Re: sync apt/dpkg state between systems?

[Thilo Six <T.Six@gmx.de>]

Hello


Excerpt from Bob Proulx:


-- <snip> --

>   # rsync -av /mnt/backup/etc/ /etc/
>   # rsync -n --delete -av /mnt/backup/etc/ /etc/
>   # rsync --delete -av /mnt/backup/etc/ /etc/

-- <snip> --

I believe this not to be a good idea. When you do this you mess around with
config files under the control of dpkg. With all the mess that creates.

I would reinstall everything you had/need again and then diff prior to mass
overwriting the files.

dirdif ()
{
    \diff -qrB --exclude='.hg' --exclude='.git' "${1%/}" "${2%/}"
}
[

'/var/lib/apt/extended_states' has the complete package list and knows which
packages are autoinstalled and which have been installed manually.

If you don't mind i attach my own '/etc/cron.daily/etckeeper' (it is only 4k)
which takes care for me to commit those important data into hg.
You can modify it to use your referred vcs instead.

It also compiles a list of installed packages into '/etc/apt/backup/'. Look at
the top of it.

Hope this is useful to you.

-- 
Regards,
Thilo

4096R/0xC70B1A8F
721B 1BA0 095C 1ABA 3FC6  7C18 89A4 A2A0 C70B 1A8F

#!/bin/bash
set -e

# enter debug mode:
# set -x

MY_APT_BACKUP_DIR=/etc/apt/backup

[ -d "${MY_APT_BACKUP_DIR}" ] || /bin/mkdir -p "${MY_APT_BACKUP_DIR}"

if [ -x /usr/bin/aptitude ]; then
      /usr/bin/aptitude -F '%p' search '~i~M' >"${MY_APT_BACKUP_DIR}"/packages_autoinstalled
  else
      printf "\naptitude not installed! # apt-get install aptitude\n\n"
      exit 11
fi

/usr/bin/dpkg --get-selections | \
    /usr/bin/awk '$2 == "install"' >"${MY_APT_BACKUP_DIR}"/packages_installed

if [ -x /usr/bin/debconf-get-selections ] ; then
     /usr/bin/debconf-get-selections >"${MY_APT_BACKUP_DIR}"/packages_debconf
  else
      printf "\ndebconf-get-selections not installed! # apt-get install debconf-utils\n\n"
      exit 12
fi



## etckeeper orig:
if [ -x /usr/bin/etckeeper -o -x /usr/sbin/etckeeper ] && [ -e /etc/etckeeper/etckeeper.conf ]; then
	. /etc/etckeeper/etckeeper.conf

	# are we configured?
	if [[ "${VCS}" != "hg" ]] ; then
	    # etckeeper unconfigured! ...abort
	    printf "\netckeeper unconfigured! edit /etc/etckeeper/etckeeper.conf first! \n\n"
	    exit 13
	fi

	if [[ ! -x /usr/bin/hg ]]; then
	    printf "\nmercurial not installed! # apt-get install mercurial \n\n"
	    exit 14
	fi

	if [ "$AVOID_DAILY_AUTOCOMMITS" != "1" ]; then
		# avoid autocommit if an install run is in progress
		lockfile=/var/cache/etckeeper/packagelist.pre-install
		if [ -e "$pe" ] && [ -n "$(find "$lockfile" -mtime +1)" ]; then
			rm -f "$lockfile" # stale
		fi
		if [ ! -e "$lockfile" ]; then
			AVOID_SPECIAL_FILE_WARNING=1
			export AVOID_SPECIAL_FILE_WARNING

		      # /etc
			if [[ ! -d /etc/.hg ]]; then
			    etckeeper init -d /etc
			fi
			etckeeper pre-commit -d /etc >/dev/null 2>&1
			etckeeper list-installed -d /etc >"${MY_APT_BACKUP_DIR}"/packagelist
			if etckeeper unclean -d /etc ; then
			    etckeeper commit "$(hg status -R /etc/)" >/dev/null 2>&1
			fi


		      # /var/backups
		      if [[ -d /var/backups ]]; then
if [ ! -e /var/backups/.hgignore ]; then
    cat > /var/backups/.hgignore <<EOF
syntax: glob

*.gz

EOF
    chown root:root /var/backups/.hgignore
    chmod 0644 /var/backups/.hgignore
fi

			if [[ ! -d /var/backups/.hg ]]; then
			    hg init /var/backups
			fi
			etckeeper pre-commit -d /var/backups/ >/dev/null 2>&1
			if etckeeper unclean -d /var/backups/ ; then
			    etckeeper commit -d /var/backups/ "$(hg status -R /var/backups/)" >/dev/null 2>&1
			fi
		      fi


		      # /var/lib/apt
		      if [[ -d /var/lib/apt ]]; then
if [ ! -e /var/lib/apt/.hgignore ]; then
    cat > /var/lib/apt/.hgignore <<EOF
syntax: glob

lists/*
mirrors/*
*~

EOF
    chown root:root /var/lib/apt/.hgignore
    chmod 0644 /var/lib/apt/.hgignore
fi

			if [[ ! -d /var/lib/apt/.hg ]]; then
			    hg init /var/lib/apt
			fi
			etckeeper pre-commit -d /var/lib/apt/ >/dev/null 2>&1
			if etckeeper unclean -d /var/lib/apt/ ; then
			    etckeeper commit -d /var/lib/apt/ "$(hg status -R /var/lib/apt/)" >/dev/null 2>&1
			fi
		      fi


		      # /var/lib/aptitude
		      if [[ -d /var/lib/aptitude ]]; then
if [ ! -e /var/lib/aptitude/.hgignore ]; then
    cat > /var/lib/aptitude/.hgignore <<EOF
syntax: glob

*.old

EOF
    chown root:root /var/lib/aptitude/.hgignore
    chmod 0644 /var/lib/aptitude/.hgignore
fi
			if [[ ! -d /var/lib/aptitude/.hg ]]; then
			    hg init /var/lib/aptitude
			fi
			etckeeper pre-commit -d /var/lib/aptitude/ >/dev/null 2>&1
			if etckeeper unclean -d /var/lib/aptitude/ ; then
			    etckeeper commit -d /var/lib/aptitude/ "$(hg status -R /var/lib/aptitude/)" >/dev/null 2>&1
			fi
		      fi


		      # /var/lib/dpkg
		      if [[ -d /var/lib/dpkg ]]; then
			if [[ ! -d /var/lib/dpkg/.hg ]]; then
			    hg init /var/lib/dpkg
			fi
			etckeeper pre-commit -d /var/lib/dpkg/ >/dev/null 2>&1
			etckeeper list-installed >/var/lib/dpkg/packagelist
			if etckeeper unclean -d /var/lib/dpkg/ ; then
			    etckeeper commit -d /var/lib/dpkg/ "$(hg status -R /var/lib/dpkg/)" >/dev/null 2>&1
			fi
		      fi
		fi
	fi
fi