Kubernetes: no such host for modify hostname slave
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Version: kubeadm and kubectl 1.12
I get this error when I change the hostname of one of the Kubernetes slaves.
The error I get from the metric service:
dial tcp: lookup ops-kube-slave-dev-1 on 10.96.0.10:53: no such host
This IP is not the public or private IP and is completely random.
I add this to the file /etc/hosts:
10.0.1.248 ops-kube-slave-dev-2
10.0.1.154 ops-kube-slave-dev-1
When I execute $ nslookup ops-kube-slave-dev-2, I get the correct IP.
But still the same error. I want to avoid that for every new node I add to create a new certificate again.
What is the best solution for auto join slave node?
kubernetes kube-dns edited Nov 15 '18 at 22:18
Rico
29.8k105472
asked Nov 15 '18 at 15:06
cdemetcdemet
6619
add a comment |
Version: kubeadm and kubectl 1.12
I get this error when I change the hostname of one of the Kubernetes slaves.
The error I get from the metric service:
dial tcp: lookup ops-kube-slave-dev-1 on 10.96.0.10:53: no such host
This IP is not the public or private IP and is completely random.
I add this to the file /etc/hosts:
10.0.1.248 ops-kube-slave-dev-2
10.0.1.154 ops-kube-slave-dev-1
When I execute $ nslookup ops-kube-slave-dev-2, I get the correct IP.
But still the same error. I want to avoid that for every new node I add to create a new certificate again.
What is the best solution for auto join slave node?
kubernetes kube-dns edited Nov 15 '18 at 22:18
Rico
29.8k105472
asked Nov 15 '18 at 15:06
cdemetcdemet
6619
Why you edit and you put the command line with $ , I want to just copy all the line and just run :S
– cdemet
Nov 16 '18 at 7:52
add a comment |
Version: kubeadm and kubectl 1.12
I get this error when I change the hostname of one of the Kubernetes slaves.
The error I get from the metric service:
dial tcp: lookup ops-kube-slave-dev-1 on 10.96.0.10:53: no such host
This IP is not the public or private IP and is completely random.
I add this to the file /etc/hosts:
10.0.1.248 ops-kube-slave-dev-2
10.0.1.154 ops-kube-slave-dev-1
When I execute $ nslookup ops-kube-slave-dev-2, I get the correct IP.
But still the same error. I want to avoid that for every new node I add to create a new certificate again.
What is the best solution for auto join slave node?
kubernetes kube-dns edited Nov 15 '18 at 22:18
Rico
29.8k105472
asked Nov 15 '18 at 15:06
cdemetcdemet
6619
Version: kubeadm and kubectl 1.12
I get this error when I change the hostname of one of the Kubernetes slaves.
The error I get from the metric service:
dial tcp: lookup ops-kube-slave-dev-1 on 10.96.0.10:53: no such host
This IP is not the public or private IP and is completely random.
I add this to the file /etc/hosts:
10.0.1.248 ops-kube-slave-dev-2
10.0.1.154 ops-kube-slave-dev-1
When I execute $ nslookup ops-kube-slave-dev-2, I get the correct IP.
But still the same error. I want to avoid that for every new node I add to create a new certificate again.
What is the best solution for auto join slave node?
kubernetes kube-dns kubernetes kube-dns edited Nov 15 '18 at 22:18
Rico
29.8k105472
asked Nov 15 '18 at 15:06
cdemetcdemet
6619
edited Nov 15 '18 at 22:18
Rico
29.8k105472
asked Nov 15 '18 at 15:06
cdemetcdemet
6619
edited Nov 15 '18 at 22:18
Rico
29.8k105472
edited Nov 15 '18 at 22:18
Rico
29.8k105472
edited Nov 15 '18 at 22:18
Rico
29.8k105472
29.8k105472
asked Nov 15 '18 at 15:06
cdemetcdemet
6619
asked Nov 15 '18 at 15:06
cdemetcdemet
6619
asked Nov 15 '18 at 15:06
cdemetcdemet
6619
6619
Why you edit and you put the command line with $ , I want to just copy all the line and just run :S
– cdemet
Nov 16 '18 at 7:52
add a comment |
Why you edit and you put the command line with $ , I want to just copy all the line and just run :S
– cdemet
Nov 16 '18 at 7:52
Why you edit and you put the command line with $ , I want to just copy all the line and just run :S
– cdemet
Nov 16 '18 at 7:52
Why you edit and you put the command line with $ , I want to just copy all the line and just run :S
– cdemet
Nov 16 '18 at 7:52
add a comment |
1 Answer
1
active
oldest
votes
The solution is to provide --hostname-override option to the kubelet configuration (in my case, /etc/systemd/system/kubelet.service.d/10-kubeadm.conf). Let you allow to change the kubernetes nodename without regenerating the certificates.
For more info, see https://prefetch.net/blog/2017/12/30/getting-your-kubernetes-node-names-right/.
PS: On the secondary note,The IP you're talking about is not random, that is the IP of kubedns service of your cluster. You can check it using $ kubectl get svc -n kube-system.
Hope this helps.
edited Nov 15 '18 at 18:04
Shudipta Sharma
1,242414
answered Nov 15 '18 at 15:33
Prafull LadhaPrafull Ladha
3,9911623
Thanks i will tried it, /usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS --hostname-override I change the last line of the config file and i add the --hostname-override but the service don't start
– cdemet
Nov 15 '18 at 16:10
You need to provide the new hostname of your worker node to it, like --hostname-override=<hostname> . I hope you are doing it on the worker node which name you want to change
– Prafull Ladha
Nov 15 '18 at 16:49
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The solution is to provide --hostname-override option to the kubelet configuration (in my case, /etc/systemd/system/kubelet.service.d/10-kubeadm.conf). Let you allow to change the kubernetes nodename without regenerating the certificates.
For more info, see https://prefetch.net/blog/2017/12/30/getting-your-kubernetes-node-names-right/.
PS: On the secondary note,The IP you're talking about is not random, that is the IP of kubedns service of your cluster. You can check it using $ kubectl get svc -n kube-system.
Hope this helps.
edited Nov 15 '18 at 18:04
Shudipta Sharma
1,242414
answered Nov 15 '18 at 15:33
Prafull LadhaPrafull Ladha
3,9911623
Thanks i will tried it, /usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS --hostname-override I change the last line of the config file and i add the --hostname-override but the service don't start
– cdemet
Nov 15 '18 at 16:10
You need to provide the new hostname of your worker node to it, like --hostname-override=<hostname> . I hope you are doing it on the worker node which name you want to change
– Prafull Ladha
Nov 15 '18 at 16:49
add a comment |
The solution is to provide --hostname-override option to the kubelet configuration (in my case, /etc/systemd/system/kubelet.service.d/10-kubeadm.conf). Let you allow to change the kubernetes nodename without regenerating the certificates.
For more info, see https://prefetch.net/blog/2017/12/30/getting-your-kubernetes-node-names-right/.
PS: On the secondary note,The IP you're talking about is not random, that is the IP of kubedns service of your cluster. You can check it using $ kubectl get svc -n kube-system.
Hope this helps.
edited Nov 15 '18 at 18:04
Shudipta Sharma
1,242414
answered Nov 15 '18 at 15:33
Prafull LadhaPrafull Ladha
3,9911623
Thanks i will tried it, /usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS --hostname-override I change the last line of the config file and i add the --hostname-override but the service don't start
– cdemet
Nov 15 '18 at 16:10
You need to provide the new hostname of your worker node to it, like --hostname-override=<hostname> . I hope you are doing it on the worker node which name you want to change
– Prafull Ladha
Nov 15 '18 at 16:49
add a comment |
The solution is to provide --hostname-override option to the kubelet configuration (in my case, /etc/systemd/system/kubelet.service.d/10-kubeadm.conf). Let you allow to change the kubernetes nodename without regenerating the certificates.
For more info, see https://prefetch.net/blog/2017/12/30/getting-your-kubernetes-node-names-right/.
PS: On the secondary note,The IP you're talking about is not random, that is the IP of kubedns service of your cluster. You can check it using $ kubectl get svc -n kube-system.
Hope this helps.
edited Nov 15 '18 at 18:04
Shudipta Sharma
1,242414
answered Nov 15 '18 at 15:33
Prafull LadhaPrafull Ladha
3,9911623
The solution is to provide --hostname-override option to the kubelet configuration (in my case, /etc/systemd/system/kubelet.service.d/10-kubeadm.conf). Let you allow to change the kubernetes nodename without regenerating the certificates.
For more info, see https://prefetch.net/blog/2017/12/30/getting-your-kubernetes-node-names-right/.
PS: On the secondary note,The IP you're talking about is not random, that is the IP of kubedns service of your cluster. You can check it using $ kubectl get svc -n kube-system.
Hope this helps.
edited Nov 15 '18 at 18:04
Shudipta Sharma
1,242414
answered Nov 15 '18 at 15:33
Prafull LadhaPrafull Ladha
3,9911623
edited Nov 15 '18 at 18:04
Shudipta Sharma
1,242414
edited Nov 15 '18 at 18:04
Shudipta Sharma
1,242414
edited Nov 15 '18 at 18:04
Shudipta Sharma
1,242414
1,242414
answered Nov 15 '18 at 15:33
Prafull LadhaPrafull Ladha
3,9911623
answered Nov 15 '18 at 15:33
Prafull LadhaPrafull Ladha
3,9911623
answered Nov 15 '18 at 15:33
Prafull LadhaPrafull Ladha
3,9911623
3,9911623
Thanks i will tried it, /usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS --hostname-override I change the last line of the config file and i add the --hostname-override but the service don't start
– cdemet
Nov 15 '18 at 16:10
You need to provide the new hostname of your worker node to it, like --hostname-override=<hostname> . I hope you are doing it on the worker node which name you want to change
– Prafull Ladha
Nov 15 '18 at 16:49
add a comment |
Thanks i will tried it, /usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS --hostname-override I change the last line of the config file and i add the --hostname-override but the service don't start
– cdemet
Nov 15 '18 at 16:10
You need to provide the new hostname of your worker node to it, like --hostname-override=<hostname> . I hope you are doing it on the worker node which name you want to change
– Prafull Ladha
Nov 15 '18 at 16:49
Thanks i will tried it, /usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS --hostname-override I change the last line of the config file and i add the --hostname-override but the service don't start
– cdemet
Nov 15 '18 at 16:10
Thanks i will tried it, /usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS --hostname-override I change the last line of the config file and i add the --hostname-override but the service don't start
– cdemet
Nov 15 '18 at 16:10
You need to provide the new hostname of your worker node to it, like --hostname-override=<hostname> . I hope you are doing it on the worker node which name you want to change
– Prafull Ladha
Nov 15 '18 at 16:49
You need to provide the new hostname of your worker node to it, like --hostname-override=<hostname> . I hope you are doing it on the worker node which name you want to change
– Prafull Ladha
Nov 15 '18 at 16:49
add a comment |
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Why you edit and you put the command line with $ , I want to just copy all the line and just run :S
– cdemet
Nov 16 '18 at 7:52