297 lines
12 KiB
Python
297 lines
12 KiB
Python
import os
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import textwrap
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from collections import OrderedDict
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from django.template import Template, Context
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from django.utils.translation import ugettext_lazy as _
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from orchestra.contrib.orchestration import ServiceController
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from . import WebAppServiceMixin
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from .. import settings, utils
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class PHPBackend(WebAppServiceMixin, ServiceController):
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"""
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PHP support for apache-mod-fcgid and php-fpm.
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It handles switching between these two PHP process management systemes.
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"""
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MERGE = settings.WEBAPPS_MERGE_PHP_WEBAPPS
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verbose_name = _("PHP FPM/FCGID")
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default_route_match = "webapp.type.endswith('php')"
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doc_settings = (settings, (
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'WEBAPPS_MERGE_PHP_WEBAPPS',
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'WEBAPPS_FPM_DEFAULT_MAX_CHILDREN',
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'WEBAPPS_PHP_CGI_BINARY_PATH',
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'WEBAPPS_PHP_CGI_RC_DIR',
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'WEBAPPS_PHP_CGI_INI_SCAN_DIR',
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'WEBAPPS_FCGID_CMD_OPTIONS_PATH',
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'WEBAPPS_PHPFPM_POOL_PATH',
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'WEBAPPS_PHP_MAX_REQUESTS',
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))
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def save(self, webapp):
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context = self.get_context(webapp)
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self.create_webapp_dir(context)
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if webapp.type_instance.is_fpm:
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self.save_fpm(webapp, context)
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elif webapp.type_instance.is_fcgid:
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self.save_fcgid(webapp, context)
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else:
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raise TypeError("Unknown PHP execution type")
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self.append("# Clean non-used PHP FCGID wrappers and FPM pools")
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self.delete_fcgid(webapp, context, preserve=True)
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self.delete_fpm(webapp, context, preserve=True)
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self.set_under_construction(context)
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def save_fpm(self, webapp, context):
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self.append(textwrap.dedent("""
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# Generate FPM configuration
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read -r -d '' fpm_config << 'EOF' || true
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%(fpm_config)s
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EOF
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{
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echo -e "${fpm_config}" | diff -N -I'^\s*;;' %(fpm_path)s -
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} || {
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echo -e "${fpm_config}" > %(fpm_path)s
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UPDATED_FPM=1
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}
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""") % context
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)
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def save_fcgid(self, webapp, context):
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self.append("mkdir -p %(wrapper_dir)s" % context)
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self.append(textwrap.dedent("""
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# Generate FCGID configuration
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read -r -d '' wrapper << 'EOF' || true
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%(wrapper)s
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EOF
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{
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echo -e "${wrapper}" | diff -N -I'^\s*#' %(wrapper_path)s -
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} || {
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echo -e "${wrapper}" > %(wrapper_path)s
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if [[ %(is_mounted)i -eq 1 ]]; then
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# Reload fcgid wrapper (All PHP versions, because of version changing support)
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pkill -SIGHUP -U %(user)s "^php[0-9\.]+-cgi$" || true
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fi
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}
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chmod 550 %(wrapper_dir)s
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chmod 550 %(wrapper_path)s
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chown -R %(user)s:%(group)s %(wrapper_dir)s""") % context
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)
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if context['cmd_options']:
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self.append(textwrap.dedent("""\
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# FCGID options
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read -r -d '' cmd_options << 'EOF' || true
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%(cmd_options)s
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EOF
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{
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echo -e "${cmd_options}" | diff -N -I'^\s*#' %(cmd_options_path)s -
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} || {
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echo -e "${cmd_options}" > %(cmd_options_path)s
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[[ ${UPDATED_APACHE} -eq 0 ]] && UPDATED_APACHE=%(is_mounted)i
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}
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""" ) % context
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)
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else:
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self.append("rm -f %(cmd_options_path)s\n" % context)
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def delete(self, webapp):
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context = self.get_context(webapp)
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if webapp.type_instance.is_fpm:
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self.delete_fpm(webapp, context)
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elif webapp.type_instance.is_fcgid:
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self.delete_fcgid(webapp, context)
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self.delete_webapp_dir(context)
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def has_sibilings(self, webapp, context):
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return type(webapp).objects.filter(
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account=webapp.account_id,
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data__contains='"php_version":"%s"' % context['php_version'],
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).exclude(id=webapp.pk).exists()
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def all_versions_to_delete(self, webapp, context, preserve=False):
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context_copy = dict(context)
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for php_version, verbose in settings.WEBAPPS_PHP_VERSIONS:
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if preserve and php_version == context['php_version']:
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continue
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php_version_number = utils.extract_version_number(php_version)
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context_copy['php_version'] = php_version
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context_copy['php_version_number'] = php_version_number
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if not self.MERGE or not self.has_sibilings(webapp, context_copy):
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yield context_copy
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def delete_fpm(self, webapp, context, preserve=False):
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""" delete all pools in order to efectively support changing php-fpm version """
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for context_copy in self.all_versions_to_delete(webapp, context, preserve):
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context_copy['fpm_path'] = settings.WEBAPPS_PHPFPM_POOL_PATH % context_copy
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self.append("rm -f %(fpm_path)s" % context_copy)
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def delete_fcgid(self, webapp, context, preserve=False):
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""" delete all pools in order to efectively support changing php-fcgid version """
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for context_copy in self.all_versions_to_delete(webapp, context, preserve):
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context_copy.update({
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'wrapper_path': settings.WEBAPPS_FCGID_WRAPPER_PATH % context_copy,
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'cmd_options_path': settings.WEBAPPS_FCGID_CMD_OPTIONS_PATH % context_copy,
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})
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self.append("rm -f %(wrapper_path)s" % context_copy)
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self.append("rm -f %(cmd_options_path)s" % context_copy)
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def prepare(self):
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super(PHPBackend, self).prepare()
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self.append(textwrap.dedent("""
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BACKEND="PHPBackend"
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echo "$BACKEND" >> /dev/shm/reload.apache2
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function coordinate_apache_reload () {
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# Coordinate Apache reload with other concurrent backends (e.g. Apache2Backend)
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is_last=0
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counter=0
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while ! mv /dev/shm/reload.apache2 /dev/shm/reload.apache2.locked; do
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sleep 0.1;
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if [[ $counter -gt 4 ]]; then
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echo "[ERROR]: Apache reload synchronization deadlocked!" >&2
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exit 10
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fi
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counter=$(($counter+1))
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done
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state="$(grep -v "$BACKEND" /dev/shm/reload.apache2.locked)" || is_last=1
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[[ $is_last -eq 0 ]] && {
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echo "$state" | grep -v ' RELOAD$' || is_last=1
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}
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if [[ $is_last -eq 1 ]]; then
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echo "[DEBUG]: Last backend to run, update: $UPDATED_APACHE, state: '$state'"
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if [[ $UPDATED_APACHE -eq 1 || "$state" =~ .*RELOAD$ ]]; then
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if service apache2 status > /dev/null; then
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service apache2 reload
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else
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service apache2 start
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fi
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fi
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rm /dev/shm/reload.apache2.locked
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else
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echo -n "$state" > /dev/shm/reload.apache2.locked
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if [[ $UPDATED_APACHE -eq 1 ]]; then
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echo -e "[DEBUG]: Apache will be reloaded by another backend:\\n${state}"
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echo "$BACKEND RELOAD" >> /dev/shm/reload.apache2.locked
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fi
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mv /dev/shm/reload.apache2.locked /dev/shm/reload.apache2
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fi
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}""")
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)
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def commit(self):
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context = {
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'reload_pool': settings.WEBAPPS_PHPFPM_RELOAD_POOL,
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}
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self.append(textwrap.dedent("""
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# Apply changes if needed
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if [[ $UPDATED_FPM -eq 1 ]]; then
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%(reload_pool)s
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fi
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coordinate_apache_reload
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""") % context
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)
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super(PHPBackend, self).commit()
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def get_fpm_config(self, webapp, context):
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options = webapp.type_instance.get_options()
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context.update({
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'init_vars': webapp.type_instance.get_php_init_vars(merge=self.MERGE),
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'max_children': options.get('processes', settings.WEBAPPS_FPM_DEFAULT_MAX_CHILDREN),
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'request_terminate_timeout': options.get('timeout', False),
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})
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context['fpm_listen'] = webapp.type_instance.FPM_LISTEN % context
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fpm_config = Template(textwrap.dedent("""\
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;; {{ banner }}
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[{{ user }}]
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user = {{ user }}
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group = {{ group }}
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listen = {{ fpm_listen | safe }}
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listen.owner = {{ user }}
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listen.group = {{ group }}
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pm = ondemand
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pm.max_requests = {{ max_requests }}
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pm.max_children = {{ max_children }}
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{% if request_terminate_timeout %}
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request_terminate_timeout = {{ request_terminate_timeout }}{% endif %}
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{% for name, value in init_vars.items %}
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php_admin_value[{{ name | safe }}] = {{ value | safe }}{% endfor %}
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"""
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))
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return fpm_config.render(Context(context))
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def get_fcgid_wrapper(self, webapp, context):
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opt = webapp.type_instance
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# Format PHP init vars
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init_vars = opt.get_php_init_vars(merge=self.MERGE)
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if init_vars:
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init_vars = [ " \\\n -d %s='%s'" % (k, v.replace("'", '"')) for k,v in init_vars.items() ]
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init_vars = ''.join(init_vars)
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context.update({
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'php_binary_path': os.path.normpath(settings.WEBAPPS_PHP_CGI_BINARY_PATH % context),
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'php_rc': os.path.normpath(settings.WEBAPPS_PHP_CGI_RC_DIR % context),
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'php_ini_scan': os.path.normpath(settings.WEBAPPS_PHP_CGI_INI_SCAN_DIR % context),
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'php_init_vars': init_vars,
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})
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context['php_binary'] = os.path.basename(context['php_binary_path'])
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return textwrap.dedent("""\
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#!/bin/sh
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# %(banner)s
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export PHPRC=%(php_rc)s
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export PHP_INI_SCAN_DIR=%(php_ini_scan)s
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export PHP_FCGI_MAX_REQUESTS=%(max_requests)s
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exec %(php_binary_path)s%(php_init_vars)s""") % context
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def get_fcgid_cmd_options(self, webapp, context):
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options = webapp.type_instance.get_options()
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maps = OrderedDict(
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MaxProcesses=options.get('processes', None),
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IOTimeout=options.get('timeout', None),
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)
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cmd_options = []
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for directive, value in maps.items():
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if value:
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cmd_options.append(
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"%s %s" % (directive, value.replace("'", '"'))
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)
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if cmd_options:
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head = (
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'# %(banner)s\n'
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'FcgidCmdOptions %(wrapper_path)s'
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) % context
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cmd_options.insert(0, head)
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return ' \\\n '.join(cmd_options)
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def update_fcgid_context(self, webapp, context):
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wrapper_path = settings.WEBAPPS_FCGID_WRAPPER_PATH % context
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context.update({
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'wrapper': self.get_fcgid_wrapper(webapp, context),
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'wrapper_path': wrapper_path,
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'wrapper_dir': os.path.dirname(wrapper_path),
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})
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context.update({
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'cmd_options': self.get_fcgid_cmd_options(webapp, context),
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'cmd_options_path': settings.WEBAPPS_FCGID_CMD_OPTIONS_PATH % context,
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})
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return context
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def update_fpm_context(self, webapp, context):
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context.update({
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'fpm_config': self.get_fpm_config(webapp, context),
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'fpm_path': settings.WEBAPPS_PHPFPM_POOL_PATH % context,
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})
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return context
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def get_context(self, webapp):
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context = super().get_context(webapp)
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context.update({
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'max_requests': settings.WEBAPPS_PHP_MAX_REQUESTS,
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})
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self.update_fpm_context(webapp, context)
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self.update_fcgid_context(webapp, context)
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return context
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