Difference between revisions of "Kubernetes"

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(Certificate expiration)
(Certificate expiration)
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** [[MQTT|MQTT gateway]]
 
** [[MQTT|MQTT gateway]]
 
** gitlab: ongoing
 
** gitlab: ongoing
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 +
=== Access impossible ===
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 +
Sometimes the eth interface is in the sauce (to investigate), you have to reconfigure it.
 +
 +
<pre>
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ubuntu@k8s:~$ sudo ip addr add 62.220.135.219/32 dev ens6
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</pre>
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It should look like this
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<pre>
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ubuntu@k8s:~$ ip -4 a show ens6
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2: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
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    inet 62.220.135.205/26 brd 62.220.135.255 scope global ens6
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      valid_lft forever preferred_lft forever
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    inet 62.220.135.219/32 scope global ens6
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      valid_lft forever preferred_lft forever
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</pre>
  
 
=== Certificate expiration ===
 
=== Certificate expiration ===

Revision as of 08:28, 26 July 2021

Kubernetes @ FIXME

Information

Services

Access impossible

Sometimes the eth interface is in the sauce (to investigate), you have to reconfigure it.

ubuntu@k8s:~$ sudo ip addr add 62.220.135.219/32 dev ens6

It should look like this

ubuntu@k8s:~$ ip -4 a show ens6 
2: ens6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    inet 62.220.135.205/26 brd 62.220.135.255 scope global ens6
       valid_lft forever preferred_lft forever
    inet 62.220.135.219/32 scope global ens6
       valid_lft forever preferred_lft forever

Certificate expiration

Sometimes K8S is in the sauce, something like this might help regenerate the certs

# Service state
systemctl stop kubelet.service
systemctl restart docker.service

# Backup
rsync -av /etc/kubernetes/ /root/kubernetes-$(date +%s)/
rsync -av /var/lib/etcd/ /root/etcd-$(date +%s)/

cd /etc/kubernetes
rm {admin.conf,controller-manager.conf,kubelet.conf,scheduler.conf}

cd /etc/kubernetes/pki
rm {apiserver.crt,apiserver-etcd-client.key,apiserver-kubelet-client.crt,front-proxy-ca.crt,front-proxy-client.crt,front-proxy-client.key,front-proxy-ca.key,apiserver-kubelet-client.key,apiserver.key,apiserver-etcd-client.crt}

# Regen certificates
cd
kubeadm init phase certs all --apiserver-advertise-address 62.220.135.205 --ignore-preflight-errors=all
kubeadm init phase kubeconfig all
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

# Check states
kubeadm join 62.220.135.205:6443 --token XXX --discovery-token-ca-cert-hash YYY --ignore-preflight-errors=all
kubectl get nodes
kubectl get all