diff --git a/scripts/backup b/scripts/backup
index f99225d..b47e9e7 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -29,9 +29,6 @@ ynh_print_info --message="Loading installation settings..."
 app=$YNH_APP_INSTANCE_NAME
 
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-db_name=$(ynh_app_setting_get --app=$app --key=db_name)
-phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 datadir=$(ynh_app_setting_get --app=$app --key=datadir)
 
 #=================================================
@@ -39,11 +36,6 @@ datadir=$(ynh_app_setting_get --app=$app --key=datadir)
 #=================================================
 ynh_print_info --message="Declaring files to be backed up..."
 
-### N.B. : the following 'ynh_backup' calls are only a *declaration* of what needs
-### to be backuped and not an actual copy of any file. The actual backup that
-### creates and fill the archive with the files happens in the core after this
-### script is called. Hence ynh_backups calls takes basically 0 seconds to run.
-
 #=================================================
 # BACKUP THE APP MAIN DIR
 #=================================================
@@ -56,25 +48,6 @@ ynh_backup --src_path="$final_path"
 
 ynh_backup --src_path="$datadir" --is_big
 
-#=================================================
-# BACKUP THE NGINX CONFIGURATION
-#=================================================
-
-ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
-
-#=================================================
-# BACKUP THE PHP-FPM CONFIGURATION
-#=================================================
-
-ynh_backup --src_path="/etc/php/$phpversion/fpm/pool.d/$app.conf"
-
-#=================================================
-# BACKUP FAIL2BAN CONFIGURATION
-#=================================================
-
-ynh_backup --src_path="/etc/fail2ban/jail.d/$app.conf"
-ynh_backup --src_path="/etc/fail2ban/filter.d/$app.conf"
-
 #=================================================
 # SPECIFIC BACKUP
 #=================================================
@@ -89,24 +62,6 @@ ynh_backup --src_path="/etc/logrotate.d/$app"
 
 ynh_backup --src_path="/etc/systemd/system/$app.service"
 
-#=================================================
-# BACKUP VARIOUS FILES
-#=================================================
-
-ynh_backup --src_path="/etc/cron.d/$app"
-
-ynh_backup --src_path="/etc/$app/"
-
-#=================================================
-# BACKUP THE MYSQL DATABASE
-#=================================================
-ynh_print_info --message="Backing up the MySQL database..."
-
-### (However, things like MySQL dumps *do* take some time to run, though the
-### copy of the generated dump to the archive still happens later)
-
-ynh_mysql_dump_db --database="$db_name" > db.sql
-
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 1be949b..40dfd55 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -28,13 +28,9 @@ ynh_script_progression --message="Loading installation settings..." --weight=1
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-db_name=$(ynh_app_setting_get --app=$app --key=db_name)
-db_user=$db_name
-phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 datadir=$(ynh_app_setting_get --app=$app --key=datadir)
+port=$(ynh_find_port --port=9200)
 
 #=================================================
 # CHECK IF THE APP CAN BE RESTORED
@@ -61,12 +57,6 @@ ynh_script_progression --message="Restoring the app main directory..." --weight=
 
 ynh_restore_file --origin_path="$final_path"
 
-# FIXME: this should be managed by the core in the future
-# Here, as a packager, you may have to tweak the ownerhsip/permissions
-# such that the appropriate users (e.g. maybe www-data) can access
-# files in some cases.
-# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
-# this will be treated as a security issue.
 chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
 chown -R $app:www-data "$final_path"
@@ -80,24 +70,18 @@ ynh_restore_file --origin_path="$datadir" --not_mandatory
 
 mkdir -p $datadir
 
-# FIXME: this should be managed by the core in the future
-# Here, as a packager, you may have to tweak the ownerhsip/permissions
-# such that the appropriate users (e.g. maybe www-data) can access
-# files in some cases.
-# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
-# this will be treated as a security issue.
 chmod 750 "$datadir"
 chmod -R o-rwx "$datadir"
 chown -R $app:www-data "$datadir"
 
 #=================================================
-# RESTORE FAIL2BAN CONFIGURATION
+# CREATE PID DIRECTORY
 #=================================================
-ynh_script_progression --message="Restoring the Fail2Ban configuration..." --weight=1
 
-ynh_restore_file --origin_path="/etc/fail2ban/jail.d/$app.conf"
-ynh_restore_file --origin_path="/etc/fail2ban/filter.d/$app.conf"
-ynh_systemd_action --action=restart --service_name=fail2ban
+mkdir -p "/run/$app"
+
+chmod 700 "/run/$app"
+chown $app:$app "/run/$app"
 
 #=================================================
 # SPECIFIC RESTORATION
@@ -109,38 +93,6 @@ ynh_script_progression --message="Reinstalling dependencies..." --weight=1
 # Define and install dependencies
 ynh_install_app_dependencies $pkg_dependencies
 
-#=================================================
-# RESTORE THE PHP-FPM CONFIGURATION
-#=================================================
-ynh_script_progression --message="Restoring the PHP-FPM configuration..." --time --weight=1
-
-ynh_restore_file --origin_path="/etc/php/$phpversion/fpm/pool.d/$app.conf"
-
-#=================================================
-# RESTORE THE NGINX CONFIGURATION
-#=================================================
-ynh_script_progression --message="Restoring the NGINX web server configuration..." --time --weight=1
-
-ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
-
-#=================================================
-# RESTORE THE MYSQL DATABASE
-#=================================================
-ynh_script_progression --message="Restoring the MySQL database..." --weight=1
-
-db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
-ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
-ynh_mysql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
-
-#=================================================
-# RESTORE VARIOUS FILES
-#=================================================
-ynh_script_progression --message="Restoring various files..." --weight=1
-
-ynh_restore_file --origin_path="/etc/cron.d/$app"
-
-ynh_restore_file --origin_path="/etc/$app/"
-
 #=================================================
 # RESTORE SYSTEMD
 #=================================================
@@ -161,7 +113,7 @@ ynh_restore_file --origin_path="/etc/logrotate.d/$app"
 #=================================================
 ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
 
-yunohost service add $app --description="A short description of the app" --log="/var/log/$app/$app.log"
+yunohost service add $app --description="OpenSearch - Open source distributed and RESTful search engine" --log="/var/log/$app/$app.log"
 
 #=================================================
 # START SYSTEMD SERVICE
@@ -170,16 +122,6 @@ ynh_script_progression --message="Starting a systemd service..." --weight=1
 
 ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
 
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# RELOAD NGINX AND PHP-FPM
-#=================================================
-ynh_script_progression --message="Reloading NGINX web server and PHP-FPM..." --weight=1
-
-ynh_systemd_action --service_name=php$phpversion-fpm --action=reload
-ynh_systemd_action --service_name=nginx --action=reload
-
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index e240210..fb9fe3b 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -17,6 +17,8 @@ ynh_script_progression --message="Loading installation settings..." --weight=1
 app=$YNH_APP_INSTANCE_NAME
 
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+datadir=$(ynh_app_setting_get --app=$app --key=datadir)
+port=$(ynh_app_setting_get --app=$app --key=port)
 
 #=================================================
 # CHECK VERSION
@@ -73,23 +75,6 @@ ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
 ### If nobody installed your app before 4.1,
 ### then you may safely remove these lines
 
-# Cleaning legacy permissions
-if ynh_legacy_permissions_exists; then
-	ynh_legacy_permissions_delete_all
-
-	ynh_app_setting_delete --app=$app --key=is_public
-fi
-
-if ! ynh_permission_exists --permission="admin"; then
-	# Create the required permissions
-	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
-fi
-
-# Create a permission if needed
-if ! ynh_permission_exists --permission="api"; then
-	ynh_permission_create --permission="api" --url="/api" --allowed="visitors" --show_tile="false" --protected="true"
-fi
-
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
@@ -104,21 +89,15 @@ ynh_system_user_create --username=$app --home_dir="$final_path"
 
 if [ "$upgrade_type" == "UPGRADE_APP" ]
 then
-	ynh_script_progression --message="Upgrading source files..." --weight=1
+	ynh_script_progression --message="Upgrading source files..." --weight=20
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$final_path"
+	ynh_setup_source --dest_dir="$final_path" --keep="config/opensearch.yml"
 fi
 
-# FIXME: this should be managed by the core in the future
-# Here, as a packager, you may have to tweak the ownerhsip/permissions
-# such that the appropriate users (e.g. maybe www-data) can access
-# files in some cases.
-# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
-# this will be treated as a security issue.
 chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
-chown -R $app:www-data "$final_path"
+chown -R $app:$app "$final_path"
 
 #=================================================
 # UPGRADE DEPENDENCIES
@@ -127,52 +106,15 @@ ynh_script_progression --message="Upgrading dependencies..." --weight=1
 
 ynh_install_app_dependencies $pkg_dependencies
 
-#=================================================
-# PHP-FPM CONFIGURATION
-#=================================================
-ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=1
-
-# Create a dedicated PHP-FPM config
-ynh_add_fpm_config
-
-#=================================================
-# NGINX CONFIGURATION
-#=================================================
-ynh_script_progression --message="Upgrading NGINX web server configuration..." --time --weight=1
-
-# Create a dedicated NGINX config
-ynh_add_nginx_config
-
-#=================================================
-# SPECIFIC UPGRADE
-#=================================================
-# ...
-#=================================================
-
 #=================================================
 # UPDATE A CONFIG FILE
 #=================================================
 ynh_script_progression --message="Updating a configuration file..." --weight=1
 
-### Same as during install
-###
-### The file will automatically be backed-up if it's found to be manually modified (because
-### ynh_add_config keeps track of the file's checksum)
+ynh_add_config --template="opensearch.yml" --destination="$final_path/config/opensearch.yml"
 
-ynh_add_config --template="some_config_file" --destination="$final_path/some_config_file"
-
-# FIXME: this should be handled by the core in the future
-# You may need to use chmod 600 instead of 400,
-# for example if the app is expected to be able to modify its own config
-chmod 400 "$final_path/some_config_file"
-chown $app:$app "$final_path/some_config_file"
-
-### For more complex cases where you want to replace stuff using regexes,
-### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
-### When doing so, you also need to manually call ynh_store_file_checksum
-###
-### ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$final_path/some_config_file"
-### ynh_store_file_checksum --file="$final_path/some_config_file"
+chmod 400 "$final_path/config/opensearch.yml"
+chown $app:$app "$final_path/config/opensearch.yml"
 
 #=================================================
 # SETUP SYSTEMD
@@ -197,7 +139,7 @@ ynh_use_logrotate --non-append
 #=================================================
 ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
 
-yunohost service add $app --description="A short description of the app" --log="/var/log/$app/$app.log"
+yunohost service add $app --description="OpenSearch - Open source distributed and RESTful search engine" --log="/var/log/$app/$app.log"
 
 #=================================================
 # START SYSTEMD SERVICE
@@ -206,21 +148,6 @@ ynh_script_progression --message="Starting a systemd service..." --weight=1
 
 ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
 
-#=================================================
-# UPGRADE FAIL2BAN
-#=================================================
-ynh_script_progression --message="Reconfiguring Fail2Ban..." --weight=1
-
-# Create a dedicated Fail2Ban config
-ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Regex to match into the log for a failed login"
-
-#=================================================
-# RELOAD NGINX
-#=================================================
-ynh_script_progression --message="Reloading NGINX web server..." --weight=1
-
-ynh_systemd_action --service_name=nginx --action=reload
-
 #=================================================
 # END OF SCRIPT
 #=================================================