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Make read-only bind mount work with unpatched kernels (i.e. uglify mount commands by a lot)

master
Janek Bevendorff 7 years ago
parent
commit
181b05d116
  1. 44
      README.md
  2. 18
      server/etc/fstab
  3. 21
      server/etc/fstab_synology
  4. 18
      server/etc/fstab_ubuntu

44
README.md

@ -50,21 +50,28 @@ The optional third parameter specifies the path to the SSH public key file which
rs-backup-suite can chroot backup users into the backup home base directory. For this to work you need to create a few bind mounts. The install script already created the respective lines in your `/etc/fstab` for you. If you don't need any special configuration on your system, all you need to do is to uncomment everything between the `BEGIN` and `END` lines (do NOT change these two lines, though):
# BEGIN: rs-backup-suite
#/bin /bkp/bin none bind,ro 0 0
#/lib /bkp/lib none bind,ro 0 0
#/dev /bkp/dev none bind,ro 0 0
#/usr/bin /bkp/usr/bin none bind,ro 0 0
#/usr/lib /bkp/usr/lib none bind,ro 0 0
#/usr/share/perl5 /bkp/usr/share/perl5 none bind,ro 0 0
#/bin /bkp/bin none bind 0 0
#/bin /bkp/bin none remount,ro 0 0
#/lib /bkp/lib none bind 0 0
#/lib /bkp/lib none remount,ro 0 0
#/dev /bkp/dev none bind 0 0
#/dev /bkp/dev none remount,ro 0 0
#/usr/bin /bkp/usr/bin none bind 0 0
#/usr/bin /bkp/usr/bin none remount,ro 0 0
#/usr/lib /bkp/usr/lib none bind 0 0
#/usr/lib /bkp/usr/lib none remount,ro 0 0
#/usr/share/perl5 /bkp/usr/share/perl5 none bind 0 0
#/usr/share/perl5 /bkp/usr/share/perl5 none remount,ro 0 0
# END: rs-backup-suite
The necessary mounts may differ from system to system. For instance, Ubuntu needs `/usr/share/perl` instead of `/usr/share/perl5`. Synology DSM doesn't need `/usr/share/*` at all, but requires `/opt/bin`, `/opt/lib` and `/opt/libexec`. But in most cases you don't need to worry about that since the install script tries to make the correct decisions for you.
**NOTE:** If your 64-bit system doesn't have a `/lib` folder but only `/lib64` you may need to change the `/lib` line in your `/etc/fstab` as follows:
/lib64 /bkp/lib64 none bind 0 0
/lib64 /bkp/lib64 none bind 0 0
/lib64 /bkp/lib64 none remount,ro 0 0
Don't forget to rename `/bkp/lib` to `/bkp/lib64`.
Don't forget to rename `/bkp/lib` to `/bkp/lib64`. The do the same with `/usr/lib` / `/usr/lib64`.
When you're done, add this to the end of your `/etc/ssh/sshd_config`:
@ -166,13 +173,20 @@ To run the server component on Synology DSM, you need to install the following p
If you want to run your backups in a chroot environment please note that `/etc/fstab` will be reset to its defaults when rebooting the disk station. To avoid configuration loss, no mount directives are added to `/etc/fstab` by the install script. Instead the following entries are added to `/etc/rc` (which won't be overwritten upon reboot):
# BEGIN: rs-backup-suite
#mount -o bind,ro /bin /var/services/homes/bin
#mount -o bind,ro /lib /var/services/homes/lib
#mount -o bind,ro /dev /var/services/homes/dev
#mount -o bind,ro /usr/bin /var/services/homes/usr/bin
#mount -o bind,ro /opt/bin /var/services/homes/opt/bin
#mount -o bind,ro /opt/lib /var/services/homes/opt/lib
#mount -o bind,ro /opt/libexec /var/services/homes/opt/libexec
#mount -o bind /bin /var/services/homes/bin
#mount -o remount,ro /var/services/homes/bin
#mount -o bind /lib /var/services/homes/lib
#mount -o remount,ro /var/services/homes/lib
#mount -o bind /dev /var/services/homes/dev
#mount -o remount,ro /var/services/homes/dev
#mount -o bind /usr/bin /var/services/homes/usr/bin
#mount -o remount,ro /var/services/homes/usr/bin
#mount -o bind /opt/bin /var/services/homes/opt/bin
#mount -o remount,ro /var/services/homes/opt/bin
#mount -o bind /opt/lib /var/services/homes/opt/lib
#mount -o remount,ro /var/services/homes/opt/lib
#mount -o bind /opt/libexec /var/services/homes/opt/libexec
#mount -o remount,ro /var/services/homes/opt/libexec
# END: rs-backup-suite
To enable the mounts, uncomment everything between the `BEGIN` and `END` block. Afterwards either run these commands by hand once or reboot.

18
server/etc/fstab

@ -1,8 +1,14 @@
# BEGIN: rs-backup-suite
#/bin ::BACKUP_ROOT::/bin none bind,ro 0 0
#/lib ::BACKUP_ROOT::/lib none bind,ro 0 0
#/dev ::BACKUP_ROOT::/dev none bind,ro 0 0
#/usr/bin ::BACKUP_ROOT::/usr/bin none bind,ro 0 0
#/usr/lib ::BACKUP_ROOT::/usr/lib none bind,ro 0 0
#/usr/share/perl5 ::BACKUP_ROOT::/usr/share/perl5 none bind,ro 0 0
#/bin ::BACKUP_ROOT::/bin none bind 0 0
#/bin ::BACKUP_ROOT::/bin none remount,ro 0 0
#/lib ::BACKUP_ROOT::/lib none bind 0 0
#/lib ::BACKUP_ROOT::/lib none remount,ro 0 0
#/dev ::BACKUP_ROOT::/dev none bind 0 0
#/dev ::BACKUP_ROOT::/dev none remount,ro 0 0
#/usr/bin ::BACKUP_ROOT::/usr/bin none bind 0 0
#/usr/bin ::BACKUP_ROOT::/usr/bin none remount,ro 0 0
#/usr/lib ::BACKUP_ROOT::/usr/lib none bind 0 0
#/usr/lib ::BACKUP_ROOT::/usr/lib none remount,ro 0 0
#/usr/share/perl5 ::BACKUP_ROOT::/usr/share/perl5 none bind 0 0
#/usr/share/perl5 ::BACKUP_ROOT::/usr/share/perl5 none remount,ro 0 0
# END: rs-backup-suite

21
server/etc/fstab_synology

@ -1,9 +1,16 @@
# BEGIN: rs-backup-suite
#mount -o bind,ro /bin ::BACKUP_ROOT::/bin
#mount -o bind,ro /lib ::BACKUP_ROOT::/lib
#mount -o bind,ro /dev ::BACKUP_ROOT::/dev
#mount -o bind,ro /usr/bin ::BACKUP_ROOT::/usr/bin
#mount -o bind,ro /opt/bin ::BACKUP_ROOT::/opt/bin
#mount -o bind,ro /opt/lib ::BACKUP_ROOT::/opt/lib
#mount -o bind,ro /opt/libexec ::BACKUP_ROOT::/opt/libexec
#mount -o bind /bin ::BACKUP_ROOT::/bin
#mount -o remount,ro ::BACKUP_ROOT::/bin
#mount -o bind /lib ::BACKUP_ROOT::/lib
#mount -o remount,ro ::BACKUP_ROOT::/lib
#mount -o bind /dev ::BACKUP_ROOT::/dev
#mount -o remount,ro ::BACKUP_ROOT::/dev
#mount -o bind /usr/bin ::BACKUP_ROOT::/usr/bin
#mount -o remount,ro ::BACKUP_ROOT::/usr/bin
#mount -o bind /opt/bin ::BACKUP_ROOT::/opt/bin
#mount -o remount,ro ::BACKUP_ROOT::/opt/bin
#mount -o bind /opt/lib ::BACKUP_ROOT::/opt/lib
#mount -o remount,ro ::BACKUP_ROOT::/opt/lib
#mount -o bind /opt/libexec ::BACKUP_ROOT::/opt/libexec
#mount -o remount,ro ::BACKUP_ROOT::/opt/libexec
# END: rs-backup-suite

18
server/etc/fstab_ubuntu

@ -1,8 +1,14 @@
# BEGIN: rs-backup-suite
#/bin ::BACKUP_ROOT::/bin none bind,ro 0 0
#/lib ::BACKUP_ROOT::/lib none bind,ro 0 0
#/dev ::BACKUP_ROOT::/dev none bind,ro 0 0
#/usr/bin ::BACKUP_ROOT::/usr/bin none bind,ro 0 0
#/usr/lib ::BACKUP_ROOT::/usr/lib none bind,ro 0 0
#/usr/share/perl ::BACKUP_ROOT::/usr/share/perl none bind,ro 0 0
#/bin ::BACKUP_ROOT::/bin none bind 0 0
#/bin ::BACKUP_ROOT::/bin none remount,ro 0 0
#/lib ::BACKUP_ROOT::/lib none bind 0 0
#/lib ::BACKUP_ROOT::/lib none remount,ro 0 0
#/dev ::BACKUP_ROOT::/dev none bind 0 0
#/dev ::BACKUP_ROOT::/dev none remount,ro 0 0
#/usr/bin ::BACKUP_ROOT::/usr/bin none bind 0 0
#/usr/bin ::BACKUP_ROOT::/usr/bin none remount,ro 0 0
#/usr/lib ::BACKUP_ROOT::/usr/lib none bind 0 0
#/usr/lib ::BACKUP_ROOT::/usr/lib none remount,ro 0 0
#/usr/share/perl ::BACKUP_ROOT::/usr/share/perl none bind 0 0
#/usr/share/perl ::BACKUP_ROOT::/usr/share/perl none remount,ro 0 0
# END: rs-backup-suite
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