Description of problem:

For keystone, healthcheck script is failing with below error

~~~
[root@ctl01 conf.d]# /usr/bin/podman exec --user root keystone /openstack/healthcheck
+ . /usr/share/openstack-tripleo-common/healthcheck/common.sh
++ set -x
++ set -euo pipefail
++ : 0
++ '[' 0 -ne 0 ']'
++ exec
++ : 10
++ : curl-healthcheck
++ : '\n%{http_code}' '%{remote_ip}:%{remote_port}' '%{time_total}' 'seconds\n'
++ : /dev/null
++ get_url_from_vhost /etc/httpd/conf.d/10-keystone_wsgi.conf
++ vhost_file=/etc/httpd/conf.d/10-keystone_wsgi.conf
++ test -n /etc/httpd/conf.d/10-keystone_wsgi.conf
++ test -r /etc/httpd/conf.d/10-keystone_wsgi.conf
+++ awk '/ServerName/ {print $2}' /etc/httpd/conf.d/10-keystone_wsgi.conf
++ server_name=overcloud.example.com
+++ awk '/SSLEngine/ {print $2}' /etc/httpd/conf.d/10-keystone_wsgi.conf
++ ssl_enabled=on
+++ grep -h '<VirtualHost .*>' /etc/httpd/conf.d/10-keystone_wsgi.conf
+++ sed 's/<VirtualHost .*:\(.*\)>/\1/'
++ bind_port=35357
+++ awk '/WSGIScriptAlias/ {print $2}' /etc/httpd/conf.d/10-keystone_wsgi.conf
++ wsgi_alias='/
^(/v3/OS-FEDERATION/identity_providers/.*?/protocols/.*?/auth)$'
++ proto=http
++ [[ on == \o\n ]]
++ proto=https
++ [[ /
^(/v3/OS-FEDERATION/identity_providers/.*?/protocols/.*?/auth)$ != \/ ]]
++ wsgi_alias='/
^(/v3/OS-FEDERATION/identity_providers/.*?/protocols/.*?/auth)$/'
++ echo https://overcloud.example.com:35357/ '^(/v3/OS-FEDERATION/identity_providers/.*?/protocols/.*?/auth)$/'
+ check_url='https://overcloud.example.com:35357/ ^(/v3/OS-FEDERATION/identity_providers/.*?/protocols/.*?/auth)$/'
+ healthcheck_curl https://overcloud.example.com:35357/ '^(/v3/OS-FEDERATION/identity_providers/.*?/protocols/.*?/auth)$/'
+ '[' 2 == 0 ']'
+ export NSS_SDB_USE_CACHE=no
+ NSS_SDB_USE_CACHE=no
+ curl -g -k -q -s -S --fail -o /dev/null --max-time 10 --user-agent curl-healthcheck --write-out '\n%{http_code} %{remote_ip}:%{remote_port} %{time_total} seconds\n' https://overcloud.example.com:35357/ '^(/v3/OS-FEDERATION/identity_providers/.*?/protocols/.*?/auth)$/'

curl: (6) Could not resolve host: ^(
~~~

The issue is with /usr/share/openstack-tripleo-common/healthcheck/common.sh script in below function

~~~
# apachectl -S is slightly harder to parse and doesn't say if the vhost is serving SSL
get_url_from_vhost () {
    vhost_file=$1
    if test -n "${vhost_file}" && test -r "${vhost_file}" ; then
        server_name=$(awk '/ServerName/ {print $2}' $vhost_file)
        ssl_enabled=$(awk '/SSLEngine/ {print $2}' $vhost_file)
        bind_port=$(grep -h "<VirtualHost .*>" $vhost_file | sed 's/<VirtualHost .*:\(.*\)>/\1/')
        wsgi_alias=$(awk '/WSGIScriptAlias/ {print $2}' $vhost_file)                                   <<<<< 
        proto=http
        if [[ $ssl_enabled == "on" ]]; then
            proto=https
        fi
        if [[ $wsgi_alias != "/" ]]; then
            wsgi_alias="${wsgi_alias}/"
        fi
        echo ${proto}://${server_name}:${bind_port}${wsgi_alias}
    else
        exit 1
    fi
}
~~~

Awk is getting to matched instead of one 

~~~
[root@ctl01 conf.d]# awk '/WSGIScriptAlias/ {print $2}' 10-keystone_wsgi.conf
/
^(/v3/OS-FEDERATION/identity_providers/.*?/protocols/.*?/auth)$
~~~

In working(non federate) environment, we only get `/` as output.

~~~
[stack@undercloud-0 ~]$ awk '/WSGIScriptAlias/ {print $2}' /var/lib/config-data/puppet-generated/keystone/etc/httpd/conf.d/10-keystone_wsgi.conf 
/
~~~


Version-Release number of selected component (if applicable):
Red Hat Openstack release 16.1 Train

How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: