What Should I Pay Attention to When Logging In to the Server After the First Time Ever I Executed a Switchover, Failover, or DR Drill?

After you have performed a switchover, failover, or DR drill for the first time:

• If your servers are installed with Cloud-Init/Cloudbase-Init, Cloud-Init/Cloudbase-Init will start along with the server's first startup to inject the initial data. In this case, the password or key pair used to log in to the production site server, disaster recovery site server, or drill server will change.
• If your servers are not installed with Cloud-Init/Cloudbase-Init, the password or key pair used to log in to the production site server, disaster recovery site server, or drill server will not change.

The following uses a switchover or failover as the example operation. For the login constraints on drill servers, see those for DR site servers.

In the following example, Server A and server B are deployed. Table 1 shows the servers before and after the operation.

Detailed login constraints are described as follows:

Scenario 1: Server A runs Windows and does not have Cloudbase-Init installed. After the first time switchover or failover:

• If your servers use password for login, you can use the password of Server A to log in to the production site server (Server B) or disaster recovery site server (Server A).
• If your servers use key pair for login, you can use the obtained password of Server A to log in to the production site server (Server B) or disaster recovery site server (Server A).

After the first time switchover or failover, the password or key pair remains the same for the subsequent switchovers or failovers. In this example:

You can use the password of Server A to log in to the production site server or disaster recovery site server.

Scenario 2: Server A runs Windows and already has Cloudbase-Init installed. After the first time switchover or failover:

• When your servers use password for login,

  If Cloudbase-Init is not started (normally within 3 to 5 minutes after the production site server starts), you can use the password of Server B for login.

  After Cloudbase-Init is started, the login password of Server B becomes invalid. Reset the password and use the new password for login.

• When your servers use key pair for login,

  If Cloudbase-Init is not started (normally within 3 to 5 minutes after the production site server starts), you can use the obtained login password of Server B for login.

  After Cloudbase-Init is started, the obtained login password of Server B becomes invalid. Obtain the password again.

After the first time switchover or failover, the password or key pair remains the same for the subsequent switchovers or failovers. In this example:

• Login using a password: Reset the password of Server B and use the new password for login.
• Login using a key pair: Obtain the password of Server B again and use the obtained password to log in to Server B.