Lab 3.6 - node is not ready once /etc/containerd/config.toml is changed the second time
The instructions in containerd-setup.txt tells first to set /etc/containerd/config.toml
to
- version = 2
- #disabled_plugins = ["cri"]
- [plugins."io.containerd.runtime.v1.linux"]
- shim_debug = true
- [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
- runtime_type = "io.containerd.runc.v2"
- [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runsc]
- runtime_type = "io.containerd.runsc.v1"
And then later on to
- disabled_plugins = ["restart"]
- [plugins.linux]
- shim_debug = true
- [plugins.cri.containerd.runtimes.runsc]
- runtime_type = "io.containerd.runsc.v1"
My problem is that the node becomes not ready with the second version.
Please, observe:
The first variant - all is good
- student@master:/etc/containerd$ cat config.toml
- version = 2
- #disabled_plugins = ["cri"]
- [plugins."io.containerd.runtime.v1.linux"]
- shim_debug = true
- [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
- runtime_type = "io.containerd.runc.v2"
- [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runsc]
- runtime_type = "io.containerd.runsc.v1"
- student@master:/etc/containerd$ systemctl status containerd.service | head -5
- ● containerd.service - containerd container runtime
- Loaded: loaded (/lib/systemd/system/containerd.service; enabled; vendor preset: enabled)
- Active: active (running) since Sun 2022-12-18 20:35:41 UTC; 54min ago
- Docs: https://containerd.io
- Process: 145675 ExecStartPre=/sbin/modprobe overlay (code=exited, status=0/SUCCESS)
- student@master:/etc/containerd$ k get node
- NAME STATUS ROLES AGE VERSION
- master Ready control-plane,master 3h35m v1.23.1
- student@master:/etc/containerd$
The second variant - node becomes not ready
- student@master:/etc/containerd$ sudo ln --force -s config.toml.v2 config.toml
- student@master:/etc/containerd$ cat config.toml
- disabled_plugins = ["restart"]
- [plugins.linux]
- shim_debug = true
- [plugins.cri.containerd.runtimes.runsc]
- runtime_type = "io.containerd.runsc.v1"
- student@master:/etc/containerd$ sudo systemctl restart containerd.service
- student@master:/etc/containerd$ systemctl status containerd.service | head -5
- ● containerd.service - containerd container runtime
- Loaded: loaded (/lib/systemd/system/containerd.service; enabled; vendor preset: enabled)
- Active: active (running) since Sun 2022-12-18 21:31:11 UTC; 4s ago
- Docs: https://containerd.io
- Process: 176547 ExecStartPre=/sbin/modprobe overlay (code=exited, status=0/SUCCESS)
- student@master:/etc/containerd$ k get node
- NAME STATUS ROLES AGE VERSION
- master Ready control-plane,master 3h36m v1.23.1
- student@master:/etc/containerd$ sleep 30
- student@master:/etc/containerd$ k get node
- NAME STATUS ROLES AGE VERSION
- master NotReady control-plane,master 3h37m v1.23.1
- student@master:/etc/containerd$
Switch back to the first variant - all is good
- student@master:/etc/containerd$ sudo ln --force -s config.toml.v1 config.toml
- student@master:/etc/containerd$ cat config.toml
- version = 2
- #disabled_plugins = ["cri"]
- [plugins."io.containerd.runtime.v1.linux"]
- shim_debug = true
- [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
- runtime_type = "io.containerd.runc.v2"
- [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runsc]
- runtime_type = "io.containerd.runsc.v1"
- student@master:/etc/containerd$ sudo systemctl restart containerd.service
- student@master:/etc/containerd$ systemctl status containerd.service | head -5
- ● containerd.service - containerd container runtime
- Loaded: loaded (/lib/systemd/system/containerd.service; enabled; vendor preset: enabled)
- Active: active (running) since Sun 2022-12-18 21:33:03 UTC; 4s ago
- Docs: https://containerd.io
- Process: 176798 ExecStartPre=/sbin/modprobe overlay (code=exited, status=0/SUCCESS)
- student@master:/etc/containerd$ k get node
- NAME STATUS ROLES AGE VERSION
- master Ready control-plane,master 3h38m v1.23.1
- student@master:/etc/containerd$
When the second variant is selected:
- student@master:/etc/containerd$ k describe node | tail -5
- Normal NodeHasSufficientPID 3m22s kubelet Node master status is now: NodeHasSufficientPID
- Normal NodeAllocatableEnforced 3m21s kubelet Updated Node Allocatable limit across pods
- Normal NodeReady 3m21s kubelet Node master status is now: NodeReady
- Normal NodeNotReady 59s (x2 over 3m22s) kubelet Node master status is now: NodeNotReady
- Warning ContainerGCFailed 22s (x2 over 82s) kubelet rpc error: code = Unimplemented desc = unknown service runtime.v1alpha2.RuntimeService
- student@master:/etc/containerd$
Your help is greatly appreciated.
Answers
-
Hi @mark.kharitonov,
I would recommend continuing the lab with the config.toml that allows the node to become ready.
Regards,
-Chris0 -
I guess I have no other choice, but I would like to understand what is wrong. After all, these are the instructions. I hope this will not impede me from doing the lab.
0 -
Hi @mark.kharitonov,
Yes, I got the same issue.
May any one help to explain more detail about this and how to fix this issue?Thank you.
0 -
Hi @dennis6,
Please use the config.toml configuration that brings the node to a ready state, as suggested above.
Regards,
-Chris0
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