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(v2.3.0.0) Validating Migratable VM and LSF Communications

Owned by Yajing Wang
Last updated: Nov 21, 2024Version comment
2 min read

Validation of Migratable VM Joined to Your LSF Cluster

The script test_createVm.sh exists for a quick validation that new compute resources can successfully connect and register with the scheduler.

./test_createVm.sh -h xvm0 -i <IMAGE_NAME> -u user_data.sh

  1. The hostname specified with -h xvm0 is arbitrary.

  2. The Image Name specified with -i <IMAGE_NAME> should correspond to the Image Name from the parse_helper.sh command and the environment setup earlier.

  3. The -u user_data.sh is available for any customization that may be required: temporarily changing a password to faciliate logging in, for example.

  4. The test_createVm.shscript will continuously output updates until the VM is created. When the VM is ready, the script will exit and you’ll see all the fields in the output are now filled with values:

    1. Waiting for xvm0... (4) NodeName: xvm0 Controller: az1-qeuiptjx-1 Controller IP: 172.31.57.160 Vm IP: 172.31.48.108

  5. With the Vm IP above, ssh to the node and to inspect the compute node. This step is meant to provide a migratable VM so that sanity checking may occur:

    1. Have network mounts appeared as expected?

    2. Is authentication working as intended?

    3. What commands are required to finish bootstrapping?

    4. Et cetera.

  6. Iterate and validate as many times as required to satisfy all requirements.

  7. Lastly, LSF services should be started at the end of bootstrapping.

    1. It may take 5 minutes or longer for the LSF services to register with the LSF Master Host.

    2. When the RC Execution Host is properly registered, it will be visible via the lshost command.

  8. To remove this temporary VM:

    1. Replace VM_NAME with the name of the VM , -h xvm0 example above.

    2. curl -X DELETE http://${MGMT_SERVER_IP}:5000/v1/xcompute/vm/VM_NAME

  9. When totally satisfied, place final versions of the user_data scripts in the ${LSF_RC_CONF_DIR}/exostellar/conf directory.

    1. There needs to be a per-pool user_data script in that folder. It can be overwritten at any time a change is needed and the next time a node is instantiated from that pool, the node will get the changes.

    2. A common scenario is that all the user_data scripts are identical, but it could be beneficial for different pools to have different user_data bootstrapping assets. If they are identical, links can be placed in the ${LSF_RC_CONF_DIR}/exostellar/conf directory instead of individual files.

    3. The auto-generated user_data scripts are initially located in ${LSF_RC_CONF_DIR}/exostellar/scripts. After copying them to ${LSF_RC_CONF_DIR}/exostellar/conf and modifying them, be sure to set their permissions so LSF can use them, e.g.: