Managing ReplicaSets

Use ReplicaSets to create and manage the number of pods in a deployment.

ReplicaSets ensure that the correct number of pods are running at all times. Pods that are managed by ReplicaSets are automatically rescheduled when a failure occurs. These failures include node or network issues.

ReplicaSets replaces the Replication Controller as the pod manager. For more information about ReplicaSets, see https://kubernetes.io/docs/concepts/workloads/controllers/replicaset/ .

To view a list of all ReplicaSets in the cluster, from the navigation menu, click Workloads > ReplicaSets. From this view, you can also filter ReplicaSets by their namespace.

Required user type or access level: Cluster administrator or team administrator

• Creating ReplicaSets
• Scaling a ReplicaSet
• Updating a ReplicaSet

Creating ReplicaSets

1. From the navigation menu, click Workloads > ReplicaSets.
2. From the namespace drop-down menu, select a namespace. If a namespace is not selected, the ReplicaSet is created in the default namespace.
3. Click Create ReplicaSet.

4. Provide the details for your ReplicaSet. You must provide values for several parameters:

5. On the General tab, provide these values:

   • Name - A name for your ReplicaSet
   • Replicas - The number of pods or replicas. The default value is 3.

6. On the Container settings tab, provide these values:

   • Name - A name for the container.

   • Image - The image to use for the container. If you use an image from the private image registry, you must provide the image name in the following format. <cluster_CA_domain> is the certificate authority (CA) domain that was set in the config.yaml file during installation.

     <cluster_CA_domain>:8500/namespace/imagename
     

   • Protocol and Container Port - The communications protocol and port number for the container. Note: Values for other parameters are optional.

7. Click Create.

Scaling a ReplicaSet

1. From the navigation menu, click Workloads > ReplicaSets.
2. For the ReplicaSet that you want to scale, select Action > Scale.
3. Specify the number of pods or instances that you want.
4. Click Scale ReplicaSet.

Updating a ReplicaSet

1. From the navigation menu, click Workloads > ReplicaSets.
2. For the ReplicaSet that you want to modify, select Action > Edit. The ReplicaSet's JSON file is displayed.
3. Update the properties.
4. Click Submit. The ReplicaSet updates.