From: Christian Heller <c.heller@plomlompom.de>
Date: Fri, 14 Feb 2020 22:13:52 +0000 (+0100)
Subject: Experimental refactor of migration scripts.
X-Git-Url: https://plomlompom.com/repos/%7B%7Bdb.prefix%7D%7D/%7B%7B%20web_path%20%7D%7D/decks/templates?a=commitdiff_plain;h=19bd8ce75275c6d6d737dbdf78ab3d969369b19f;p=config

Experimental refactor of migration scripts.
---

diff --git a/buster/setup_scripts/backup_app.sh b/buster/setup_scripts/backup_app.sh
new file mode 100755
index 0000000..ada3eb1
--- /dev/null
+++ b/buster/setup_scripts/backup_app.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+set -e
+set -x
+
+if [ "$#" -lt 3 ]; then
+    echo 'Need at least three arguments: service name, DB name, and backup directory names.'
+    #echo 'Need at least two arguments: service name and backup directory or (prefixed with "db:") DB names.'
+    false
+fi
+app="$1"
+db_name="$2"
+shift 2
+
+cd /tmp
+rm -rf "/tmp/${app}_backup"
+
+app "${app}" stop
+
+su postgres -lc "pg_dump -d ${db_name} --format=custom -f ${app}_backup/pgdump"
+for target in "$@"; do
+    cp -a "${target}" "${app}_backup${target}"
+done
+#for target in "$@"; do
+#    prefix=$(echo "${target}" | cut -c-3)
+#    if [ "${prefix}" = "DB:" ]; then
+#        db_name=$(echo "${ŧarget}" | cut -c4-)
+#    else
+#        cp -a "${target}" "backup${target}"
+#    fi
+#done
+
+tar cf "${app}_backup.tar" "${app}_backup"
+rm -rf "${app}_backup"
+chown plom:plom "${app}_backup.tar"
+mv "${app}_backup.tar" /home/plom
diff --git a/buster/setup_scripts/migrate_app.sh b/buster/setup_scripts/migrate_app.sh
new file mode 100755
index 0000000..c0e1637
--- /dev/null
+++ b/buster/setup_scripts/migrate_app.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+set -e
+set -x
+
+if [ "$#" -lt 4 ]; then
+    echo 'Need at least four arguments: old server IP, service name, DB name, and backup directory names.'
+    false
+fi
+if [ ! "$1" = "pleroma" ] && [ ! "$1" = "peertube" ]; then
+    echo "Need legal service name (pleroma or peertube)."
+    false
+fi
+server_ip="$1"
+app="$2"
+db_name="$3"
+shift 3
+
+config_tree_prefix="${HOME}/config/buster"
+setup_scripts_dir="${config_tree_prefix}/setup_scripts"
+
+cd "${setup_scripts_dir}"
+./prepare_to_meet_server.sh "${server_ip}"
+read -p'Hit Enter when you are done.' ignore
+eval $(ssh-agent) && ssh-add
+echo 'Enter password for root on target server next.'
+ssh plom@"${server_ip}" 'su -lc "cd config/buster/setup_scripts && git pull && ./backup_${app}.sh ${app} ${db_name} $@"'
+scp plom@"${server_ip}":~/${app}_backup.tar /home/plom/${app}_backup.tar
+./restore_${app}.sh
diff --git a/buster/setup_scripts/restore_app.sh b/buster/setup_scripts/restore_app.sh
new file mode 100755
index 0000000..cb30788
--- /dev/null
+++ b/buster/setup_scripts/restore_app.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+set -e
+set -x
+
+if [ "$#" -lt 2 ]; then
+    echo 'Need two arguments: service name and DB name.'
+    false
+fi
+if [ ! "$1" = "pleroma" ] && [ ! "$1" = "peertube" ]; then
+    echo "Need legal service name (pleroma or peertube)."
+    false
+fi
+app="$1"
+db_name="$2"
+
+service "${app}" stop
+
+mv "/home/plom/${app}_backup.tar" /tmp/
+cd /tmp
+tar xf "${app}_backup.tar"
+
+su postgres -c "pg_restore -c -C -d ${db_name} -1 ${app}_backup/${db_name}.pgdump"
+rm "${app}_backup/${db_name}.pgdump"
+
+cd "${app}_backup"
+for path in $/find . -type f); do
+    target_path=$(echo "${path}" | cut -c2-)
+    source_path=$(realpath "${path}")
+    dir=$(dirname "${target_path}")
+    mkdir -p "${dir}"
+    cp -a "${source_path}" "${target_path}"
+done
+
+# TODO: Horrible hack, improve.
+if [ "${app}" = "pleroma" ]; then
+    db_pw=$(cat /etc/pleroma/config.exs | grep password | sed 's/[ ]*password\: *//g' | sed 's/,//g' | sed 's/"//g')
+elif [ "${app}" = "peertube" ]; then
+    db_pw=$(cat /var/www/peertube/config/production.yaml | grep password | head -1 | sed "s/[ ]*password\: *//g" | sed "s/'//g")
+fi
+su postgres -lc "psql -c \"ALTER USER ${app} WITH PASSWORD '${db_pw}';\""
+
+service "${app}" stop