How to generate a ticket in MapR

To generate a MapR user ticket, you can use the maprlogin command. Here’s a step-by-step guide:

Steps to Generate a MapR User Ticket

1. Open Terminal: Open your terminal window.
2. Run the Command: Use the maprlogin password command to generate a user ticket. This command will prompt you for the user’s password1.

maprlogin password

For example:

maprlogin password [Password for user ‘yourusername’ at cluster ‘your.cluster.com’: ]

3. Generate the Ticket: The command will generate a ticket file and store it in the /tmp directory by default. The ticket file will be named maprticket_<UID>.

Example

Let’s say you want to generate a ticket for the user juser on the cluster my.cluster.com:

maprlogin password [Password for user ‘juser’ at cluster ‘my.cluster.com’: ]

MapR credentials of user ‘juser’ for cluster ‘my.cluster.com’ are written to ‘/tmp/maprticket_1000’

Verify the Ticket

To verify the ticket, you can use the maprlogin print command:

maprlogin print

This command will display the ticket details, including the user, creation time, expiration time, and renewal information.

Renewing ticket

To renew a MapR user ticket, you can use the maprlogin command with the -renewal option. Here’s how you can do it:

Steps to Renew a MapR User Ticket

1. Open Terminal: Open your terminal window.
2. Generate a New Ticket: Use the maprlogin command with the -renewal option to renew the ticket. You’ll need to specify the duration for the renewed ticket1.

maprlogin password -renewal <duration>

Replace <duration> with the desired duration for the renewed ticket (e.g., 30:0:0 for 30 days).

Example

Let’s say you want to renew the ticket for 30 days:

maprlogin password -renewal 30:0:0

Verify the Renewed Ticket

To verify that the ticket has been renewed, you can use the maprlogin print command:

maprlogin print

This command will display the ticket details, including the new expiration date.

Managing Tickets

Managing MapR tickets involves creating, renewing, and revoking user tickets that are required for authentication and authorization in a MapR cluster. Here are the key aspects of ticket management:

1. Generating a Ticket

• Create a User Ticket: Use the maprlogin command to generate a ticket:

maprlogin password

This will prompt you to enter the user’s password and generate a ticket file.

2. Viewing Ticket Information

• Check Ticket Details: Use the maprlogin print command to display the current ticket details:

maprlogin print

This shows the user, creation time, expiration time, and other details of the ticket.

3. Renewing a Ticket

• Renew the Ticket: If your ticket is about to expire, you can renew it using:
•  

maprlogin password -renewal <duration>

Replace <duration> with the desired duration for the renewed ticket (e.g., 30:0:0 for 30 days).

4. Revoking a Ticket

• Revoke a Ticket: To revoke a ticket, you can use the maprcli command:

maprcli session delete -type service -user <username>

Replace <username> with the name of the user whose ticket you want to revoke.

5. Managing Ticket Expiration

• Set Ticket Lifetime: You can set the lifetime of a ticket using the maprcli config save command:

maprcli config save -values { “ticket.lifetime” : “24:0:0” }

This sets the default ticket lifetime to 24 hours.

6. Checking Ticket Validity

• Validate Ticket: To check if a ticket is still valid, you can use the maprlogin command:

maprlogin info

This command provides information on the validity and expiration of the ticket.

Best Practices

• Regular Renewal: Ensure tickets are renewed regularly to avoid authentication issues.
• Monitor Expiration: Keep track of ticket expiration times and set reminders if necessary.
• Secure Storage: Store ticket files securely and restrict access to authorized users only.
• Use Service Tickets: For applications and services, use service tickets that have appropriate lifetimes and permissions.

By following these steps and best practices, you can effectively manage MapR user tickets and ensure smooth operation of your MapR cluster.