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92 lines
2.3 KiB
92 lines
2.3 KiB
#!/bin/bash
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set -eux
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[ -n "${DOMAIN}" ] || {
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echo "Error: you must set \$DOMAIN prior to running this script." >&2
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exit 1
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}
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[ -n "${BACKUP_SERVER}" ] || {
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echo "Error: you must set \$BACKUP_SERVER prior to running this script." >&2
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exit 1
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}
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KEY_BACKUP_ID=${KEY_BACKUP_ID:-rsync}
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KEY_COMMENTARY="$KEY_BACKUP_ID@$DOMAIN"
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MIRROR_DIR_PATH="${MIRROR_DIR_PATH:-$PWD/resources/bin/mirror-dir}"
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[ -e "$MIRROR_DIR_PATH" ] || {
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echo "Error: you must set \$MIRROR_DIR_PATH or be the root of the charm to run this script." >&2
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exit 1
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}
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## rsync
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type -p rsync >/dev/null 2>&1 || apt-get install -y rsync </dev/null
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## creating rsync user
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mkdir -p /var/lib/rsync
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getent group rsync >/dev/null ||
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groupadd -r rsync
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getent passwd rsync >/dev/null ||
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useradd -r rsync -d /var/lib/rsync -g rsync
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chown rsync:rsync /var/lib/rsync
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## rsync ssh key creation
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if [ -e /var/lib/rsync/.ssh/id_rsa.pub ]; then
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## Mainly for update of old solution
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content=$(cat /var/lib/rsync/.ssh/id_rsa.pub)
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commentary=${content##* }
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if [ "${commentary}" != "$KEY_COMMENTARY" ]; then
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echo "Updating ssh key commentary from '${commentary}' to '$KEY_COMMENTARY'" >&2
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sed -ri "s/ [^ ]+\$/ $KEY_COMMENTARY/" /var/lib/rsync/.ssh/id_rsa.pub
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fi
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else
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su -c 'ssh-keygen -t rsa -N "" -f ~/.ssh/id_rsa -q -C '"$KEY_COMMENTARY" - rsync
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fi
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dest="$BACKUP_SERVER"
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if [[ "$dest" == *"/"* ]]; then
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dest="${dest%/*}"
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fi
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if [[ "$dest" == *":"* ]]; then
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ssh_options+=("-p" "${dest#*:}")
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dest="${dest%%:*}"
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fi
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ssh-keyscan "${ssh_options[@]}" -H "${dest}" > /var/lib/rsync/.ssh/known_hosts
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apt-get install -y kal-shlib-{common,process,cmdline,array} </dev/null
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case $(awk -Wversion 2>/dev/null || awk --version) in
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"mawk 1.3.3"*)
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## Not good, it is from 1996, and we still find it on Debian 10
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apt-get install -y gawk </dev/null
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;;
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esac
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ln -sf "$PWD/resources/bin/mirror-dir" /usr/local/sbin/mirror-dir
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if ! [ -e /etc/mirror-dir/config.yml ]; then
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mkdir -p /etc/mirror-dir
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cat <<EOF > /etc/mirror-dir/config.yml
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default:
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sources:
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- /etc
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EOF
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fi
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cat <<EOF > /etc/cron.d/mirror-dir
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SHELL=/bin/bash
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PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
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$((RANDOM % 60)) $((RANDOM % 4))-23/4 * * * root mirror-dir backup -q -h "$DOMAIN" -d "$BACKUP_SERVER"
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EOF
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