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update pxe installation #57

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Nov 22, 2024
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update pxe installation #57

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42 changes: 42 additions & 0 deletions miniHPC_step_by_step.md
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Expand Up @@ -255,6 +255,48 @@ dd if=/dev/mmcblk0 of=node.img

- Setup PXE booting

To use eessi with PXE it is necessary to create a loop device for each node in the shared filesystem and then
mount it on /var/lib/cvmfs.

Creating a loop device:
```bash
dd if=/dev/mmcblk0 of=node.img bs=4M count=5120
sudo parted -s /dev/loop0
sudo parted -s /dev/loop0 mklabel msdos
sudo parted -s /dev/loop0 mkpart primary
sudo mkfs.ext4 /dev/loop0
```
Create a script that can be run by systemd on bootup. In /usr/local/bin/cvfms-startup.sh enter:
```
#!/bin/bash

/usr/sbin/losetup /dev/loop0 /sharedfs/loopdevices/${HOSTNAME}
/bin/mount /dev/loop0 /var/lib/cvmfs
```

Create the following systemd service script in /etc/systemd/system/cvfms.service:
```
[Unit]
Description=Setup Loop Device and Mount Shared Filesystem
After=local-fs.target
Requires=local-fs.target

[Service]
Type=oneshot
ExecStart=/usr/local/bin/cvmfs-setup.sh
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target
```

Enable and start the service:
```
sudo systemctl enable cvmfs.service
sudo systemctl start cvmfs.service
```


Download the pxe-boot scripts:

```bash
Expand Down