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Create El Carro Database(s)

This step depends on the previous step of successfully created Instance CR. The preflight checks ensure that the Database Controller doesn't reconcile until the Instance is found in the Ready state and the database instance accepts connections.

Confirm that the Instance CR has been created successfully and features ReadyStatus and DBReadyStatus of "True":

export NS=<namespace of user choice, for example: "db">
kubectl get instances.oracle.db.anthosapis.com -n $NS

NAME     DB ENGINE   VERSION   EDITION      ENDPOINT        URL                  READYSTATUS   DBREADYSTATUS   DB NAMES   BACKUP ID
mydb     Oracle      12.2      Enterprise   mydb-svc.db     34.122.76.205:6021   True          True

  1. Prepare a Database CR Manifest

    Please note that the user / schema credentials in the manifest below appear in clear text and may need to be secured.

    cat ${PATH_TO_EL_CARRO_RELEASE}/samples/v1alpha1_database_pdb1.yaml
apiVersion: oracle.db.anthosapis.com/v1alpha1
kind: Database
metadata:
 name: pdb1
spec:
 name: pdb1
 instance: mydb
 admin_password: google
 users:
   - name: superuser
     password: superpassword
     privileges:
       - dba
   - name: scott
     password: tiger
     privileges:
       - connect
       - resource
       - unlimited tablespace
   - name: proberuser
     password: proberpassword
     privileges:
       - create session

  2. Submit the Database CR

    After completing the Database manifest, submit it to the local cluster as follows:

    kubectl apply -f ${PATH_TO_EL_CARRO_RELEASE}/samples/v1alpha1_database_pdb1.yaml -n $NS

  3. Review the Database CR

    An easy way to monitor the state of the Database CR is by running the following command:

    kubectl get databases.oracle.db.anthosapis.com -n $NS -w
NAMESPACE   NAME   INSTANCE        USERS       STATUS
db          pdb1   mydb            scott       Ready

    Once the Database CR status turns to Ready, the PDB database is ready to use. In addition to having a separate entry for each PDB in the Database CR, a list of PDBs is also propagated up to an Instance CR and looks like the following:

    kubectl get instances.oracle.db.anthosapis.com -n $NS
NAME     DB ENGINE   VERSION   EDITION      ENDPOINT        URL                  READYSTATUS   DBREADYSTATUS   DB NAMES    BACKUP ID
mydb     Oracle      12.2      Enterprise   mydb-svc.db     34.122.76.205:6021   True          True            [pdb1]

    The above steps can be repeated to create additional Databases (in particular, the samples supplied with El Carro release includes v1alpha1_database_pdb2.yaml).

  4. Connect to a Database

    At this point a Database (PDB) should be fully functional and accessible from outside the cluster via an external load balancer on a public IP address and port 6021 (to be made configurable in future releases). The IP and the port are combined together in the Instance.Status.URL attribute:

    kubectl get instances.oracle.db.anthosapis.com -n $NS
NAME     DB ENGINE   VERSION   EDITION      ENDPOINT        URL                  READYSTATUS   DBREADYSTATUS   DB NAMES   BACKUP ID
mydb     Oracle      12.2      Enterprise   mydb-svc.db     34.122.76.205:6021   True          True

    As long as there's connectivity to the cluster, you should be able to establish a connection to a database as follows:

    nc -vz 34.122.76.205 6021
Connection to 34.122.76.205 6021 port [tcp/*] succeeded!

sqlplus scott/[email protected]:6021/pdb1.gke

SQL> show user con_id con_name
USER is "SCOTT"

CON_ID
------------------------------
3

CON_NAME
------------------------------
PDB1

    Similar to SQL*Plus, other client side database tools can be used to access an El Carro database.

    Once a Database CR (and the corresponding PDB) is created, it can be modified as described in the appendix B.