Identify Nodes and Update Metadata

Inspect and modify the JSON file

This section applies to all node types. The commands in this section assume the variables from the prerequisites section have been set.

Step 1 - Generate the Boot Script Service (BSS) boot parameters JSON file

  1. Run the following commands from a node that has the Cray CLI initialized:

    ncn-mw# cray bss bootparameters list --name $XNAME --format=json | jq .[] > ${XNAME}.json

Step 2 - Modify the JSON file

  1. Set the kernel parameters to wipe the disk.

    • Locate the portion of the line that contains "metal.no-wipe" and ensure it is set to zero "metal.no-wipe=0".

Step 3 - Re-apply the boot parameters list for the node using the JSON file

  1. Get a token to interact with BSS using the REST API.

    ncn-w# TOKEN=$(curl -s -S -d grant_type=client_credentials \
    -d client_id=admin-client -d client_secret=`kubectl get secrets admin-client-auth \
    -o jsonpath='{.data.client-secret}' | base64 -d` \
    https://api-gw-service-nmn.local/keycloak/realms/shasta/protocol/openid-connect/token \
    | jq -r '.access_token')

  2. Do a PUT action for the new JSON file.

    ncn-mw# curl -i -s -H "Content-Type: application/json" -H "Authorization: Bearer ${TOKEN}" \
"https://api-gw-service-nmn.local/apis/bss/boot/v1/bootparameters" -X PUT -d @./${XNAME}.json

    IMPORTANT: Ensure a good response (HTTP CODE 200) is returned in the output.

Step 4 - Verify the bss bootparameters list command returns the expected information

  1. Export the list from BSS to a file with a different name.

    ncn-mw# cray bss bootparameters list --name ${XNAME} --format=json |jq .[]> ${XNAME}.check.json

  2. Compare the new JSON file with what was PUT to BSS.

    ncn-mw# diff ${XNAME}.json ${XNAME}.check.json
    • The files should be identical.

Proceed to the next step to Wipe Drives or return to the main Rebuild NCNs page.