I want to commend you on the work you do and i love that soldierly "right!" let's get this stuff going type of vibe :) you helped me in my work immensly. Keep up the good work, rock on!
Thanks for excellent stuff as always Venkat. Though these concepts are very interesting,but most of them moving to managed k8s, cluster how this knowledge and hands on will help us.
Hi Zaheer, thanks for your interest in this channel. I have done series of videos on external etcd. I have to check what setup i used in those videos. Might be a separate load balancer. If you search in my channel you can find those videos.
Hi, have you created any video on how to add a extra external etcd to HA cluster after k8s cluster is created ? for example after 1 month of my self managed cluster I want to add one more etcd for some reason or let's say delete one etcd node and replace it with new one. if not can you please create a new video on that please.
i've a question can i make more than one k8s cluster with same master node ? what i mean i have 5 node one of them will be shared master with two cluster (every cluster have shared master with 2 worker node )
Interesting. You could actually do that I believe but you will have to run api-servers on a different ports for different cluster on that shared master node. Why do you want to do that actually?
Hi Venkat, what happens when all ETCD nodes go down such as power outage situation? would you be kind enough to do a video on automatic snapshot & restore/recovery for etcd & perhaps the cluster itself?
Thank you very much Venkat for the very helpful video. I would need it in my next project. Does it makes sense to install etcd on the three k3s servers or should they be extra machines? Would it not be wasting of resources. If it runs direcly on the k3s server, but three time it would also be highly available as also the k3s servers would be? By the way, how about the multiple editing in the three terminals. Is this a feature of tmux, which I don't know? Thanks in advance!
Hi Jan, thanks for watching. Basically these are two differenct approaches. 1. External Etcd - separate set of machines running etcd processes, not dependent on control planes, control planes crashing won't affect etcd cluster, recommended setup for production use cases 2. Stacked Topology - each control plane will have an etcd process, less number of machines, control plane crashing will also take etcd member out you can decide on what is appropriate for your use case. Regarding multiple editing in 3 terminals, its a feature in Tmux where you can synchronize panes so that when you type on one of them, it gets typed on other panes as well. medium.com/@bingorabbit/tmux-propagate-to-all-panes-9d2bfb969f01
@@justmeandopensource Thanks for answering. I'm aware that if control-plane and etcd would run on the same machine, their availability would be depending on each other. But for high availability I would have three of them, as you suggested. So if the one etcd would be down because of the control-plane, then two other etcd instances would be up. Wouldn't this be safe enough for the high availability?
Hi Venkat, I found set of commands to secure HA ETCD cluster using kubeadm utility kubeadm init phase certs etcd-server kubeadm init phase certs etcd-peer kubeadm init phase certs etcd-healthcheck-client kubeadm init phase certs apiserver-etcd-client Also to renew the certs for the same below are the commands: kubeadm alpha certs renew etcd-peer; kubeadm alpha certs renew etcd-server; kubeadm alpha certs renew apiserver-etcd-client;kubeadm alpha certs renew etcd-healthcheck-client Could you please throw some light on this ? Is there any other way to generate certificate for ETCD like above commands ? Please make a video on the same Thanks in advance.
Good day Venkat! Do you provide consultation services for businesses interested in learning Kubernetes topics covered in your videos? If so, what is the best way to reach you on this topic?
@@justmeandopensource although disappointing for immediate reasons, I'm glad to hear that you can still provide the content for the community. Thank you for the response!
![[ Kube 105 ] Renewing Kubernetes certificates with Kubeadm](http://i.ytimg.com/vi/h6YtDQ-Qtsk/mqdefault.jpg)
![[ Kube 105 ] Renewing Kubernetes certificates with Kubeadm](/img/tr.png)
![[ Kube 1.5 ] Set up highly available Kubernetes cluster step by step | Keepalived & Haproxy](http://i.ytimg.com/vi/SueeqeioyKY/mqdefault.jpg)
It is my first video ever that I've liked even before it started playing.. :)
Many thanks. Much appreciated.
@@justmeandopensource All thanks to you and your contributions sir!
@@aghahasaan No worries. Cheers.
I want to commend you on the work you do and i love that soldierly "right!" let's get this stuff going type of vibe :) you helped me in my work immensly. Keep up the good work, rock on!
Hi, many thanks for watching. Cheers.
Thanks for excellent stuff as always Venkat. Though these concepts are very interesting,but most of them moving to managed k8s, cluster how this knowledge and hands on will help us.
Its always good to know how stuff works even when you are using managed services. Thanks for watching.
@@justmeandopensource thanks for your videos :)
@@rainbowp19 You are welcome.
excellent stuff my friend.
please keep up the good work.
Hi, Thanks for watching.
Great video Venkat, thank you bro
Thanks for watching.
Hi
I learned alot from your channel. Do you have video on "LB infront of External ETCD Cluster"
Regards
Hi Zaheer, thanks for your interest in this channel. I have done series of videos on external etcd. I have to check what setup i used in those videos. Might be a separate load balancer. If you search in my channel you can find those videos.
Hi, have you created any video on how to add a extra external etcd to HA cluster after k8s cluster is created ? for example after 1 month of my self managed cluster I want to add one more etcd for some reason or let's say delete one etcd node and replace it with new one. if not can you please create a new video on that please.
i've a question
can i make more than one k8s cluster with same master node ?
what i mean i have 5 node one of them will be shared master with two cluster (every cluster have shared master with 2 worker node )
Interesting. You could actually do that I believe but you will have to run api-servers on a different ports for different cluster on that shared master node. Why do you want to do that actually?
how to renew external etcd service certificates on k8s cluster installed with kubeadm I hope you do video about it
Hi Venkat, what happens when all ETCD nodes go down such as power outage situation? would you be kind enough to do a video on automatic snapshot & restore/recovery for etcd & perhaps the cluster itself?
Thank you very much Venkat for the very helpful video. I would need it in my next project. Does it makes sense to install etcd on the three k3s servers or should they be extra machines? Would it not be wasting of resources. If it runs direcly on the k3s server, but three time it would also be highly available as also the k3s servers would be? By the way, how about the multiple editing in the three terminals. Is this a feature of tmux, which I don't know? Thanks in advance!
Hi Jan, thanks for watching.
Basically these are two differenct approaches.
1. External Etcd - separate set of machines running etcd processes, not dependent on control planes, control planes crashing won't affect etcd cluster, recommended setup for production use cases
2. Stacked Topology - each control plane will have an etcd process, less number of machines, control plane crashing will also take etcd member out
you can decide on what is appropriate for your use case.
Regarding multiple editing in 3 terminals, its a feature in Tmux where you can synchronize panes so that when you type on one of them, it gets typed on other panes as well.
medium.com/@bingorabbit/tmux-propagate-to-all-panes-9d2bfb969f01
@@justmeandopensource Thanks for answering. I'm aware that if control-plane and etcd would run on the same machine, their availability would be depending on each other. But for high availability I would have three of them, as you suggested. So if the one etcd would be down because of the control-plane, then two other etcd instances would be up. Wouldn't this be safe enough for the high availability?
@@reabnja From HA point of view, yeah thats fine. But again I wouldn't recommend such an architecture in production.
i get the error when i reload start the etcd service,
Job for etcd.service failed because the control process exited with error code.
Hi Venkat, I found set of commands to secure HA ETCD cluster using kubeadm utility
kubeadm init phase certs etcd-server
kubeadm init phase certs etcd-peer
kubeadm init phase certs etcd-healthcheck-client
kubeadm init phase certs apiserver-etcd-client
Also to renew the certs for the same below are the commands:
kubeadm alpha certs renew etcd-peer; kubeadm alpha certs renew etcd-server; kubeadm alpha certs renew apiserver-etcd-client;kubeadm alpha certs renew etcd-healthcheck-client
Could you please throw some light on this ?
Is there any other way to generate certificate for ETCD like above commands ?
Please make a video on the same Thanks in advance.
Good day Venkat! Do you provide consultation services for businesses interested in learning Kubernetes topics covered in your videos? If so, what is the best way to reach you on this topic?
Hi, thanks for reaching out. I am afraid I don't have time to do consulation service. I am doing these videos on my free time which is very sparse.
@@justmeandopensource although disappointing for immediate reasons, I'm glad to hear that you can still provide the content for the community. Thank you for the response!
@@illmatik0ne241 No worries. Cheers.
Hi Venkat please start course about KVM virtualization, thank you 🌹
Hi Ali, thanks for watching. I can try. Cheers.
@@justmeandopensource thank you very much 🌹
Request tutorial database maria galera cluster in kubernetes cluster
I will see if I can do that. Cheers.
@@justmeandopensource thanks
@@dharmaputra7394 you are welcome.