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63004a Jannik Eckhardt 2026-04-26 10:27:13
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# Netbooting Alpine Linux on RAM with iSCSI persisted Storage
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## Requirements
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1. iSCSI Server
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2. NFS Server
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3. HTTP Server running on same path as NFS Server (Port 6007)
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Download Alpine Netboot Images and put on root of NFS and HTTP: vmlinuz-lts, initramfs-lts, modloop-lts
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Also configure router/DHCP Server to give out iPXE (possibly iPXE compiled with custom script to launch :6007/boot.ipxe)
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## Guide
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1. Use iPXE script:
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```
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set local_address http://<IP>:6007
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set alpine_repo http://dl-cdn.alpinelinux.org/alpine/v3.21/main
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kernel ${local_address}/vmlinuz-lts ip=dhcp alpine_repo=${alpine_repo} initrd=initramfs-lts modloop=${local_address}/modloop-lts pkgs=open-iscsi
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initrd ${local_address}/initramfs-lts
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boot
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```
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2. setup-alpine, bei Disks Ctrl+C
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3. apk add nano
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4. nano /etc/lbu/lbu.conf und BACKUP_DIR=/boot
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5. add /boot NFS entry to boot server:
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1. apk add nfs-utils
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2. 10.10.13.236:/mnt/vault/boot /boot nfs4 rw,_netdev 0 0
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3. rc-update add nfsmount
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4. rc-service nfsmount start
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6. lbu ci
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7. Final iPXE script:
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```
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set local_address http://<ip>:6007
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set alpine_repo http://dl-cdn.alpinelinux.org/alpine/v3.21/main
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set apkovl ${local_address}/<hostname>.apkovl.tar.gz
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kernel ${local_address}/vmlinuz-lts ip=dhcp apkovl=${apkovl} alpine_repo=${alpine_repo} initrd=initramfs-lts modloop=${local_address}/modloop-lts pkgs=open-iscsi
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initrd ${local_address}/initramfs-lts
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boot
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```
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8. apk add open-iscsi
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9. edit /etc/iscsi/initiatorname.iscsi
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10. rc-service iscsid start
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11. rc-update add iscsid boot
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12. nano /etc/init.d/mount-after-iscsi
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```
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#!/sbin/openrc-run
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description="Mount all filesystems after iSCSI login"
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depend() {
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need iscsid
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after iscsid
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before docker # put any services that require the iSCSI mount here
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}
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start() {
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ebegin "Running mount -a"
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mount -a
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eend $?
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}
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```
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13. chmod +x /etc/init.d/mount-after-iscsi
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14. rc-update add mount-after-iscsi
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15. lbu inc /etc/init.d/mount-after-iscsi
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16. iscsiadm --mode discovery --type sendtargets --portal IP_OF_TARGET
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17. iscsiadm --mode node --targetname NAME_OF_TARGET --portal IP_OF_TARGET --login
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18. iscsiadm -m node -T NAME_OF_TARGET -p IP_OF_TARGET --op update -n node.conn[0].startup -v automatic
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19. lbu inc /var/lib/iscsi
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20. lbu ci
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21. Partition the iSCSI disk, add mount points to fstab, lbu ci and reboot