Deploy CockroachDB in a Single Kubernetes Cluster

This page shows you how to start and stop a secure 3-node CockroachDB cluster in a single Kubernetes cluster, using one of the following:

Tip:

To deploy a free CockroachDB Cloud cluster instead of running CockroachDB yourself, see the Quickstart.

Limitations

Kubernetes version

Kubernetes 1.15 or higher is required in order to use our current configuration files. If you need to run on an older version of Kubernetes, we keep configuration files in the versioned subdirectories of the CockroachDB Kubernetes repository (e.g., v1.7).

Kubernetes Operator

The CockroachDB Kubernetes Operator currently deploys clusters in a single region. For multi-region deployments using manual configs, see Orchestrate CockroachDB Across Multiple Kubernetes Clusters.

Helm version

Helm 3.0 or higher is required when using our instructions to deploy via Helm.

The CockroachDB Helm chart is compatible with Kubernetes versions 1.22 and earlier (the latest version as of this writing). However, no new feature development is currently planned.

Resources

When starting Kubernetes, select machines with at least 4 vCPUs and 16 GiB of memory, and provision at least 2 vCPUs and 8 Gi of memory to CockroachDB per pod. These minimum settings are used by default in this deployment guide, and are appropriate for testing purposes only. On a production deployment, you should adjust the resource settings for your workload. For details, see Resource management.

Storage

At this time, orchestrations of CockroachDB with Kubernetes use external persistent volumes that are often replicated by the provider. Because CockroachDB already replicates data automatically, this additional layer of replication is unnecessary and can negatively impact performance. High-performance use cases on a private Kubernetes cluster may want to consider using local volumes.

Step 1. Start Kubernetes

You can use the hosted Google Kubernetes Engine (GKE) service or the hosted Amazon Elastic Kubernetes Service (EKS) to quickly start Kubernetes.

Note:

GKE or EKS are not required to run CockroachDB on Kubernetes. A manual GCE or AWS cluster with the minimum recommended Kubernetes version and at least 3 pods, each presenting sufficient resources to start a CockroachDB node, can also be used.

Hosted GKE

  1. Complete the Before You Begin steps described in the Google Kubernetes Engine Quickstart documentation.

    This includes installing gcloud, which is used to create and delete Kubernetes Engine clusters, and kubectl, which is the command-line tool used to manage Kubernetes from your workstation.

    Tip:

    The documentation offers the choice of using Google's Cloud Shell product or using a local shell on your machine. Choose to use a local shell if you want to be able to view the DB Console using the steps in this guide.

  2. From your local workstation, start the Kubernetes cluster, specifying one of the available regions (e.g., us-east1):

    Tip:

    Since this region can differ from your default gcloud region, be sure to include the --region flag to run gcloud commands against this cluster.

    icon/buttons/copy
    $ gcloud container clusters create cockroachdb --machine-type n2-standard-4 --region {region-name} --num-nodes 1
    
    Creating cluster cockroachdb...done.
    

    This creates GKE instances and joins them into a single Kubernetes cluster named cockroachdb. The --region flag specifies a regional three-zone cluster, and --num-nodes specifies one Kubernetes worker node in each zone.

    The --machine-type flag tells the node pool to use the n2-standard-4 machine type (4 vCPUs, 16 GB memory), which meets our recommended CPU and memory configuration.

    The process can take a few minutes, so do not move on to the next step until you see a Creating cluster cockroachdb...done message and details about your cluster.

  3. Get the email address associated with your Google Cloud account:

    icon/buttons/copy
    $ gcloud info | grep Account
    
    Account: [your.google.cloud.email@example.org]
    
    Warning:

    This command returns your email address in all lowercase. However, in the next step, you must enter the address using the accurate capitalization. For example, if your address is YourName@example.com, you must use YourName@example.com and not yourname@example.com.

  4. Create the RBAC roles CockroachDB needs for running on GKE, using the address from the previous step:

    icon/buttons/copy
    $ kubectl create clusterrolebinding $USER-cluster-admin-binding \
    --clusterrole=cluster-admin \
    --user={your.google.cloud.email@example.org}
    
    clusterrolebinding.rbac.authorization.k8s.io/your.username-cluster-admin-binding created
    

Hosted EKS

  1. Complete the steps described in the EKS Getting Started documentation.

    This includes installing and configuring the AWS CLI and eksctl, which is the command-line tool used to create and delete Kubernetes clusters on EKS, and kubectl, which is the command-line tool used to manage Kubernetes from your workstation.

    Note:

    If you are running EKS-Anywhere, CockroachDB requires that you configure your default storage class to auto-provision persistent volumes. Alternatively, you can define a custom storage configuration as required by your install pattern.

  2. From your local workstation, start the Kubernetes cluster:

    Tip:

    To ensure that all 3 nodes can be placed into a different availability zone, you may want to first confirm that at least 3 zones are available in the region for your account.

    icon/buttons/copy
    $ eksctl create cluster \
    --name cockroachdb \
    --nodegroup-name standard-workers \
    --node-type m5.xlarge \
    --nodes 3 \
    --nodes-min 1 \
    --nodes-max 4 \
    --node-ami auto
    

    This creates EKS instances and joins them into a single Kubernetes cluster named cockroachdb. The --node-type flag tells the node pool to use the m5.xlarge instance type (4 vCPUs, 16 GB memory), which meets our recommended CPU and memory configuration.

    Cluster provisioning usually takes between 10 and 15 minutes. Do not move on to the next step until you see a message like [✔] EKS cluster "cockroachdb" in "us-east-1" region is ready and details about your cluster.

  3. Open the AWS CloudFormation console to verify that the stacks eksctl-cockroachdb-cluster and eksctl-cockroachdb-nodegroup-standard-workers were successfully created. Be sure that your region is selected in the console.

Step 2. Start CockroachDB

Choose how you want to deploy and maintain the CockroachDB cluster.

Note:

The CockroachDB Kubernetes Operator eases CockroachDB cluster creation and management on a single Kubernetes cluster.

Note that the Operator does not provision or apply an Enterprise license key. To use Enterprise features with the Operator, set a license in the SQL shell.

Install the Operator

  1. Apply the custom resource definition (CRD) for the Operator:

    icon/buttons/copy
    $ kubectl apply -f https://raw.githubusercontent.com/cockroachdb/cockroach-operator/v2.4.0/install/crds.yaml
    
    customresourcedefinition.apiextensions.k8s.io/crdbclusters.crdb.cockroachlabs.com created
    
  2. By default, the Operator is configured to install in the cockroach-operator-system namespace and to manage CockroachDB instances for all namespaces on the cluster.

    If you'd like to change either of these defaults:

    1. Download the Operator manifest:

      icon/buttons/copy
      $ curl -0 https://raw.githubusercontent.com/cockroachdb/cockroach-operator/v2.4.0/install/operator.yaml
      
    2. To use a custom namespace, edit all instances of namespace: cockroach-operator-system with your desired namespace.

    3. To limit the namespaces that will be monitored, set the WATCH_NAMESPACE environment variable in the Deployment pod spec. This can be set to a single namespace, or a comma-delimited set of namespaces. When set, only those CrdbCluster resources in the supplied namespace(s) will be reconciled.

    4. Instead of using the command below, apply your local version of the Operator manifest to the cluster:

      icon/buttons/copy
      $ kubectl apply -f operator.yaml
      

    If you want to use the default namespace settings:

    icon/buttons/copy
    $ kubectl apply -f https://raw.githubusercontent.com/cockroachdb/cockroach-operator/v2.4.0/install/operator.yaml
    
    clusterrole.rbac.authorization.k8s.io/cockroach-database-role created
    serviceaccount/cockroach-database-sa created
    clusterrolebinding.rbac.authorization.k8s.io/cockroach-database-rolebinding created
    role.rbac.authorization.k8s.io/cockroach-operator-role created
    clusterrolebinding.rbac.authorization.k8s.io/cockroach-operator-rolebinding created
    clusterrole.rbac.authorization.k8s.io/cockroach-operator-role created
    serviceaccount/cockroach-operator-sa created
    rolebinding.rbac.authorization.k8s.io/cockroach-operator-default created
    deployment.apps/cockroach-operator created
    
  3. Set your current namespace to the one used by the Operator. For example, to use the Operator's default namespace:

    icon/buttons/copy
    $ kubectl config set-context --current --namespace=cockroach-operator-system
    
  4. Validate that the Operator is running:

    icon/buttons/copy
    $ kubectl get pods
    
    NAME                                  READY   STATUS    RESTARTS   AGE
    cockroach-operator-6f7b86ffc4-9ppkv   1/1     Running   0          54s
    

Initialize the cluster

  1. Download example.yaml, a custom resource that tells the Operator how to configure the Kubernetes cluster.

    icon/buttons/copy
    $ curl -O https://raw.githubusercontent.com/cockroachdb/cockroach-operator/v2.4.0/examples/example.yaml
    
    Note:

    By default, this custom resource specifies CPU and memory resources that are appropriate for the virtual machines used in this deployment example. On a production cluster, you should substitute values that are appropriate for your machines and workload. For details on configuring your deployment, see Configure the Cluster.

    Note:

    By default, the Operator will generate and sign 1 client and 1 node certificate to secure the cluster. This means that if you do not provide a CA, a cockroach-generated CA is used. To authenticate using your own CA, see Secure the Cluster.

  2. Apply example.yaml:

    icon/buttons/copy
    $ kubectl apply -f example.yaml
    

    The Operator will create a StatefulSet and initialize the nodes as a cluster.

    crdbcluster.crdb.cockroachlabs.com/cockroachdb created
    
  3. Check that the pods were created:

    icon/buttons/copy
    $ kubectl get pods
    
    NAME                                  READY   STATUS    RESTARTS   AGE
    cockroach-operator-6f7b86ffc4-9t9zb   1/1     Running   0          3m22s
    cockroachdb-0                         1/1     Running   0          2m31s
    cockroachdb-1                         1/1     Running   0          102s
    cockroachdb-2                         1/1     Running   0          46s
    

    Each pod should have READY status soon after being created.

    Note:

    Due to a known issue, in rare cases the Operator can crash while installing CockroachDB. This causes the CockroachDB pods to fail to start, while the version checker job continues to run. If this happens, run kubectl get jobs to find the names of any running cockroachdb-vcheck jobs, and delete these jobs with kubectl delete job {cockroachdb-vcheck-job}. Then reapply the custom resource (e.g., kubectl apply -f example.yaml).

Configure the cluster

  1. Download and modify our StatefulSet configuration:

    icon/buttons/copy
    $ curl -O https://raw.githubusercontent.com/cockroachdb/cockroach/master/cloud/kubernetes/bring-your-own-certs/cockroachdb-statefulset.yaml
    
  2. Update secretName with the name of the corresponding node secret.

    The secret names depend on your method for generating secrets. For example, if you follow the below steps using cockroach cert, use this secret name:

    icon/buttons/copy
    secret:
      secretName: cockroachdb.node
    
Note:

By default, this manifest specifies CPU and memory resources that are appropriate for the virtual machines used in this deployment example. On a production cluster, you should substitute values that are appropriate for your machines and workload. For details on configuring your deployment, see Configure the Cluster.

Create certificates

Tip:

The StatefulSet configuration sets all CockroachDB nodes to log to stderr, so if you ever need access to a pod/node's logs to troubleshoot, use kubectl logs <podname> rather than checking the log on the persistent volume.

Note:

The below steps use cockroach cert commands to quickly generate and sign the CockroachDB node and client certificates. Read our Authentication docs to learn about other methods of signing certificates.

  1. Create two directories:

    icon/buttons/copy
    $ mkdir certs my-safe-directory
    
    Directory Description
    certs You'll generate your CA certificate and all node and client certificates and keys in this directory.
    my-safe-directory You'll generate your CA key in this directory and then reference the key when generating node and client certificates.
  2. Create the CA certificate and key pair:

    icon/buttons/copy
    $ cockroach cert create-ca \
    --certs-dir=certs \
    --ca-key=my-safe-directory/ca.key
    
  3. Create a client certificate and key pair for the root user:

    icon/buttons/copy
    $ cockroach cert create-client \
    root \
    --certs-dir=certs \
    --ca-key=my-safe-directory/ca.key
    
  4. Upload the client certificate and key to the Kubernetes cluster as a secret:

    icon/buttons/copy
    $ kubectl create secret \
    generic cockroachdb.client.root \
    --from-file=certs
    
    secret/cockroachdb.client.root created
    
  5. Create the certificate and key pair for your CockroachDB nodes:

    icon/buttons/copy
    $ cockroach cert create-node \
    localhost 127.0.0.1 \
    cockroachdb-public \
    cockroachdb-public.default \
    cockroachdb-public.default.svc.cluster.local \
    *.cockroachdb \
    *.cockroachdb.default \
    *.cockroachdb.default.svc.cluster.local \
    --certs-dir=certs \
    --ca-key=my-safe-directory/ca.key
    
  6. Upload the node certificate and key to the Kubernetes cluster as a secret:

    icon/buttons/copy
    $ kubectl create secret \
    generic cockroachdb.node \
    --from-file=certs
    
    secret/cockroachdb.node created
    
  7. Check that the secrets were created on the cluster:

    icon/buttons/copy
    $ kubectl get secrets
    
    NAME                      TYPE                                  DATA   AGE
    cockroachdb.client.root   Opaque                                3      41m
    cockroachdb.node          Opaque                                5      14s
    default-token-6qjdb       kubernetes.io/service-account-token   3      4m
    

Initialize the cluster

  1. Use the config file you downloaded to create the StatefulSet that automatically creates 3 pods, each running a CockroachDB node:

    icon/buttons/copy
    $ kubectl create -f cockroachdb-statefulset.yaml
    
    serviceaccount/cockroachdb created
    role.rbac.authorization.k8s.io/cockroachdb created
    rolebinding.rbac.authorization.k8s.io/cockroachdb created
    service/cockroachdb-public created
    service/cockroachdb created
    poddisruptionbudget.policy/cockroachdb-budget created
    statefulset.apps/cockroachdb created
    
  2. Initialize the CockroachDB cluster:

    1. Confirm that three pods are Running successfully. Note that they will not be considered Ready until after the cluster has been initialized:

      icon/buttons/copy
      $ kubectl get pods
      
      NAME            READY     STATUS    RESTARTS   AGE
      cockroachdb-0   0/1       Running   0          2m
      cockroachdb-1   0/1       Running   0          2m
      cockroachdb-2   0/1       Running   0          2m
      
    2. Confirm that the persistent volumes and corresponding claims were created successfully for all three pods:

      icon/buttons/copy
      $ kubectl get pv
      
      NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                           STORAGECLASS   REASON   AGE
      pvc-9e435563-fb2e-11e9-a65c-42010a8e0fca   100Gi      RWO            Delete           Bound    default/datadir-cockroachdb-0   standard                51m
      pvc-9e47d820-fb2e-11e9-a65c-42010a8e0fca   100Gi      RWO            Delete           Bound    default/datadir-cockroachdb-1   standard                51m
      pvc-9e4f57f0-fb2e-11e9-a65c-42010a8e0fca   100Gi      RWO            Delete           Bound    default/datadir-cockroachdb-2   standard                51m
      
    3. Run cockroach init on one of the pods to complete the node startup process and have them join together as a cluster:

      icon/buttons/copy
      $ kubectl exec -it cockroachdb-0 \
      -- /cockroach/cockroach init \
      --certs-dir=/cockroach/cockroach-certs
      
      Cluster successfully initialized
      
    4. Confirm that cluster initialization has completed successfully. The job should be considered successful and the Kubernetes pods should soon be considered Ready:

      icon/buttons/copy
      $ kubectl get pods
      
      NAME            READY     STATUS    RESTARTS   AGE
      cockroachdb-0   1/1       Running   0          3m
      cockroachdb-1   1/1       Running   0          3m
      cockroachdb-2   1/1       Running   0          3m
      
Warning:

The CockroachDB Helm chart is compatible with Kubernetes versions 1.22 and earlier (the latest version as of this writing). However, no new feature development is currently planned. If you are experiencing issues with a Helm deployment on production, contact our Support team.

If you are already running a secure Helm deployment on Kubernetes 1.22 and later, you must migrate away from using the Kubernetes CA for cluster authentication. For details, see Certificate management.

Note:

Secure CockroachDB deployments on Amazon EKS via Helm are not yet supported.

  1. Install the Helm client (version 3.0 or higher) and add the cockroachdb chart repository:

    icon/buttons/copy
    $ helm repo add cockroachdb https://charts.cockroachdb.com/
    
    "cockroachdb" has been added to your repositories
    
  2. Update your Helm chart repositories to ensure that you're using the latest CockroachDB chart:

    icon/buttons/copy
    $ helm repo update
    
  3. The cluster configuration is set in the Helm chart's values file.

    Note:

    By default, the Helm chart specifies CPU and memory resources that are appropriate for the virtual machines used in this deployment example. On a production cluster, you should substitute values that are appropriate for your machines and workload. For details on configuring your deployment, see Configure the Cluster.

    Before deploying, modify some parameters in our Helm chart's values file:

    1. Create a local YAML file (e.g., my-values.yaml) to specify your custom values. These will be used to override the defaults in values.yaml.
    2. To avoid running out of memory when CockroachDB is not the only pod on a Kubernetes node, you must set memory limits explicitly. This is because CockroachDB does not detect the amount of memory allocated to its pod when run in Kubernetes. We recommend setting conf.cache and conf.max-sql-memory each to 1/4 of the memory allocation specified in statefulset.resources.requests and statefulset.resources.limits.

      Tip:

      For example, if you are allocating 8Gi of memory to each CockroachDB node, allocate 2Gi to cache and 2Gi to max-sql-memory.

      icon/buttons/copy
      conf:
        cache: "2Gi"
        max-sql-memory: "2Gi"
      
    3. For a secure deployment, set tls.enabled to true.

      icon/buttons/copy
      tls:
        enabled: true
      
      Note:

      By default, the Helm chart will generate and sign 1 client and 1 node certificate to secure the cluster. To authenticate using your own CA, see Secure the Cluster.

  4. Install the CockroachDB Helm chart, specifying your custom values file.

    Provide a "release" name to identify and track this particular deployment of the chart, and override the default values with those in my-values.yaml.

    Note:

    This tutorial uses my-release as the release name. If you use a different value, be sure to adjust the release name in subsequent commands.

    icon/buttons/copy
    $ helm install my-release --values {custom-values}.yaml cockroachdb/cockroachdb
    

    Behind the scenes, this command uses our cockroachdb-statefulset.yaml file to create the StatefulSet that automatically creates 3 pods, each with a CockroachDB node running inside it, where each pod has distinguishable network identity and always binds back to the same persistent storage on restart.

  5. Confirm that CockroachDB cluster initialization has completed successfully, with the pods for CockroachDB showing 1/1 under READY and the pod for initialization showing COMPLETED under STATUS:

    icon/buttons/copy
    $ kubectl get pods
    
    NAME                                READY     STATUS      RESTARTS   AGE
    my-release-cockroachdb-0            1/1       Running     0          8m
    my-release-cockroachdb-1            1/1       Running     0          8m
    my-release-cockroachdb-2            1/1       Running     0          8m
    my-release-cockroachdb-init-hxzsc   0/1       Completed   0          1h
    
  6. Confirm that the persistent volumes and corresponding claims were created successfully for all three pods:

    icon/buttons/copy
    $ kubectl get pv
    
    NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS    CLAIM                                      STORAGECLASS   REASON    AGE
    pvc-71019b3a-fc67-11e8-a606-080027ba45e5   100Gi      RWO            Delete           Bound     default/datadir-my-release-cockroachdb-0   standard                 11m
    pvc-7108e172-fc67-11e8-a606-080027ba45e5   100Gi      RWO            Delete           Bound     default/datadir-my-release-cockroachdb-1   standard                 11m
    pvc-710dcb66-fc67-11e8-a606-080027ba45e5   100Gi      RWO            Delete           Bound     default/datadir-my-release-cockroachdb-2   standard                 11m    
    
Tip:

The StatefulSet configuration sets all CockroachDB nodes to log to stderr, so if you ever need access to a pod/node's logs to troubleshoot, use kubectl logs <podname> rather than checking the log on the persistent volume.

Step 3. Use the built-in SQL client

To use the CockroachDB SQL client, first launch a secure pod running the cockroach binary.

icon/buttons/copy
$ kubectl create \
-f https://raw.githubusercontent.com/cockroachdb/cockroach-operator/master/examples/client-secure-operator.yaml
  1. Get a shell into the pod and start the CockroachDB built-in SQL client:

    icon/buttons/copy
    $ kubectl exec -it cockroachdb-client-secure \
    -- ./cockroach sql \
    --certs-dir=/cockroach/cockroach-certs \
    --host=cockroachdb-public
    
    # Welcome to the CockroachDB SQL shell.
    # All statements must be terminated by a semicolon.
    # To exit, type: \q.
    #
    # Server version: CockroachDB CCL v21.1.0 (x86_64-unknown-linux-gnu, built 2021/04/23 13:54:57, go1.13.14) (same version as client)
    # Cluster ID: a96791d9-998c-4683-a3d3-edbf425bbf11
    #
    # Enter \? for a brief introduction.
    #
    root@cockroachdb-public:26257/defaultdb>
    
  2. Run some basic CockroachDB SQL statements:

    icon/buttons/copy
    > CREATE DATABASE bank;
    
    icon/buttons/copy
    > CREATE TABLE bank.accounts (id INT PRIMARY KEY, balance DECIMAL);
    
    icon/buttons/copy
    > INSERT INTO bank.accounts VALUES (1, 1000.50);
    
    icon/buttons/copy
    > SELECT * FROM bank.accounts;
    
      id | balance
    +----+---------+
       1 | 1000.50
    (1 row)
    
  3. Create a user with a password:

    icon/buttons/copy
    > CREATE USER roach WITH PASSWORD 'Q7gc8rEdS';
    

    You will need this username and password to access the DB Console later.

  4. Exit the SQL shell and pod:

    icon/buttons/copy
    > \q
    
icon/buttons/copy
$ kubectl create \
-f https://raw.githubusercontent.com/cockroachdb/cockroach/master/cloud/kubernetes/bring-your-own-certs/client.yaml
pod/cockroachdb-client-secure created
  1. Get a shell into the pod and start the CockroachDB built-in SQL client:

    icon/buttons/copy
    $ kubectl exec -it cockroachdb-client-secure \
    -- ./cockroach sql \
    --certs-dir=/cockroach-certs \
    --host=cockroachdb-public
    
    # Welcome to the cockroach SQL interface.
    # All statements must be terminated by a semicolon.
    # To exit: CTRL + D.
    #
    # Client version: CockroachDB CCL v19.1.0 (x86_64-unknown-linux-gnu, built 2019/04/29 18:36:40, go1.11.6)
    # Server version: CockroachDB CCL v19.1.0 (x86_64-unknown-linux-gnu, built 2019/04/29 18:36:40, go1.11.6)
    
    # Cluster ID: 256a8705-e348-4e3a-ab12-e1aba96857e4
    #
    # Enter \? for a brief introduction.
    #
    root@cockroachdb-public:26257/defaultdb>
    
    Tip:

    This pod will continue running indefinitely, so any time you need to reopen the built-in SQL client or run any other cockroach client commands (e.g., cockroach node), repeat step 2 using the appropriate cockroach command.

    If you'd prefer to delete the pod and recreate it when needed, run kubectl delete pod cockroachdb-client-secure.

  2. Run some basic CockroachDB SQL statements:

    icon/buttons/copy
    > CREATE DATABASE bank;
    
    icon/buttons/copy
    > CREATE TABLE bank.accounts (id INT PRIMARY KEY, balance DECIMAL);
    
    icon/buttons/copy
    > INSERT INTO bank.accounts VALUES (1, 1000.50);
    
    icon/buttons/copy
    > SELECT * FROM bank.accounts;
    
      id | balance
    +----+---------+
       1 | 1000.50
    (1 row)
    
  3. Create a user with a password:

    icon/buttons/copy
    > CREATE USER roach WITH PASSWORD 'Q7gc8rEdS';
    

    You will need this username and password to access the DB Console later.

  4. Exit the SQL shell and pod:

    icon/buttons/copy
    > \q
    
  1. From your local workstation, use our client-secure.yaml file to launch a pod and keep it running indefinitely.

    1. Download the file:

      icon/buttons/copy
      $ curl -OOOOOOOOO \
      https://raw.githubusercontent.com/cockroachdb/cockroach/master/cloud/kubernetes/client-secure.yaml
      
    2. In the file, change serviceAccountName: cockroachdb to serviceAccountName: my-release-cockroachdb.

    3. Use the file to launch a pod and keep it running indefinitely:

      icon/buttons/copy
      $ kubectl create -f client-secure.yaml
      
      pod "cockroachdb-client-secure" created
      
  2. Get a shell into the pod and start the CockroachDB built-in SQL client:

    icon/buttons/copy
    $ kubectl exec -it cockroachdb-client-secure \
    -- ./cockroach sql \
    --certs-dir=/cockroach-certs \
    --host=my-release-cockroachdb-public
    
    # Welcome to the cockroach SQL interface.
    # All statements must be terminated by a semicolon.
    # To exit: CTRL + D.
    #
    # Client version: CockroachDB CCL v19.1.0 (x86_64-unknown-linux-gnu, built 2019/04/29 18:36:40, go1.11.6)
    # Server version: CockroachDB CCL v19.1.0 (x86_64-unknown-linux-gnu, built 2019/04/29 18:36:40, go1.11.6)
    
    # Cluster ID: 256a8705-e348-4e3a-ab12-e1aba96857e4
    #
    # Enter \? for a brief introduction.
    #
    root@my-release-cockroachdb-public:26257/defaultdb>
    
    Tip:

    This pod will continue running indefinitely, so any time you need to reopen the built-in SQL client or run any other cockroach client commands (e.g., cockroach node), repeat step 2 using the appropriate cockroach command.

    If you'd prefer to delete the pod and recreate it when needed, run kubectl delete pod cockroachdb-client-secure.

  3. Run some basic CockroachDB SQL statements:

    icon/buttons/copy
    > CREATE DATABASE bank;
    
    icon/buttons/copy
    > CREATE TABLE bank.accounts (id INT PRIMARY KEY, balance DECIMAL);
    
    icon/buttons/copy
    > INSERT INTO bank.accounts VALUES (1, 1000.50);
    
    icon/buttons/copy
    > SELECT * FROM bank.accounts;
    
      id | balance
    +----+---------+
       1 | 1000.50
    (1 row)
    
  4. Create a user with a password:

    icon/buttons/copy
    > CREATE USER roach WITH PASSWORD 'Q7gc8rEdS';
    

    You will need this username and password to access the DB Console later.

  5. Exit the SQL shell and pod:

    icon/buttons/copy
    > \q
    

Step 4. Access the DB Console

To access the cluster's DB Console:

  1. On secure clusters, certain pages of the DB Console can only be accessed by admin users.

    Get a shell into the pod and start the CockroachDB built-in SQL client:

    icon/buttons/copy
    $ kubectl exec -it cockroachdb-client-secure \
    -- ./cockroach sql \
    --certs-dir=/cockroach/cockroach-certs \
    --host=cockroachdb-public
    
    icon/buttons/copy
    $ kubectl exec -it cockroachdb-client-secure \
    -- ./cockroach sql \
    --certs-dir=/cockroach-certs \
    --host=cockroachdb-public
    

    $ kubectl exec -it cockroachdb-client-secure \ -- ./cockroach sql \ --certs-dir=/cockroach-certs \ --host=my-release-cockroachdb-public

  2. Assign roach to the admin role (you only need to do this once):

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    > GRANT admin TO roach;
    
  3. Exit the SQL shell and pod:

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    > \q
    
  4. In a new terminal window, port-forward from your local machine to the cockroachdb-public service:

    icon/buttons/copy
    $ kubectl port-forward service/cockroachdb-public 8080
    
    icon/buttons/copy
    $ kubectl port-forward service/cockroachdb-public 8080
    
    icon/buttons/copy
    $ kubectl port-forward service/my-release-cockroachdb-public 8080
    
    Forwarding from 127.0.0.1:8080 -> 8080
    
    Note:
    The port-forward command must be run on the same machine as the web browser in which you want to view the DB Console. If you have been running these commands from a cloud instance or other non-local shell, you will not be able to view the UI without configuring kubectl locally and running the above port-forward command on your local machine.
  5. Go to https://localhost:8080 and log in with the username and password you created earlier.

    Note:

    If you are using Google Chrome, and you are getting an error about not being able to reach localhost because its certificate has been revoked, go to chrome://flags/#allow-insecure-localhost, enable "Allow invalid certificates for resources loaded from localhost", and then restart the browser. Enabling this Chrome feature degrades security for all sites running on localhost, not just CockroachDB's DB Console, so be sure to enable the feature only temporarily.

  6. In the UI, verify that the cluster is running as expected:

    • View the Node List to ensure that all nodes successfully joined the cluster.
    • Click the Databases tab on the left to verify that bank is listed.

Step 5. Stop the cluster

Note:

If you want to continue using this cluster, see the documentation on configuring, scaling, monitoring, and upgrading the cluster.

To shut down the CockroachDB cluster:

  1. Delete the previously created custom resource:

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    $ kubectl delete -f example.yaml
    
  2. Remove the Operator:

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    $ kubectl delete -f https://raw.githubusercontent.com/cockroachdb/cockroach-operator/v2.4.0/install/operator.yaml
    

    This will delete the CockroachDB cluster being run by the Operator. It will not delete the persistent volumes that were attached to the pods.

    Warning:

    If you want to delete the persistent volumes and free up the storage used by CockroachDB, be sure you have a backup copy of your data. Data cannot be recovered once the persistent volumes are deleted. For more information, see the Kubernetes documentation.

Note:

This does not delete any secrets you may have created. For more information on managing secrets, see the Kubernetes documentation.

  1. Delete the resources associated with the cockroachdb label, including the logs and Prometheus and Alertmanager resources:

    Warning:

    This does not include deleting the persistent volumes that were attached to the pods. If you want to delete the persistent volumes and free up the storage used by CockroachDB, be sure you have a backup copy of your data. Data cannot be recovered once the persistent volumes are deleted. For more information, see the Kubernetes documentation.

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    $ kubectl delete pods,statefulsets,services,poddisruptionbudget,jobs,rolebinding,clusterrolebinding,role,clusterrole,serviceaccount,alertmanager,prometheus,prometheusrule,serviceMonitor -l app=cockroachdb
    
    pod "cockroachdb-0" deleted
    pod "cockroachdb-1" deleted
    pod "cockroachdb-2" deleted
    statefulset.apps "alertmanager-cockroachdb" deleted
    statefulset.apps "prometheus-cockroachdb" deleted
    service "alertmanager-cockroachdb" deleted
    service "cockroachdb" deleted
    service "cockroachdb-public" deleted
    poddisruptionbudget.policy "cockroachdb-budget" deleted
    job.batch "cluster-init-secure" deleted
    rolebinding.rbac.authorization.k8s.io "cockroachdb" deleted
    clusterrolebinding.rbac.authorization.k8s.io "cockroachdb" deleted
    clusterrolebinding.rbac.authorization.k8s.io "prometheus" deleted
    role.rbac.authorization.k8s.io "cockroachdb" deleted
    clusterrole.rbac.authorization.k8s.io "cockroachdb" deleted
    clusterrole.rbac.authorization.k8s.io "prometheus" deleted
    serviceaccount "cockroachdb" deleted
    serviceaccount "prometheus" deleted
    alertmanager.monitoring.coreos.com "cockroachdb" deleted
    prometheus.monitoring.coreos.com "cockroachdb" deleted
    prometheusrule.monitoring.coreos.com "prometheus-cockroachdb-rules" deleted
    servicemonitor.monitoring.coreos.com "cockroachdb" deleted
    
  2. Delete the pod created for cockroach client commands, if you didn't do so earlier:

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    $ kubectl delete pod cockroachdb-client-secure
    
    pod "cockroachdb-client-secure" deleted
    
Note:

This does not delete any secrets you may have created. For more information on managing secrets, see the Kubernetes documentation.

  1. Uninstall the release:

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    $ helm uninstall my-release
    
    release "my-release" deleted
    
  2. Delete the pod created for cockroach client commands, if you didn't do so earlier:

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    $ kubectl delete pod cockroachdb-client-secure
    
    pod "cockroachdb-client-secure" deleted
    
  3. Get the names of any CSRs for the cluster:

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    $ kubectl get csr
    
    NAME                                                   AGE       REQUESTOR                               CONDITION
    default.client.root                                    1h        system:serviceaccount:default:default   Approved,Issued
    default.node.my-release-cockroachdb-0                  1h        system:serviceaccount:default:default   Approved,Issued
    default.node.my-release-cockroachdb-1                  1h        system:serviceaccount:default:default   Approved,Issued
    default.node.my-release-cockroachdb-2                  1h        system:serviceaccount:default:default   Approved,Issued
    default.node.my-release-cockroachdb-3                  12m       system:serviceaccount:default:default   Approved,Issued
    node-csr-0Xmb4UTVAWMEnUeGbW4KX1oL4XV_LADpkwjrPtQjlZ4   1h        kubelet                                 Approved,Issued
    node-csr-NiN8oDsLhxn0uwLTWa0RWpMUgJYnwcFxB984mwjjYsY   1h        kubelet                                 Approved,Issued
    node-csr-aU78SxyU69pDK57aj6txnevr7X-8M3XgX9mTK0Hso6o   1h        kubelet                                 Approved,Issued
    ...
    
  4. Delete any CSRs that you created:

    icon/buttons/copy
    $ kubectl delete csr default.client.root default.node.my-release-cockroachdb-0 default.node.my-release-cockroachdb-1 default.node.my-release-cockroachdb-2 default.node.my-release-cockroachdb-3
    
    certificatesigningrequest "default.client.root" deleted
    certificatesigningrequest "default.node.my-release-cockroachdb-0" deleted
    certificatesigningrequest "default.node.my-release-cockroachdb-1" deleted
    certificatesigningrequest "default.node.my-release-cockroachdb-2" deleted
    certificatesigningrequest "default.node.my-release-cockroachdb-3" deleted
    
    Note:

    This does not delete any secrets you may have created. For more information on managing secrets, see the Kubernetes documentation.

Stop Kubernetes

To delete the Kubernetes cluster:

  • Hosted GKE:

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    $ gcloud container clusters delete cockroachdb --region {region-name}
    
  • Hosted EKS:

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    $ eksctl delete cluster --name cockroachdb
    
  • Manual GCE:

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    $ cluster/kube-down.sh
    
  • Manual AWS:

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    $ cluster/kube-down.sh
    
Warning:

If you stop Kubernetes without first deleting the persistent volumes, they will still exist in your cloud project.

See also

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