Oracle Cloud Administration Scenarios

 

Troubleshoot a VCN issue:

Scenario:

     You are troubleshooting a VCN issue where compute instances in a subnet are unable to access the internet.

Steps:

    1. Check the subnet's route table to make sure that there is a route to the internet gateway.

    2. Check the subnet's security list to make sure that outgoing traffic to the internet is allowed.

    3. Check the compute instances to make sure that they are configured to use the correct subnet and route table.

    4. If you are still having problems, try restarting the compute instances and the router.

Configure a firewall for a complex application:

Scenario:  You are configuring a firewall for a complex application that has multiple components running on different subnets.

Steps:

    1. Identify the different components of the application and the traffic that needs to be allowed between them.

    2. Create security lists for each subnet and configure them to allow the necessary traffic.

    3. If you need to allow traffic between subnets, you can create network security groups (NSGs) and attach them to the resources that need to communicate with each other.

    4. Test the firewall configuration to make sure that the application is working as expected.

Back up a critical database:

Scenario: You need to back up a critical database that is running in OCI.

Steps:

    1. Create a database backup plan that specifies how often you need to back up the database and how long you need to keep the backups.

    2. Use the OCI Console, the OCI CLI, or the OCI SDK to create a database backup.

    3. Store the database backup in a secure location, such as OCI Object Storage.

    4. Test the database backup to make sure that it is restorable.

Implement a disaster recovery plan for a cloud-based application:

Scenario: You need to implement a disaster recovery plan for a cloud-based application that is running in OCI.

Steps:

    1. Identify the critical components of the application and the resources that they need.

    2. Decide how you want to recover the application in the event of a disaster. You may choose to use a combination of the following strategies:

        Replication: Replicate the critical components of the application to another region.

        Failover: Configure the application to fail over to another region in the event of a disaster.

        Backup and restore: Back up the critical components of the application and restore them to another region in the event of a disaster.

    3. Test the disaster recovery plan to make sure that it works as expected.