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Command 'drbdsetup-84 Secondary 0' Terminated With Exit Code 11

8 min read Oct 06, 2024
Command 'drbdsetup-84 Secondary 0' Terminated With Exit Code 11

The error message "command 'drbdsetup-84 secondary 0' terminated with exit code 11" typically indicates a problem with configuring a secondary node in a DRBD (Distributed Replicated Block Device) setup. This error code suggests that the command failed due to an unrecoverable error during the setup process.

Understanding the Error

DRBD is a software solution that creates mirrored, block-level storage devices across multiple servers. This provides high availability and fault tolerance, meaning that if one server fails, the other server can take over seamlessly. The drbdsetup command is used to initialize and manage the configuration of DRBD.

drbdsetup-84 refers to a specific instance of the drbdsetup command, where '84' likely corresponds to a unique identifier or resource name assigned to your DRBD setup. The 'secondary 0' argument indicates that you are attempting to configure the secondary node for the specific resource.

Exit code 11 is a generic error code that suggests the command encountered a fatal error during execution. The precise cause of this error can vary, but some common possibilities include:

  • Configuration Issues: The DRBD configuration file may contain errors, such as missing or incorrect parameters.
  • Network Problems: The communication between the primary and secondary nodes might be disrupted, preventing the secondary node from joining the DRBD cluster.
  • Disk Space: The secondary node might not have enough disk space allocated for the DRBD resource.
  • Permissions: The user running the drbdsetup command may lack the necessary permissions to modify the required files or directories.
  • Resource Conflicts: The resource identifier (84) might already be in use by another DRBD resource or process.

Troubleshooting Steps

To effectively troubleshoot this error, you need to gather more information and investigate the underlying issue. Follow these steps:

  1. Examine the DRBD Configuration:

    • Review the /etc/drbd.d/ directory for the DRBD configuration file related to your resource (e.g., /etc/drbd.d/drbd.84.conf).
    • Look for any syntax errors, missing parameters, or conflicting settings.
    • Ensure that the configuration parameters on both the primary and secondary nodes match.

  2. Check Network Connectivity:

    • Verify that the primary and secondary nodes can communicate over the network using tools like ping or telnet.
    • Test the communication protocols (TCP or UDP) used by DRBD.
    • Ensure that any firewalls or security settings are not blocking the necessary traffic.

  3. Analyze Disk Space:

    • Verify that the secondary node has sufficient disk space available for the DRBD resource.
    • Use the df -h command to check the available space on the target disk.
    • Ensure that the disk has enough free space to accommodate the entire DRBD resource.

  4. Verify Permissions:

    • Ensure that the user executing drbdsetup has the necessary permissions to access the DRBD configuration files and manage the target disk.
    • Use the ls -l command to check the file permissions.
    • If necessary, modify the permissions using the chown or chmod commands.

  5. Check for Resource Conflicts:

    • Run drbd-manage show all on both the primary and secondary nodes to check for existing resources and their associated identifiers.
    • Ensure that the resource identifier (84) is not already in use by another DRBD resource or process.
    • If there are conflicts, adjust the resource identifier in the configuration file.

  6. Review the System Logs:

    • Check the system logs for any relevant error messages or warnings that may provide clues about the issue.
    • Look in the DRBD log file (/var/log/messages or similar) and the kernel log (dmesg).

  7. Consider the DRBD Version:

    • Make sure that the DRBD version is consistent across the primary and secondary nodes.
    • Compatibility issues between different versions of DRBD can cause problems.

Example:

Let's say you have a DRBD configuration file (drbd.84.conf) with the following settings:

resource drbd.84 {
  protocol C;
  net {
    address 192.168.1.100;
    port 7788;
  }
  on primary {
    device /dev/sdb1;
  }
  on secondary {
    device /dev/sdc1;
  }
}

If you encounter the error "command 'drbdsetup-84 secondary 0' terminated with exit code 11," you might check:

  • Network connectivity: Ensure that the secondary node can reach the primary node at the specified address (192.168.1.100) and port (7788).
  • Disk space: Verify that the secondary node has enough free space on /dev/sdc1 for the DRBD resource.
  • Permissions: Make sure the user running drbdsetup has permission to modify the /dev/sdc1 device and the related configuration files.
  • Conflicting resources: Double-check that the resource identifier (84) is not already in use by another DRBD resource.

Conclusion

Troubleshooting the "command 'drbdsetup-84 secondary 0' terminated with exit code 11" error requires a systematic approach involving examining the DRBD configuration, network connectivity, disk space, permissions, and potential resource conflicts. By carefully reviewing these aspects and addressing any issues identified, you can resolve the problem and successfully set up your secondary DRBD node. Remember to consult the DRBD documentation for specific instructions and additional troubleshooting tips.

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