Merge pull request #993 from YunoHost/rework-postgresql-first-time-helper

[fix] Rework ynh_psql_test_if_first_run

data/helpers.d/postgresql

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 PSQL_ROOT_PWD_FILE=/etc/yunohost/psql
+PSQL_VERSION=9.6
 
 # Open a connection as a user
 #
@@ -273,6 +274,7 @@ ynh_psql_remove_db() {
 }
 
 # Create a master password and set up global settings
+# It also make sure that postgresql is installed and running
 # Please always call this script in install and restore scripts
 #
 # usage: ynh_psql_test_if_first_run
@@ -280,45 +282,38 @@ ynh_psql_remove_db() {
 # Requires YunoHost version 2.7.13 or higher.
 ynh_psql_test_if_first_run() {
 
-    if [ -f "$PSQL_ROOT_PWD_FILE" ]
+    # Make sure postgresql is indeed installed
+    dpkg --list | grep -q "ii  postgresql-$PSQL_VERSION" || ynh_die "postgresql-$PSQL_VERSION is not installed !?"
+
+    # Check for some weird issue where postgresql could be installed but etc folder would not exist ...
+    [ -e "/etc/postgresql/$PSQL_VERSION" ] || ynh_die "It looks like postgresql was not properly configured ? /etc/postgresql/$PSQL_VERSION is missing ... Could be due to a locale issue, c.f.https://serverfault.com/questions/426989/postgresql-etc-postgresql-doesnt-exist"
+
+    # Make sure postgresql is started and enabled
+    # (N.B. : to check the active state, we check the cluster state because
+    # postgresql could be flagged as active even though the cluster is in
+    # failed state because of how the service is configured..)
+    systemctl is-active postgresql@$PSQL_VERSION-main -q || ynh_systemd_action --service_name=postgresql --action=restart
+    systemctl is-enabled postgresql -q || systemctl enable postgresql
+
+    # If this is the very first time, we define the root password
+    # and configure a few things
+    if [ ! -f "$PSQL_ROOT_PWD_FILE" ]
     then
-        ynh_print_info --message="PostgreSQL is already installed, no need to create master password"
+        local pg_hba=/etc/postgresql/$PSQL_VERSION/main/pg_hba.conf
-        return
+
+        local psql_root_password="$(ynh_string_random)"
+        echo "$psql_root_password" >$PSQL_ROOT_PWD_FILE
+        sudo --login --user=postgres psql -c"ALTER user postgres WITH PASSWORD '$psql_root_password'" postgres
+
+        # force all user to connect to local databases using hashed passwords
+        # https://www.postgresql.org/docs/current/static/auth-pg-hba-conf.html#EXAMPLE-PG-HBA.CONF
+        # Note: we can't use peer since YunoHost create users with nologin
+        #  See: https://github.com/YunoHost/yunohost/blob/unstable/data/helpers.d/user
+        ynh_replace_string --match_string="local\(\s*\)all\(\s*\)all\(\s*\)peer" --replace_string="local\1all\2all\3md5" --target_file="$pg_hba"
+
+        # Integrate postgresql service in yunohost
+        yunohost service add postgresql --log "/var/log/postgresql/"
+
+        ynh_systemd_action --service_name=postgresql --action=reload
     fi
-
-    local psql_root_password="$(ynh_string_random)"
-    echo "$psql_root_password" >$PSQL_ROOT_PWD_FILE
-
-    if [ -e /etc/postgresql/9.4/ ]
-    then
-        local pg_hba=/etc/postgresql/9.4/main/pg_hba.conf
-        local logfile=/var/log/postgresql/postgresql-9.4-main.log
-    elif [ -e /etc/postgresql/9.6/ ]
-    then
-        local pg_hba=/etc/postgresql/9.6/main/pg_hba.conf
-        local logfile=/var/log/postgresql/postgresql-9.6-main.log
-    else
-        if dpkg --list | grep -q "ii  postgresql-9."
-        then
-            ynh_die "It looks like postgresql was not properly configured ? /etc/postgresql/9.* is missing ... Could be due to a locale issue, c.f.https://serverfault.com/questions/426989/postgresql-etc-postgresql-doesnt-exist"
-        else
-            ynh_die "postgresql shoud be 9.4 or 9.6"
-        fi
-    fi
-
-    ynh_systemd_action --service_name=postgresql --action=start
-
-    sudo --login --user=postgres psql -c"ALTER user postgres WITH PASSWORD '$psql_root_password'" postgres
-
-    # force all user to connect to local databases using hashed passwords
-    # https://www.postgresql.org/docs/current/static/auth-pg-hba-conf.html#EXAMPLE-PG-HBA.CONF
-    # Note: we can't use peer since YunoHost create users with nologin
-    #  See: https://github.com/YunoHost/yunohost/blob/unstable/data/helpers.d/user
-    ynh_replace_string --match_string="local\(\s*\)all\(\s*\)all\(\s*\)peer" --replace_string="local\1all\2all\3md5" --target_file="$pg_hba"
-
-    # Advertise service in admin panel
-    yunohost service add postgresql --log "$logfile"
-
-    systemctl enable postgresql
-    ynh_systemd_action --service_name=postgresql --action=reload
 }