Switch Centos/Fedora to Apache woker MPM
In trying to debug periodic gate instability of CentOS, I noticed that
it is using the prefork mpm, while Ubuntu is defaulting to the
multi-threaded worker mpm.
One of the problems seems related to 502 proxy errors from the TLS
proxy. We see out-of-sync timestamps in the centos TLS proxy access
logs, which might be innocent behaviour based on the prefork model or
indicate something else.
Before going too deep down this rabbit-hole, I think it is better for
consistency to use the same mpm model on all our platforms, and start
debugging from there.
Change-Id: I9881f2e7d51fdd9fc0f7fb3e37179aa53171b531
diff --git a/lib/apache b/lib/apache
index ffd7966..dfca25a 100644
--- a/lib/apache
+++ b/lib/apache
@@ -132,6 +132,10 @@
elif is_fedora; then
sudo rm -f /etc/httpd/conf.d/000-*
install_package httpd mod_wsgi
+ # For consistency with Ubuntu, switch to the worker mpm, as
+ # the default is prefork
+ sudo sed -i '/mod_mpm_prefork.so/s/^/#/g' /etc/httpd/conf.modules.d/00-mpm.conf
+ sudo sed -i '/mod_mpm_worker.so/s/^#//g' /etc/httpd/conf.modules.d/00-mpm.conf
elif is_suse; then
install_package apache2 apache2-mod_wsgi
else