Step 5 – Configure the connection to the AWS PCS cluster - AWS PCS

Step 5 – Configure the connection to the AWS PCS cluster

To establish a connection to the AWS PCS cluster, launch sackd as a system service by following these steps.

Note

If you use Slurm 25.05 or later, you can use a script to set up your login node to connect to multiple clusters instead. For more information, see Connecting a standalone login node to multiple clusters in AWS PCS.

  1. Set up the environment file for the sackd service with the command that follows. Before running the command, replace ip-address and port with the values retrieved from endpoints in Step 1.

    sudo echo "SACKD_OPTIONS='--conf-server=ip-address:port'" > /etc/sysconfig/sackd

  2. Create a systemd service file for managing the sackd process.

    sudo cat << EOF > /etc/systemd/system/sackd.service
[Unit]
Description=Slurm auth and cred kiosk daemon
After=network-online.target remote-fs.target
Wants=network-online.target
ConditionPathExists=/etc/sysconfig/sackd

[Service]
Type=notify
EnvironmentFile=/etc/sysconfig/sackd
User=slurm
Group=slurm
RuntimeDirectory=slurm
RuntimeDirectoryMode=0755
ExecStart=/opt/aws/pcs/scheduler/slurm-25.05/sbin/sackd --systemd \$SACKD_OPTIONS
ExecReload=/bin/kill -HUP \$MAINPID
KillMode=process
LimitNOFILE=131072
LimitMEMLOCK=infinity
LimitSTACK=infinity

[Install]
WantedBy=multi-user.target
EOF

  3. Set ownership of the sackd service file.

    sudo chown root:root /etc/systemd/system/sackd.service && \
    sudo chmod 0644 /etc/systemd/system/sackd.service

  4. Enable the sackd service.

    sudo systemctl daemon-reload && sudo systemctl enable sackd

  5. Start the sackd service.

    sudo systemctl start sackd