plh414 2017/2018 File Service Sample Python
Προσθέτουμε στο αρχείο /etc/apache2/sites-available/000-default.conf πριν το κλείσιμο του το παρακάτω και εκτελούμε μετά service apache2 restart
WSGIDaemonProcess fileservicepython user=www-data group=www-data processes=1 threads=5
WSGIScriptAlias /fileservicepython /var/www/fileservicepython/app.wsgi
<Directory /var/www/fileservicepython>
WSGIProcessGroup fileservicepython
WSGIApplicationGroup %{GLOBAL}
Require all granted
</Directory>
It is important to use only 1 process in the WSGIDaemonProcess directive, as each process this process is used to create the ephemeral node for zookeeper for this fileservice.
To use more processes to handle more concurrent requests (and use multiple CPUs), the processes must somehow make sure that only one ephemeral node is created.
Possible deploy script
#!/bin/bash
if [ "$#" -ne 9 ]; then
echo "Illegal number of parameters"
echo "deploy.sh FSID ZOOKEEPER_HOST ZOOKEEPER_USERNAME ZOOKEEPER_PASSWORD SERVERHOSTNAME SERVER_PORT SERVER_SCHEME HMACKEY CONTEXT"
echo "e.g. ../deploy.sh snf-814985.vm.okeanos.grnet.gr username password snf-816668.vm.okeanos.grnet.gr 80 http 7vjTsO0IhSZsNA6ze37Dk/xXw2nphFM9ZAMUkwXgaAA= fileservicepython"
exit -1
fi
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
echo ID=$1 > "$DIR/config.properties"
echo ZOOKEEPER_HOST=$2 >> "$DIR/config.properties"
echo ZOOKEEPER_USER=$3 >> "$DIR/config.properties"
echo ZOOKEEPER_PASSWORD=$4 >> "$DIR/config.properties"
echo SERVERHOSTNAME=$5 >> "$DIR/config.properties"
echo SERVER_PORT=$6 >> "$DIR/config.properties"
echo SERVER_SCHEME=$7 >> "$DIR/config.properties"
echo HMACKEY=$8 >> "$DIR/config.properties"
echo CONTEXT=$9 >> "$DIR/config.properties"
# after deploying, reload apache and wait some time to allow zookeeper to delete a possible previous ephemeral node. Then call status url to reconnect
cd $DIR \
&& rsync -a -v --exclude deploy.sh --exclude .git --exclude data --delete $DIR/ root@$5:/var/www/fileservicepython \
&& ssh root@$5 "chown -R www-data:www-data /var/www/fileservicepython && service apache2 reload && sleep 20 && wget $7://$5:$6/$9/status -O -"
cd $DIR
# ./deploy.sh PFS2 snf-814985.vm.okeanos.grnet.gr username password snf-816668.vm.okeanos.grnet.gr 80 http 7vjTsO0IhSZsNA6ze37Dk/xXw2nphFM9ZAMUkwXgaAA= fileservicepython
# ./deploy.sh PFS1 snf-814985.vm.okeanos.grnet.gr username password snf-814985.vm.okeanos.grnet.gr 80 http 7vjTsO0IhSZsNA6ze37Dk/xXw2nphFM9ZAMUkwXgaAA= fileservicepython
# http://snf-814985.vm.okeanos.grnet.gr/fileservicepython/file/aaa.png
# http://snf-816668.vm.okeanos.grnet.gr/fileservicepython/file/aaa.png