django-orchestra/orchestra/contrib/saas/backends/moodle.py

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import os
import textwrap
from urllib.parse import urlparse
from django.utils.translation import ugettext_lazy as _
from orchestra.contrib.orchestration import ServiceController, replace
from .. import settings
class MoodleMuBackend(ServiceController):
"""
Creates a Moodle site on a Moodle multisite installation
// config.php
$site_map = array(
// "<HTTP_HOST>" => ["<SITE_NAME>", "<WWWROOT>"],
);
wwwroot = "https://{$site}-courses.pangea.org";
$site = getenv("SITE");
if ( $site == '' ) {
http_host = $_SERVER['HTTP_HOST'];
if (array_key_exists($http_host, $site_map)) {
$site = $site_map[$http_host][0];
$wwwroot = $site_map[$http_host][1];
} elseif (strpos($http_host, '-courses.') !== false) {
$site = array_shift((explode("-courses.", $http_host)));
} else {
$site = array_shift((explode(".", $http_host)));
}
}
$CFG->prefix = "${site}_";
$CFG->wwwroot = $wwwroot;
$CFG->dataroot = "/home/pangea/moodledata/{$site}/";
"""
verbose_name = _("Moodle multisite")
model = 'saas.SaaS'
default_route_match = "saas.service == 'moodle'"
def save(self, webapp):
context = self.get_context(webapp)
self.append(textwrap.dedent("""\
mkdir -p %(moodledata_path)s
chown %(user)s:%(user)s %(moodledata_path)s
export SITE=%(site_name)s
CHANGE_PASSWORD=0
php %(moodle_path)s/admin/cli/install_database.php \\
--fullname="%(site_name)s" \\
--shortname="%(site_name)s" \\
--adminpass="%(password)s" \\
--adminemail="%(email)s" \\
--non-interactive \\
--agree-license \\
--allow-unstable || CHANGE_PASSWORD=1
""") % context
)
if context['password']:
self.append(textwrap.dedent("""\
mysql \\
--host="%(db_host)s" \\
--user="%(db_user)s" \\
--password="%(db_pass)s" \\
--execute='UPDATE %(site_name)s_user
SET password=MD5("%(password)s")
WHERE username="admin"' \\
%(db_name)s
""") % context
)
if context['crontab']:
context['escaped_crontab'] = context['crontab'].replace('$', '\\$')
self.append(textwrap.dedent("""\
# Configuring Moodle crontabs
if ! crontab -u %(user)s -l | grep 'Moodle:"%(site_name)s"' > /dev/null; then
cat << EOF | su %(user)s --shell /bin/bash -c 'crontab'
$(crontab -u %(user)s -l)
# %(banner)s - Moodle:"%(site_name)s"
%(escaped_crontab)s
EOF
fi""") % context
)
self.delete_site_map(context)
if context['custom_url']:
self.insert_site_map(context)
def delete_site_map(self, context):
self.append(textwrap.dedent("""\
sed -i '/^\s*"[^\s]*"\s*=>\s*\["%(site_name)s",\s*".*/d' %(moodle_path)s/config.php
""") % context
)
def insert_site_map(self, context):
self.append(textwrap.dedent("""\
regex='\s*\$site_map\s+=\s+array\('
newline=' "%(custom_domain)s" => ["%(site_name)s", "%(custom_url)s"], // %(banner)s'
sed -i -r "s#$regex#\$site_map = array(\\n$newline#" %(moodle_path)s/config.php
""") % context
)
def delete(self, saas):
context = self.get_context(saas)
self.append(textwrap.dedent("""
rm -rf %(moodledata_path)s
# Delete tables with prefix %(site_name)s
mysql -Nrs \\
--host="%(db_host)s" \\
--user="%(db_user)s" \\
--password="%(db_pass)s" \\
--execute='SET GROUP_CONCAT_MAX_LEN=10000;
SET @tbls = (SELECT GROUP_CONCAT(TABLE_NAME)
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = "%(db_name)s"
AND TABLE_NAME LIKE "%(site_name)s_%%");
SET @delStmt = CONCAT("DROP TABLE ", @tbls);
-- SELECT @delStmt;
PREPARE stmt FROM @delStmt;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;' \\
%(db_name)s
""") % context
)
if context['crontab']:
context['crontab_regex'] = '\\|'.join(context['crontab'].splitlines())
context['crontab_regex'] = context['crontab_regex'].replace('*', '\\*')
self.append(textwrap.dedent("""\
crontab -u %(user)s -l \\
| grep -v 'Moodle:"%(site_name)s"\\|%(crontab_regex)s' \\
| su %(user)s --shell /bin/bash -c 'crontab'
""") % context
)
self.delete_site_map(context)
def get_context(self, saas):
context = {
'banner': self.get_banner(),
'name': saas.name,
'site_name': saas.name,
'full_name': "%s course" % saas.name.capitalize(),
'moodle_path': settings.SAAS_MOODLE_PATH,
'user': settings.SAAS_MOODLE_SYSTEMUSER,
'db_user': settings.SAAS_MOODLE_DB_USER,
'db_pass': settings.SAAS_MOODLE_DB_PASS,
'db_name': settings.SAAS_MOODLE_DB_NAME,
'db_host': settings.SAAS_MOODLE_DB_HOST,
'email': saas.account.email,
'password': getattr(saas, 'password', None),
'custom_url': saas.custom_url,
'custom_domain': urlparse(saas.custom_url).netloc if saas.custom_url else None,
}
context.update({
'crontab': settings.SAAS_MOODLE_CRONTAB % context,
'db_name': context['db_name'] % context,
'moodledata_path': settings.SAAS_MOODLE_DATA_PATH % context,
})
return context