Cluster information:
Kubernetes version: 1.22.2
Cloud being used: bare-metal
Installation method: yum repo
Host OS: Oracle Linux Server 7.9
CNI and version: weave 0.3.0
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I am still new to Kubernetes and I was trying to set up a cluster on bare metal servers according to the official docu.
Right now I am running a one worker and one master node configuration, but I am struggling to run all the pods once the cluster initializes. The main problem is the coredns pods, that are stuck in the ContainerCreating state.
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-78fcd69978-4vtsp 0/1 ContainerCreating 0 5s
kube-system coredns-78fcd69978-wtn2c 0/1 ContainerCreating 0 12h
kube-system etcd-dcpoth24213118 1/1 Running 4 12h
kube-system kube-apiserver-dcpoth24213118 1/1 Running 0 12h
kube-system kube-controller-manager-dcpoth24213118 1/1 Running 0 12h
kube-system kube-proxy-8282p 1/1 Running 0 12h
kube-system kube-scheduler-dcpoth24213118 1/1 Running 0 12h
kube-system weave-net-6zz2j 2/2 Running 0 12h
After checking the logs I’ve noticed this error. The problem is I don’t really know what the error is refering to.
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 19s default-scheduler Successfully assigned kube-system/coredns-78fcd69978-4vtsp to dcpoth24213118
Warning FailedCreatePodSandBox 13s kubelet Failed to create pod sandbox: rpc error: code = Unknown desc = [failed to set up sandbox container "2521c9dd723f3fc50b3510791a8c35cbc9ec19768468eb3da3367274a4dfcbba" network for pod "coredns-78fcd69978-4vtsp": networkPlugin cni failed to set up pod "coredns-78fcd69978-4vtsp_kube-system" network: error getting ClusterInformation: Get "https://[10.43.0.1]:443/apis/crd.projectcalico.org/v1/clusterinformations/default": dial tcp 10.43.0.1:443: connect: no route to host, failed to clean up sandbox container "2521c9dd723f3fc50b3510791a8c35cbc9ec19768468eb3da3367274a4dfcbba" network for pod "coredns-78fcd69978-4vtsp": networkPlugin cni failed to teardown pod "coredns-78fcd69978-4vtsp_kube-system" network: error getting ClusterInformation: Get "https://[10.43.0.1]:443/apis/crd.projectcalico.org/v1/clusterinformations/default": dial tcp 10.43.0.1:443: connect: no route to host]
Normal SandboxChanged 10s (x2 over 12s) kubelet Pod sandbox changed, it will be killed and re-created.
I’ve running the kuberenetes cluster behind a corporate proxy. I’ve set the environmental variables as follows.
export https_proxy=http://proxyIP:PORT
export http_proxy=http://proxyIP:PORT
export HTTP_PROXY="${http_proxy}"
export HTTPS_PROXY="${https_proxy}"
export NO_PROXY=localhost,127.0.0.1,master_node_IP,worker_node_IP,10.0.0.0/8,10.96.0.0/16
[root@dcpoth24213118 ~]# kubectl get svc -A
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 12h
kube-system kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP,9153/TCP 12h
[root@dcpoth24213118 ~]# ip r s
default via 6.48.248.129 dev eth1
6.48.248.128/26 dev eth1 proto kernel scope link src 6.48.248.145
10.32.0.0/12 dev weave proto kernel scope link src 10.32.0.1
10.155.0.0/24 via 6.48.248.129 dev eth1
10.228.0.0/24 via 6.48.248.129 dev eth1
10.229.0.0/24 via 6.48.248.129 dev eth1
10.250.0.0/24 via 6.48.248.129 dev eth1
I’ve got weave network plugin installed. The issue is that I cannot create any other pods, all will get stuck in the ContainerCreating state.
I’ve run out of ideas how to fix it. Can someone give me a hint ?