{
  "kind": "Template",
  "apiVersion": "v1",
  "metadata": {
    "name": "pg-replica-example",
    "annotations": {
      "description": "PostgreSQL Replication Example",
      "iconClass": "icon-database",
      "tags": "database,postgresql,replication"
    }
  },
  "parameters": [
    {
      "name": "POSTGRESQL_MASTER_USER",
      "description": "The username used for master-slave replication",
      "value": "master",
      "required": true
    },
    {
      "name": "POSTGRESQL_MASTER_PASSWORD",
      "description": "The password for the PostgreSQL replication user",
      "generate": "expression",
      "from": "[a-zA-Z0-9]{12}",
      "required": true
    },
    {
      "name": "POSTGRESQL_USER",
      "description": "The username that clients will use to connect to PostgreSQL server",
      "value": "user",
      "required": true
    },
    {
      "name": "POSTGRESQL_PASSWORD",
      "description": "The password for the PostgreSQL master user",
      "generate": "expression",
      "from": "[a-zA-Z0-9]{12}",
      "required": true
    },
    {
      "name": "POSTGRESQL_DATABASE",
      "description": "The name of the database that will be created",
      "value": "userdb",
      "required": true
    },
    {
      "name": "POSTGRESQL_ADMIN_PASSWORD",
      "description": "The password for the PostgreSQL administrator",
      "generate": "expression",
      "from": "[a-zA-Z0-9]{12}",
      "required": false
    },
    {
      "name": "POSTGRESQL_MASTER_SERVICE_NAME",
      "description": "The name of the PostgreSQL Service (used to DNS lookup, default: 'postgresql-master')",
      "value": "postgresql-master",
      "required": true
    },
    {
      "name": "POSTGRESQL_SLAVE_SERVICE_NAME",
      "description": "The name of the PostgreSQL Service (used to DNS lookup, default: 'postgresql-slave')",
      "value": "postgresql-slave",
      "required": true
    },
    {
      "name": "VOLUME_CAPACITY",
      "description": "Volume space available for data, e.g. 512Mi, 2Gi",
      "value": "512Mi",
      "required": true
    }
  ],
  "objects": [
    {
      "kind": "PersistentVolumeClaim",
      "apiVersion": "v1",
      "metadata": {
        "name": "postgresql-data-claim"
      },
      "spec": {
        "accessModes": [
          "ReadWriteOnce"
        ],
        "resources": {
          "requests": {
            "storage": "${VOLUME_CAPACITY}"
          }
        }
      }
    },
    {
      "kind": "Service",
      "apiVersion": "v1",
      "metadata": {
        "name": "${POSTGRESQL_MASTER_SERVICE_NAME}",
        "labels": {
          "name": "${POSTGRESQL_MASTER_SERVICE_NAME}"
        }
      },
      "spec": {
        "ports": [
          {
            "port": 5432,
            "targetPort": 5432
          }
        ],
        "selector": {
          "name": "${POSTGRESQL_MASTER_SERVICE_NAME}"
        },
        "clusterIP": "None"
      }
    },
    {
      "kind": "Service",
      "apiVersion": "v1",
      "metadata": {
        "name": "${POSTGRESQL_SLAVE_SERVICE_NAME}",
        "labels": {
          "name": "${POSTGRESQL_SLAVE_SERVICE_NAME}"
        }
      },
      "spec": {
        "ports": [
          {
            "port": 5432,
            "targetPort": 5432
          }
        ],
        "selector": {
          "name": "${POSTGRESQL_SLAVE_SERVICE_NAME}"
        },
        "clusterIP": "None"
      }
    },
    {
      "kind": "DeploymentConfig",
      "apiVersion": "v1",
      "metadata": {
        "name": "${POSTGRESQL_MASTER_SERVICE_NAME}"
      },
      "spec": {
        "strategy": {
          "type": "Recreate"
        },
        "triggers": [
          {
            "type": "ConfigChange"
          }
        ],
        "replicas": 1,
        "selector": {
          "name": "${POSTGRESQL_MASTER_SERVICE_NAME}"
        },
        "template": {
          "metadata": {
            "labels": {
              "name": "${POSTGRESQL_MASTER_SERVICE_NAME}"
            }
          },
          "spec": {
            "volumes": [
              {
                "name": "postgresql-data",
                "persistentVolumeClaim": {
                  "claimName": "postgresql-data-claim"
                }
              }
            ],
            "containers": [
              {
                "name": "postgresql-master",
                "image": "registry.access.redhat.com/rhscl/postgresql-94-rhel7",
                "args": [
                  "run-postgresql-master"
                ],
                "ports": [
                  {
                    "containerPort": 5432
                  }
                ],
                "env": [
                  {
                    "name": "POSTGRESQL_MASTER_USER",
                    "value": "${POSTGRESQL_MASTER_USER}"
                  },
                  {
                    "name": "POSTGRESQL_MASTER_PASSWORD",
                    "value": "${POSTGRESQL_MASTER_PASSWORD}"
                  },
                  {
                    "name": "POSTGRESQL_USER",
                    "value": "${POSTGRESQL_USER}"
                  },
                  {
                    "name": "POSTGRESQL_PASSWORD",
                    "value": "${POSTGRESQL_PASSWORD}"
                  },
                  {
                    "name": "POSTGRESQL_DATABASE",
                    "value": "${POSTGRESQL_DATABASE}"
                  },
                  {
                    "name": "POSTGRESQL_ADMIN_PASSWORD",
                    "value": "${POSTGRESQL_ADMIN_PASSWORD}"
                  }
                ],
                "volumeMounts": [
                  {
                    "name": "postgresql-data",
                    "mountPath": "/var/lib/pgsql/data"
                  }
                ]
              }
            ]
          }
        }
      }
    },
    {
      "kind": "DeploymentConfig",
      "apiVersion": "v1",
      "metadata": {
        "name": "${POSTGRESQL_SLAVE_SERVICE_NAME}"
      },
      "spec": {
        "strategy": {
          "type": "Recreate"
        },
        "triggers": [
          {
            "type": "ConfigChange"
          }
        ],
        "replicas": 1,
        "selector": {
          "name": "${POSTGRESQL_SLAVE_SERVICE_NAME}"
        },
        "template": {
          "metadata": {
            "labels": {
              "name": "${POSTGRESQL_SLAVE_SERVICE_NAME}"
            }
          },
          "spec": {
            "volumes": [
              {
                "name": "postgresql-data",
                "emptyDir": {}
              }
            ],
            "containers": [
              {
                "name": "postgresql-slave",
                "image": "registry.access.redhat.com/rhscl/postgresql-94-rhel7",
                "args": [
                  "run-postgresql-slave"
                ],
                "ports": [
                  {
                    "containerPort": 5432
                  }
                ],
                "env": [
                  {
                    "name": "POSTGRESQL_MASTER_SERVICE_NAME",
                    "value": "${POSTGRESQL_MASTER_SERVICE_NAME}"
                  },
                  {
                    "name": "POSTGRESQL_MASTER_USER",
                    "value": "${POSTGRESQL_MASTER_USER}"
                  },
                  {
                    "name": "POSTGRESQL_MASTER_PASSWORD",
                    "value": "${POSTGRESQL_MASTER_PASSWORD}"
                  },
                  {
                    "name": "POSTGRESQL_USER",
                    "value": "${POSTGRESQL_USER}"
                  },
                  {
                    "name": "POSTGRESQL_PASSWORD",
                    "value": "${POSTGRESQL_PASSWORD}"
                  },
                  {
                    "name": "POSTGRESQL_DATABASE",
                    "value": "${POSTGRESQL_DATABASE}"
                  }
                ],
                "volumeMounts": [
                  {
                    "name": "postgresql-data",
                    "mountPath": "/var/lib/pgsql/data"
                  }
                ]
              }
            ]
          }
        }
      }
    }
  ]
}