetes.io/arch=amd64
kubernetes.io/hostname=kubernetes-worker
kubernetes.io/os=linux
role=worker
Annotations: flannel.alpha.coreos.com/backend-data: {"VtepMAC":"82:22:c1:fa:c8:61"}
flannel.alpha.coreos.com/backend-type: vxlan
flannel.alpha.coreos.com/kube-subnet-manager: true
flannel.alpha.coreos.com/public-ip: 192.168.1.36
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: Mon, 02 Dec 2019 09:31:37 +0000
Taints: node.kubernetes.io/unreachable:NoSchedule
Unschedulable: false
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
MemoryPressure Unknown Sat, 28 Dec 2019 15:31:21 +0000 Mon, 30 Dec 2019 06:31:26 +0000 NodeStatusUnknown Kubelet stopped posting node status.
DiskPressure Unknown Sat, 28 Dec 2019 15:31:21 +0000 Mon, 30 Dec 2019 06:31:26 +0000 NodeStatusUnknown Kubelet stopped posting node status.
PIDPressure Unknown Sat, 28 Dec 2019 15:31:21 +0000 Mon, 30 Dec 2019 06:31:26 +0000 NodeStatusUnknown Kubelet stopped posting node status.
Ready Unknown Sat, 28 Dec 2019 15:31:21 +0000 Mon, 30 Dec 2019 06:31:26 +0000 NodeStatusUnknown Kubelet stopped posting node status.
Addresses:
InternalIP: 192.168.1.36
Hostname: kubernetes-worker
Capacity:
cpu: 2
ephemeral-storage: 130551876Ki
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 3918032Ki
pods: 110
Allocatable:
cpu: 2
ephemeral-storage: 120316608723
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 3815632Ki
pods: 110
System Info:
Machine ID: c87a16d69ec94e03a8a281b2d54c722c
System UUID: F493BA8E-F779-234F-AC40-C4899AC930B9
Boot ID: f9b6eb1e-0a6b-4765-b8d6-1e5527a7f970
Kernel Version: 4.15.0-70-generic
OS Image: Ubuntu 18.04.3 LTS
Operating System: linux
Architecture: amd64
Container Runtime Version: docker://18.9.7
Kubelet Version: v1.16.3
Kube-Proxy Version: v1.16.3
PodCIDR: 10.244.1.0/24
PodCIDRs: 10.244.1.0/24
Non-terminated Pods: (2 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits AGE
--------- ---- ------------ ---------- --------------- ------------- ---
kube-system kube-flannel-ds-amd64-ssk8h 100m (5%) 100m (5%) 50Mi (1%) 50Mi (1%) 51d
kube-system kube-proxy-965g2 0 (0%) 0 (0%) 0 (0%) 0 (0%) 51d
Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.)
Resource Requests Limits
-------- -------- ------
cpu 100m (5%) 100m (5%)
memory 50Mi (1%) 50Mi (1%)
ephemeral-storage 0 (0%) 0 (0%)
`
what the problem and how i resolve this, this happened from nowhere i don't touch any settings or something. thank for help.
Update
<pre> 947 summary_sys_containers.go:47] Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats Jan 23 07:26:27 kubernetes-master kubelet[947]: E0123 07:26:27.344712 947 summary_sys_containers.go:47] Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats Jan 23 07:26:37 kubernetes-master kubelet[947]: E0123 07:26:37.446034 947 summary_sys_containers.go:47] Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats </pre>
