Enable ncsd on UANs

Configure User Access Nodes (UANs) to start the ncsd service at boot time.

The nscd service is not currently enabled by default and systemd does not start it at boot time. There are two ways to start nscd on UAN nodes: manually starting the service or enabling the service in the UAN image. While restarting nscd manually has to be performed each time the UAN is rebooted, enabling nscd in the image only has to be done once. Then all UANs that use the image will have nscd started automatically on boot.

Start ncsd manually on each UAN

  1. Log into a UAN.

  2. (uan#) Start ncsd using systemctl.

    systemctl start nscd

  3. Repeat the previous two steps for every UAN.

Enable ncsd in the UAN image

  1. Determine the ID of the image used by the UAN.

    This ID can be found in the BOS session template used to boot the UAN:

    {
   "boot_sets": {
     "uan": {
       "boot_ordinal": 2,
       "kernel_parameters": "console=ttyS0,115200 bad_page=panic crashkernel=340M hugepagelist=2m-2g intel_iommu=off intel_pstate=disable iommu=pt ip=nmn0:dhcp numa_interleave_omit=headless numa_zonelist_order=node oops=panic pageblock_order=14 pcie_ports=native printk.synchronous=y quiet rd.neednet=1 rd.retry=10 rd.shell turbo_boost_limit=999 ifmap=net2:nmn0,lan0:hsn0,lan1:hsn1 spire_join_token=${SPIRE_JOIN_TOKEN}",
     "network": "nmn",
     "node_list": [
        "LIST_OF_APPLICATION_NODES"
     ],
     "path": "s3://boot-images/IMS_IMAGE_ID/manifest.json",
     "rootfs_provider": "cpss3",
     "rootfs_provider_passthrough": "dvs:api-gw-service-nmn.local:300:nmn0",
     "type": "s3"
     }
   },
   "cfs": {
     "configuration": "uan-config-PRODUCT_VERSION"
   },
   "enable_cfs": true,
   "name": "uan-sessiontemplate-PRODUCT_VERSION"
}

    The image ID is found in the path field inside the boot_sets object.

    1. Enable the ncsd service in the image.

      (chroot#) Use the procedure Customize an Image Root Using IMS and run the following commands in the image chroot:

      systemctl enable nscd.service
/tmp/images.sh

    2. Obtain the new resultant image ID from the previous step.

    3. Update the UAN BOS session template with the new image ID.

      See Create UAN Boot Images for instructions on updating the BOS session template.

    4. Reboot the UANs with the updated session template.

      See Boot UANs.