Upgrade, squashfs, backup and restore

Installing and Using OpenWrt
1

Hi,

I'm trying to figure the best way to maintain my r4s router over upgrade / reinstall.

I'm using a squashfs SD Card.

I'm wondering if the /overlay/upper could be used as a base for backup (ie. on a USB/NAS drive).

Can I consider that only /overlay/upper/etc is important ?

Listing installed package

Consider adding "production" package to image

My idea for reinstall/minor upgrade:

  • backup a selected set of files from /overlay/upper/etc
  • list custom installed packages
  • burn a new SD Card from an image
  • reinstall packages (or add them to image)
  • copy the backup on /overlay/upper/etc

What do you think ?

Or should I use sysupgrade (but can it handle upgrade ?)

is this page uptodate (some scripts are very old)

Here are the config files in my current /overlay/upper/etc
(I should not have updated my packages)

/overlay/upper/etc/board.json
/overlay/upper/etc/config/network
/overlay/upper/etc/config/system
/overlay/upper/etc/config/dhcp
/overlay/upper/etc/config/dropbear
/overlay/upper/etc/config/firewall
/overlay/upper/etc/config/luci
/overlay/upper/etc/config/rpcd
/overlay/upper/etc/config/ucitrack
/overlay/upper/etc/config/uhttpd
/overlay/upper/etc/config/collectd
/overlay/upper/etc/config/luci-opkg
/overlay/upper/etc/config/luci_statistics
/overlay/upper/etc/config/irqbalance
/overlay/upper/etc/config/irqbalance-opkg
/overlay/upper/etc/uhttpd.crt
/overlay/upper/etc/uhttpd.key
/overlay/upper/etc/dropbear/dropbear_ed25519_host_key
/overlay/upper/etc/dropbear/dropbear_rsa_host_key
/overlay/upper/etc/dropbear/authorized_keys
/overlay/upper/etc/shadow
/overlay/upper/etc/passwd
/overlay/upper/etc/urandom.seed
/overlay/upper/etc/shadow-
/overlay/upper/etc/passwd-
/overlay/upper/etc/init.d/ucitrack
/overlay/upper/etc/init.d/urngd
/overlay/upper/etc/init.d/collectd
/overlay/upper/etc/init.d/luci_statistics
/overlay/upper/etc/init.d/irqbalance
/overlay/upper/etc/luci-uploads/.placeholder
/overlay/upper/etc/hotplug.d/net/40-net-smp-affinity

Are there some files to exclude in some case ?

Crypto can be regenerate sometime

/overlay/upper/etc/uhttpd.crt
/overlay/upper/etc/uhttpd.key
/overlay/upper/etc/dropbear/dropbear_ed25519_host_key
/overlay/upper/etc/dropbear/dropbear_rsa_host_key

empty files

/overlay/upper/etc/luci-uploads/.placeholder
2

What are you trying to accomplish that auc and LuCI Attended Sysupgrade don't already do? Moving across releases, where packages are renamed, added or deleted, or something else?

For backups I use sysupgrade -l to see what's in my backups (augmented with my custom stuff in /etc/sysupgrade.conf), then use sysupgrade -b backup.tgz to do the actual backup (scping it off to my NAS).

1 Like
3

I'm trying to decypher the doc that is not always uptodate (but well maintained).

But OK I'm start with sysupgrade !