VMs running kubernetes clusters go down periodically
up vote
0
down vote
favorite
We are running several kubernetes clusters on a few hundred VMs. A few VMs go down every week. We bring it back up. Our metrics show that the CPU & memory usage are low to moderate on these VMs when they go down. Other VM metrics (like the network traffic) also don't point to any unusual patterns. There are no specific messages in /var/log/messages when the VMs go down.
Kubernetes version: 1.9
Linux kernel version: 4.1.12-124.19.5.el7uek.x86_64
Are there other logs or diagnostic information we can check to get to the root cause of the VM outages.
kubernetes virtual-machine asked Nov 10 at 10:47
sengs
2,68162323
add a comment |
up vote
0
down vote
favorite
We are running several kubernetes clusters on a few hundred VMs. A few VMs go down every week. We bring it back up. Our metrics show that the CPU & memory usage are low to moderate on these VMs when they go down. Other VM metrics (like the network traffic) also don't point to any unusual patterns. There are no specific messages in /var/log/messages when the VMs go down.
Kubernetes version: 1.9
Linux kernel version: 4.1.12-124.19.5.el7uek.x86_64
Are there other logs or diagnostic information we can check to get to the root cause of the VM outages.
kubernetes virtual-machine asked Nov 10 at 10:47
sengs
2,68162323
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
We are running several kubernetes clusters on a few hundred VMs. A few VMs go down every week. We bring it back up. Our metrics show that the CPU & memory usage are low to moderate on these VMs when they go down. Other VM metrics (like the network traffic) also don't point to any unusual patterns. There are no specific messages in /var/log/messages when the VMs go down.
Kubernetes version: 1.9
Linux kernel version: 4.1.12-124.19.5.el7uek.x86_64
Are there other logs or diagnostic information we can check to get to the root cause of the VM outages.
kubernetes virtual-machine asked Nov 10 at 10:47
sengs
2,68162323
We are running several kubernetes clusters on a few hundred VMs. A few VMs go down every week. We bring it back up. Our metrics show that the CPU & memory usage are low to moderate on these VMs when they go down. Other VM metrics (like the network traffic) also don't point to any unusual patterns. There are no specific messages in /var/log/messages when the VMs go down.
Kubernetes version: 1.9
Linux kernel version: 4.1.12-124.19.5.el7uek.x86_64
Are there other logs or diagnostic information we can check to get to the root cause of the VM outages.
kubernetes virtual-machine kubernetes virtual-machine asked Nov 10 at 10:47
sengs
2,68162323
asked Nov 10 at 10:47
sengs
2,68162323
asked Nov 10 at 10:47
sengs
2,68162323
asked Nov 10 at 10:47
sengs
2,68162323
asked Nov 10 at 10:47
sengs
2,68162323
2,68162323
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
Usually we also check the host journal especially if you are running kubelet as systemd.
There is a good tutorial on digitalocean explaining journald.
https://www.digitalocean.com/community/tutorials/how-to-use-journalctl-to-view-and-manipulate-systemd-logs
It might give you some clue as to why your kube nodes are crashing.
answered Nov 11 at 21:24
Bal Chua
42215
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
Usually we also check the host journal especially if you are running kubelet as systemd.
There is a good tutorial on digitalocean explaining journald.
https://www.digitalocean.com/community/tutorials/how-to-use-journalctl-to-view-and-manipulate-systemd-logs
It might give you some clue as to why your kube nodes are crashing.
answered Nov 11 at 21:24
Bal Chua
42215
add a comment |
up vote
1
down vote
Usually we also check the host journal especially if you are running kubelet as systemd.
There is a good tutorial on digitalocean explaining journald.
https://www.digitalocean.com/community/tutorials/how-to-use-journalctl-to-view-and-manipulate-systemd-logs
It might give you some clue as to why your kube nodes are crashing.
answered Nov 11 at 21:24
Bal Chua
42215
add a comment |
up vote
1
down vote
up vote
1
down vote
Usually we also check the host journal especially if you are running kubelet as systemd.
There is a good tutorial on digitalocean explaining journald.
https://www.digitalocean.com/community/tutorials/how-to-use-journalctl-to-view-and-manipulate-systemd-logs
It might give you some clue as to why your kube nodes are crashing.
answered Nov 11 at 21:24
Bal Chua
42215
Usually we also check the host journal especially if you are running kubelet as systemd.
There is a good tutorial on digitalocean explaining journald.
https://www.digitalocean.com/community/tutorials/how-to-use-journalctl-to-view-and-manipulate-systemd-logs
It might give you some clue as to why your kube nodes are crashing.
answered Nov 11 at 21:24
Bal Chua
42215
answered Nov 11 at 21:24
Bal Chua
42215
answered Nov 11 at 21:24
Bal Chua
42215
answered Nov 11 at 21:24
Bal Chua
42215
42215
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53238175%2fvms-running-kubernetes-clusters-go-down-periodically%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
