github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/docs/user_docs/kubeblocks-for-postgresql/cluster-management/start-stop-a-cluster.md (about)

     1  ---
     2  title: Stop/Start a PostgreSQL cluster
     3  description: How to start/stop a PostgreSQL cluster
     4  keywords: [postgresql, stop a cluster, start a cluster]
     5  sidebar_position: 5
     6  sidebar_label: Stop/Start
     7  ---
     8  
     9  # Stop/Start PostgreSQL Cluster
    10  
    11  You can stop/start a cluster to save computing resources. When a cluster is stopped, the computing resources of this cluster are released, which means the pods of Kubernetes are released, but the storage resources are reserved. Start this cluster again if you want to restore the cluster resources from the original storage by snapshots.
    12  
    13  ## Stop a cluster
    14  
    15  ### Option 1. (Recommended) Use kbcli
    16  
    17  Configure the name of your cluster and run the command below to stop this cluster.
    18  
    19  ```bash
    20  kbcli cluster stop <name>
    21  ```
    22  
    23  ***Example***
    24  
    25  ```bash
    26  kbcli cluster stop pg-cluster
    27  ```
    28  
    29  ### Option 2. Create an OpsRequest
    30  
    31  Run the command below to stop a cluster.
    32  
    33  ```bash
    34  kubectl apply -f - <<EOF
    35  apiVersion: apps.kubeblocks.io/v1alpha1
    36  kind: OpsRequest
    37  metadata:
    38    name: pg-cluster
    39    generateName: stop-
    40  spec:
    41    # cluster ref
    42    clusterRef: pg-cluster
    43    type: Stop
    44  EOF
    45  ```
    46  
    47  ### Option 3. Change the YAML file of the cluster
    48  
    49  Configure replicas as 0 to delete pods.
    50  
    51  ```yaml
    52  apiVersion: apps.kubeblocks.io/v1alpha1
    53  kind: Cluster
    54  metadata:
    55      name: pg-cluster
    56  spec:
    57    clusterDefinitionRef: postgresql
    58    clusterVersionRef: postgresql-14.7.0
    59    terminationPolicy: WipeOut
    60    componentSpecs:
    61    - name: pg-replication
    62      componentDefRef: postgresql
    63      monitor: false  
    64      replicas: 0
    65      volumeClaimTemplates:
    66      - name: data
    67        spec:
    68          storageClassName: standard
    69          accessModes:
    70            - ReadWriteOnce
    71          resources:
    72            requests:
    73              storage: 1Gi
    74  ```
    75  
    76  ## Start a cluster
    77    
    78  ### Option 1. (Recommended) Use kbcli
    79  
    80  Configure the name of your cluster and run the command below to start this cluster.
    81  
    82  ```bash
    83  kbcli cluster start <name>
    84  ```
    85  
    86  ***Example***
    87  
    88  ```bash
    89  kbcli cluster start pg-cluster
    90  ```
    91  
    92  ### Option 2. Create an OpsRequest
    93  
    94  Run the command below to start a cluster.
    95  
    96  ```bash
    97  kubectl apply -f - <<EOF
    98  apiVersion: apps.kubeblocks.io/v1alpha1
    99  kind: OpsRequest
   100  metadata:
   101    name: pg-cluster
   102    generateName: start-
   103  spec:
   104    # cluster ref
   105    clusterRef: pg-cluster
   106    type: Start
   107  EOF 
   108  ```
   109  
   110  ### Option 3. Change the YAML file of the cluster
   111  
   112  Change replicas back to the original amount to start this cluster again.
   113  
   114  ```yaml
   115  apiVersion: apps.kubeblocks.io/v1alpha1
   116  kind: Cluster
   117  metadata:
   118      name: pg-cluster
   119  spec:
   120    clusterDefinitionRef: postgresql
   121    clusterVersionRef: postgresql-14.7.0
   122    terminationPolicy: WipeOut
   123    componentSpecs:
   124    - name: pg-replication
   125      componentDefRef: postgresql
   126      monitor: false  
   127      replicas: 1
   128      volumeClaimTemplates:
   129      - name: data
   130        spec:
   131          storageClassName: standard
   132          accessModes:
   133            - ReadWriteOnce
   134          resources:
   135            requests:
   136              storage: 1Gi
   137  ```