rancher-docs/content/rancher/v2.x/en/faq/technical/_index.md

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Technical	5000

How can I reset the admin password?

Single node install:

$ docker exec -ti <container_id> reset-password
New password for default admin user (user-xxxxx):
<new_password>

High Availability install:

$ KUBECONFIG=./kube_config_rancher-cluster.yml
$ kubectl --kubeconfig $KUBECONFIG exec -n cattle-system $(kubectl --kubeconfig $KUBECONFIG get pods -n cattle-system -o json | jq -r '.items[] | select(.spec.containers[].name=="cattle-server") | .metadata.name') -- reset-password
New password for default admin user (user-xxxxx):
<new_password>

How can I enable debug logging?

• Single node install
• Enable

$ docker exec -ti <container_id> loglevel --set debug
OK
$ docker logs -f <container_id>

• Disable

$ docker exec -ti <container_id> loglevel --set info
OK

• High Availability install
• Enable

$ KUBECONFIG=./kube_config_rancher-cluster.yml
$ kubectl --kubeconfig $KUBECONFIG exec -n cattle-system $(kubectl --kubeconfig $KUBECONFIG get pods -n cattle-system -o json | jq -r '.items[] | select(.spec.containers[].name=="cattle-server") | .metadata.name') -- loglevel --set debug
OK
$ kubectl --kubeconfig $KUBECONFIG logs -n cattle-system -f $(kubectl --kubeconfig $KUBECONFIG get pods -n cattle-system -o json | jq -r '.items[] | select(.spec.containers[].name="cattle-server") | .metadata.name')

• Disable

$ KUBECONFIG=./kube_config_rancher-cluster.yml
$ kubectl --kubeconfig $KUBECONFIG exec -n cattle-system $(kubectl --kubeconfig $KUBECONFIG get pods -n cattle-system -o json | jq -r '.items[] | select(.spec.containers[].name=="cattle-server") | .metadata.name') -- loglevel --set info
OK

My ClusterIP does not respond to ping

ClusterIP is a virtual IP, which will not respond to ping. Best way to test if the ClusterIP is configured correctly, is by using curl to access the IP and port to see if it responds.

Where can I manage Node Templates?

Node Templates can be accessed by opening your account menu (top right) and selecting Node Templates.

Why is my Layer-4 Load Balancer in Pending state?

The Layer-4 Load Balancer is created as type: LoadBalancer. In Kubernetes, this needs a cloud provider or controller that can satisfy these requests, otherwise these will be in Pending state forever. More information can be found on [Cloud Providers]({{< baseurl >}}/rancher/v2.x/en/concepts/clusters/cloud-providers/) or Create External Load Balancer

Where is the state of Rancher stored?

• Single node install: in the embedded etcd of the rancher/rancher container, located at /var/lib/rancher.
• High Availability install: in the etcd of the RKE cluster created to run Rancher.

How are the supported Docker versions determined?

We follow the validated Docker versions for upstream Kubernetes releases. The validated versions can be found under External Dependencies in the Kubernetes release CHANGELOG.md.

How can I access nodes created by Rancher?

SSH keys to access the nodes created by Rancher can be downloaded via the Nodes view. Choose the node which you want to access and click on the vertical ellipsis button at the end of the row, and choose Download Keys as shown in the picture below.


Unzip the downloaded zip file, and use the file id_rsa to connect to you host. Be sure to use the correct username (rancher for RancherOS, ubuntu for Ubuntu, ec2-user for Amazon Linux)

$ ssh -i id_rsa user@ip_of_node

How can I automate task X in Rancher?

The UI consists of static files, and works based on responses of the API. That means every action/task that you can execute in the UI, can be automated via the API. There are 2 ways to do this:

• Visit https://your_rancher_ip/v3 and browse the API options.
• Capture the API calls when using the UI (Most commonly used for this is Chrome Developer Tools but you can use anything you like)