VMs running kubernetes clusters go down periodically
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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 2 days ago
sengs
2,66662323
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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 2 days ago
sengs
2,66662323
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 2 days ago
sengs
2,66662323
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 2 days ago
sengs
2,66662323
asked 2 days ago
sengs
2,66662323
asked 2 days ago
sengs
2,66662323
asked 2 days ago
sengs
2,66662323
asked 2 days ago
sengs
2,66662323
2,66662323
add a comment |
add a comment |
1 Answer
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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 yesterday
Bal Chua
36215
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
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 yesterday
Bal Chua
36215
add a comment |
up vote
0
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 yesterday
Bal Chua
36215
add a comment |
up vote
0
down vote
up vote
0
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 yesterday
Bal Chua
36215
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 yesterday
Bal Chua
36215
answered yesterday
Bal Chua
36215
answered yesterday
Bal Chua
36215
answered yesterday
Bal Chua
36215
36215
add a comment |
add a comment |
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