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Merge pull request #2262 from ManuelSimon/update-controlplane-nodes

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[Rancher2] Docs: Migrate controlplane troubleshooting guide from RKE/Docker to RKE2/K3s/containerd
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Sunil Singh
2026-04-15 10:19:02 -07:00
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commit 8a5dda6521
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docs/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes.md
+58 -20
View File
@@ -6,31 +6,55 @@ title: Troubleshooting Controlplane Nodes
<link rel="canonical" href="https://ranchermanager.docs.rancher.com/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes"/> <link rel="canonical" href="https://ranchermanager.docs.rancher.com/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes"/>
</head> </head>
This section applies to nodes with the `controlplane` role. This section applies to nodes with the `controlplane` role in RKE2 and K3s clusters.
## Check if the Controlplane Containers are Running ## Prerequisites
There are three specific containers launched on nodes with the `controlplane` role: As RKE2 and K3s rely on `containerd` as the container runtime, `crictl` replaces Docker for container management. Before proceeding with the troubleshooting commands, configure your environment by exporting the following variables:
### RKE2
```bash
export PATH=$PATH:/var/lib/rancher/rke2/bin/
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
```
### K3s
```bash
export PATH=$PATH:/usr/local/bin
export CRI_CONFIG_FILE=/var/lib/rancher/k3s/agent/etc/crictl.yaml
```
## Check if the Controlplane Components are Running
**RKE2**: There are three specific containers launched on nodes with the `controlplane` role:
* `kube-apiserver` * `kube-apiserver`
* `kube-controller-manager` * `kube-controller-manager`
* `kube-scheduler` * `kube-scheduler`
The containers should have status **Up**. The duration shown after **Up** is the time the container has been running. The containers should have state **Running**. You can check this using `crictl`:
``` ```bash
docker ps -a -f=name='kube-apiserver|kube-controller-manager|kube-scheduler' crictl ps | grep -E 'kube-apiserver|kube-controller-manager|kube-scheduler'
``` ```
Example output: Example output:
``` ```
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID POD NAMESPACE
26c7159abbcc rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-apiserver deb8a96948594 138b1e685e151 11 days ago Running kube-controller-manager 0 0996426295dc5 kube-controller-manager kube-system
f3d287ca4549 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-scheduler f5abb4c7846e4 138b1e685e151 11 days ago Running kube-scheduler 0 80cd9f30af0be kube-scheduler kube-system
bdf3898b8063 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-controller-manager ecd8a6991c22a 138b1e685e151 11 days ago Running kube-apiserver 0 58e042fabe78c kube-apiserver kube-system
``` ```
## Controlplane Container Logging **K3s**: These components run as embedded processes within the K3s service. They do not run as separate containers, so their status is tied to the `k3s` systemd service:
```bash
systemctl status k3s
```
## Controlplane Logging
:::note :::note
@@ -38,18 +62,32 @@ If you added multiple nodes with the `controlplane` role, both `kube-controller-
::: :::
The logging of the containers can contain information on what the problem could be. The logs can contain information on what the problem could be.
``` **RKE2**:
docker logs kube-apiserver ```bash
docker logs kube-controller-manager crictl logs $(crictl ps --name kube-apiserver -q)
docker logs kube-scheduler crictl logs $(crictl ps --name kube-controller-manager -q)
crictl logs $(crictl ps --name kube-scheduler -q)
``` ```
## RKE2 Server Logging **K3s**:
```bash
If Rancher provisions an RKE2 cluster that can't communicate with Rancher, you can run this command on a server node in the downstream cluster to get the RKE2 server logs: journalctl -u k3s | grep -i "kube-apiserver"
journalctl -u k3s | grep -i "kube-controller-manager"
journalctl -u k3s | grep -i "kube-scheduler"
``` ```
## RKE2/K3s Server Logging
If Rancher provisions an RKE2 or K3s cluster that can't communicate with Rancher, you can run this command on a server node in the downstream cluster to get the server logs:
**RKE2**:
```bash
journalctl -u rke2-server -f journalctl -u rke2-server -f
```
**K3s**:
```bash
journalctl -u k3s -f
``` ```
versioned_docs/version-2.12/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes.md
+58 -20
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@@ -6,31 +6,55 @@ title: Troubleshooting Controlplane Nodes
<link rel="canonical" href="https://ranchermanager.docs.rancher.com/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes"/> <link rel="canonical" href="https://ranchermanager.docs.rancher.com/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes"/>
</head> </head>
This section applies to nodes with the `controlplane` role. This section applies to nodes with the `controlplane` role in RKE2 and K3s clusters.
## Check if the Controlplane Containers are Running ## Prerequisites
There are three specific containers launched on nodes with the `controlplane` role: As RKE2 and K3s rely on `containerd` as the container runtime, `crictl` replaces Docker for container management. Before proceeding with the troubleshooting commands, configure your environment by exporting the following variables:
### RKE2
```bash
export PATH=$PATH:/var/lib/rancher/rke2/bin/
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
```
### K3s
```bash
export PATH=$PATH:/usr/local/bin
export CRI_CONFIG_FILE=/var/lib/rancher/k3s/agent/etc/crictl.yaml
```
## Check if the Controlplane Components are Running
**RKE2**: There are three specific containers launched on nodes with the `controlplane` role:
* `kube-apiserver` * `kube-apiserver`
* `kube-controller-manager` * `kube-controller-manager`
* `kube-scheduler` * `kube-scheduler`
The containers should have status **Up**. The duration shown after **Up** is the time the container has been running. The containers should have state **Running**. You can check this using `crictl`:
``` ```bash
docker ps -a -f=name='kube-apiserver|kube-controller-manager|kube-scheduler' crictl ps | grep -E 'kube-apiserver|kube-controller-manager|kube-scheduler'
``` ```
Example output: Example output:
``` ```
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID POD NAMESPACE
26c7159abbcc rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-apiserver deb8a96948594 138b1e685e151 11 days ago Running kube-controller-manager 0 0996426295dc5 kube-controller-manager kube-system
f3d287ca4549 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-scheduler f5abb4c7846e4 138b1e685e151 11 days ago Running kube-scheduler 0 80cd9f30af0be kube-scheduler kube-system
bdf3898b8063 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-controller-manager ecd8a6991c22a 138b1e685e151 11 days ago Running kube-apiserver 0 58e042fabe78c kube-apiserver kube-system
``` ```
## Controlplane Container Logging **K3s**: These components run as embedded processes within the K3s service. They do not run as separate containers, so their status is tied to the `k3s` systemd service:
```bash
systemctl status k3s
```
## Controlplane Logging
:::note :::note
@@ -38,18 +62,32 @@ If you added multiple nodes with the `controlplane` role, both `kube-controller-
::: :::
The logging of the containers can contain information on what the problem could be. The logs can contain information on what the problem could be.
``` **RKE2**:
docker logs kube-apiserver ```bash
docker logs kube-controller-manager crictl logs $(crictl ps --name kube-apiserver -q)
docker logs kube-scheduler crictl logs $(crictl ps --name kube-controller-manager -q)
crictl logs $(crictl ps --name kube-scheduler -q)
``` ```
## RKE2 Server Logging **K3s**:
```bash
If Rancher provisions an RKE2 cluster that can't communicate with Rancher, you can run this command on a server node in the downstream cluster to get the RKE2 server logs: journalctl -u k3s | grep -i "kube-apiserver"
journalctl -u k3s | grep -i "kube-controller-manager"
journalctl -u k3s | grep -i "kube-scheduler"
``` ```
## RKE2/K3s Server Logging
If Rancher provisions an RKE2 or K3s cluster that can't communicate with Rancher, you can run this command on a server node in the downstream cluster to get the server logs:
**RKE2**:
```bash
journalctl -u rke2-server -f journalctl -u rke2-server -f
```
**K3s**:
```bash
journalctl -u k3s -f
``` ```
versioned_docs/version-2.13/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes.md
+58 -20
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@@ -6,31 +6,55 @@ title: Troubleshooting Controlplane Nodes
<link rel="canonical" href="https://ranchermanager.docs.rancher.com/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes"/> <link rel="canonical" href="https://ranchermanager.docs.rancher.com/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes"/>
</head> </head>
This section applies to nodes with the `controlplane` role. This section applies to nodes with the `controlplane` role in RKE2 and K3s clusters.
## Check if the Controlplane Containers are Running ## Prerequisites
There are three specific containers launched on nodes with the `controlplane` role: As RKE2 and K3s rely on `containerd` as the container runtime, `crictl` replaces Docker for container management. Before proceeding with the troubleshooting commands, configure your environment by exporting the following variables:
### RKE2
```bash
export PATH=$PATH:/var/lib/rancher/rke2/bin/
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
```
### K3s
```bash
export PATH=$PATH:/usr/local/bin
export CRI_CONFIG_FILE=/var/lib/rancher/k3s/agent/etc/crictl.yaml
```
## Check if the Controlplane Components are Running
**RKE2**: There are three specific containers launched on nodes with the `controlplane` role:
* `kube-apiserver` * `kube-apiserver`
* `kube-controller-manager` * `kube-controller-manager`
* `kube-scheduler` * `kube-scheduler`
The containers should have status **Up**. The duration shown after **Up** is the time the container has been running. The containers should have state **Running**. You can check this using `crictl`:
``` ```bash
docker ps -a -f=name='kube-apiserver|kube-controller-manager|kube-scheduler' crictl ps | grep -E 'kube-apiserver|kube-controller-manager|kube-scheduler'
``` ```
Example output: Example output:
``` ```
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID POD NAMESPACE
26c7159abbcc rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-apiserver deb8a96948594 138b1e685e151 11 days ago Running kube-controller-manager 0 0996426295dc5 kube-controller-manager kube-system
f3d287ca4549 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-scheduler f5abb4c7846e4 138b1e685e151 11 days ago Running kube-scheduler 0 80cd9f30af0be kube-scheduler kube-system
bdf3898b8063 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-controller-manager ecd8a6991c22a 138b1e685e151 11 days ago Running kube-apiserver 0 58e042fabe78c kube-apiserver kube-system
``` ```
## Controlplane Container Logging **K3s**: These components run as embedded processes within the K3s service. They do not run as separate containers, so their status is tied to the `k3s` systemd service:
```bash
systemctl status k3s
```
## Controlplane Logging
:::note :::note
@@ -38,18 +62,32 @@ If you added multiple nodes with the `controlplane` role, both `kube-controller-
::: :::
The logging of the containers can contain information on what the problem could be. The logs can contain information on what the problem could be.
``` **RKE2**:
docker logs kube-apiserver ```bash
docker logs kube-controller-manager crictl logs $(crictl ps --name kube-apiserver -q)
docker logs kube-scheduler crictl logs $(crictl ps --name kube-controller-manager -q)
crictl logs $(crictl ps --name kube-scheduler -q)
``` ```
## RKE2 Server Logging **K3s**:
```bash
If Rancher provisions an RKE2 cluster that can't communicate with Rancher, you can run this command on a server node in the downstream cluster to get the RKE2 server logs: journalctl -u k3s | grep -i "kube-apiserver"
journalctl -u k3s | grep -i "kube-controller-manager"
journalctl -u k3s | grep -i "kube-scheduler"
``` ```
## RKE2/K3s Server Logging
If Rancher provisions an RKE2 or K3s cluster that can't communicate with Rancher, you can run this command on a server node in the downstream cluster to get the server logs:
**RKE2**:
```bash
journalctl -u rke2-server -f journalctl -u rke2-server -f
```
**K3s**:
```bash
journalctl -u k3s -f
``` ```
versioned_docs/version-2.14/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes.md
+58 -20
View File
@@ -6,31 +6,55 @@ title: Troubleshooting Controlplane Nodes
<link rel="canonical" href="https://ranchermanager.docs.rancher.com/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes"/> <link rel="canonical" href="https://ranchermanager.docs.rancher.com/troubleshooting/kubernetes-components/troubleshooting-controlplane-nodes"/>
</head> </head>
This section applies to nodes with the `controlplane` role. This section applies to nodes with the `controlplane` role in RKE2 and K3s clusters.
## Check if the Controlplane Containers are Running ## Prerequisites
There are three specific containers launched on nodes with the `controlplane` role: As RKE2 and K3s rely on `containerd` as the container runtime, `crictl` replaces Docker for container management. Before proceeding with the troubleshooting commands, configure your environment by exporting the following variables:
### RKE2
```bash
export PATH=$PATH:/var/lib/rancher/rke2/bin/
export CRI_CONFIG_FILE=/var/lib/rancher/rke2/agent/etc/crictl.yaml
```
### K3s
```bash
export PATH=$PATH:/usr/local/bin
export CRI_CONFIG_FILE=/var/lib/rancher/k3s/agent/etc/crictl.yaml
```
## Check if the Controlplane Components are Running
**RKE2**: There are three specific containers launched on nodes with the `controlplane` role:
* `kube-apiserver` * `kube-apiserver`
* `kube-controller-manager` * `kube-controller-manager`
* `kube-scheduler` * `kube-scheduler`
The containers should have status **Up**. The duration shown after **Up** is the time the container has been running. The containers should have state **Running**. You can check this using `crictl`:
``` ```bash
docker ps -a -f=name='kube-apiserver|kube-controller-manager|kube-scheduler' crictl ps | grep -E 'kube-apiserver|kube-controller-manager|kube-scheduler'
``` ```
Example output: Example output:
``` ```
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID POD NAMESPACE
26c7159abbcc rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-apiserver deb8a96948594 138b1e685e151 11 days ago Running kube-controller-manager 0 0996426295dc5 kube-controller-manager kube-system
f3d287ca4549 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-scheduler f5abb4c7846e4 138b1e685e151 11 days ago Running kube-scheduler 0 80cd9f30af0be kube-scheduler kube-system
bdf3898b8063 rancher/hyperkube:v1.11.5-rancher1 "/opt/rke-tools/en..." 3 hours ago Up 3 hours kube-controller-manager ecd8a6991c22a 138b1e685e151 11 days ago Running kube-apiserver 0 58e042fabe78c kube-apiserver kube-system
``` ```
## Controlplane Container Logging **K3s**: These components run as embedded processes within the K3s service. They do not run as separate containers, so their status is tied to the `k3s` systemd service:
```bash
systemctl status k3s
```
## Controlplane Logging
:::note :::note
@@ -38,18 +62,32 @@ If you added multiple nodes with the `controlplane` role, both `kube-controller-
::: :::
The logging of the containers can contain information on what the problem could be. The logs can contain information on what the problem could be.
``` **RKE2**:
docker logs kube-apiserver ```bash
docker logs kube-controller-manager crictl logs $(crictl ps --name kube-apiserver -q)
docker logs kube-scheduler crictl logs $(crictl ps --name kube-controller-manager -q)
crictl logs $(crictl ps --name kube-scheduler -q)
``` ```
## RKE2 Server Logging **K3s**:
```bash
If Rancher provisions an RKE2 cluster that can't communicate with Rancher, you can run this command on a server node in the downstream cluster to get the RKE2 server logs: journalctl -u k3s | grep -i "kube-apiserver"
journalctl -u k3s | grep -i "kube-controller-manager"
journalctl -u k3s | grep -i "kube-scheduler"
``` ```
## RKE2/K3s Server Logging
If Rancher provisions an RKE2 or K3s cluster that can't communicate with Rancher, you can run this command on a server node in the downstream cluster to get the server logs:
**RKE2**:
```bash
journalctl -u rke2-server -f journalctl -u rke2-server -f
```
**K3s**:
```bash
journalctl -u k3s -f
``` ```