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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

Ian Wienand authored on 2017/08/08 14:06:26
Showing 1 changed files

lib/apache

History View file @ 41e6e12

@@ -132,6 +132,10 @@ function install_apache_wsgi {
                          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