AIX

Procedure expects Apache 2.4.40+ installed via yum/dnf from Linux Tool box.
  • Install Apache if it is not already there 
    yum install httpd
  • Enable CGI-BIN API (it is hashed by default) in /opt/freeware/etc/httpd/conf/httpd.conf 
    <IfModule mpm_prefork_module>>
        LoadModule cgi_module /opt/freeware/lib/httpd/modules/mod_cgi.so
</IfModule>
  • Place there LPAR2RRD cfg (it supposes that install home will be in /home/lpar2rrd/lpar2rrd)
    Append it to /opt/freeware/etc/httpd/conf/httpd.conf 
    AddHandler cgi-script .cgi
#
# LPAR2RRD
#
Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www/"
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    AllowOverride AuthConfig FileInfo
    Options -Indexes
    Options FollowSymLinks
    AuthType basic
    AuthName "LPAR2RRD authorization"
    Require valid-user
</Directory>
# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride AuthConfig FileInfo
    SetHandler cgi-script
    Options ExecCGI FollowSymLinks
    AuthName "LPAR2RRD authorization"
    AuthType basic
    Require valid-user
</Directory>

KeepAlive On
KeepAliveTimeout 5
TimeOut 1200
  • Apache restart
    /opt/freeware/sbin/apachectl restart
  • Make sure apache starts after the OS boot

  • Enable authorization in LPAR2RRD after its installation 
    # su - lpar2rrd
umask 022
cd /home/lpar2rrd/lpar2rrd
cp html/.htaccess www
cp html/.htaccess lpar2rrd-cgi
  • Test web pages
    Point your web browser to http://<your lpar2rrd host>/lpar2rrd/ as soon as you configure LPAR2RRD


Red Hat, CentOS, Rocky Linux ...

  • Install Apache if it is not already there 
    yum install httpd
  • Append at the end of /etc/httpd/conf/httpd.conf following 
    Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www"
#
# LPAR2RRD
#
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    AllowOverride AuthConfig FileInfo
    Options -Indexes
    Options FollowSymLinks
    AuthType basic
    AuthName "LPAR2RRD authorization"
    Require valid-user
</Directory>

# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride AuthConfig FileInfo
    SetHandler cgi-script
    Options ExecCGI FollowSymLinks
    AuthType basic
    AuthName "LPAR2RRD authorization"
    Require valid-user
</Directory>

KeepAlive On
KeepAliveTimeout 5
TimeOut 1200
  • Edit /etc/httpd/conf.modules.d/00-mpm.conf, enable mpm_prefork_module, diasble mpm_event_module 
    LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
#LoadModule mpm_event_module modules/mod_mpm_event.so
  • Apache restart under root
    apachectl restart
  • Make sure apache starts after the OS boot 
    systemctl enable httpd.service
  • Enable authorization in LPAR2RRD after its installation 
    # su - lpar2rrd
umask 022
cd /home/lpar2rrd/lpar2rrd
cp html/.htaccess www
cp html/.htaccess lpar2rrd-cgi
  • Test web pages
    Point your web browser to http://<your lpar2rrd host>/lpar2rrd/ as soon as you configure LPAR2RRD

  • If you have firewall enabled then enable LPAR2RRD communication by: 
    firewall-cmd --add-service=http --permanent
firewall-cmd --add-service=https --permanent
firewall-cmd --add-port=8162/tcp --permanent

firewall-cmd --reload
  • You might need to disable SElinux
    You must do it in case you get either "(13)Permission denied:" or "AH00132: file permissions deny server access" in Apache error_log.
    You have 2 options:
    • Disable SELinux only for Apache 
      Step 1. Query for the Boolean value you need to change:
# getsebool -a | grep httpd_dis
  httpd_disable_trans --> off

Step 2. Disable the SELinux protection:
# setsebool -P httpd_disable_trans=1

Step 3. Verify that the Boolean has changed:
# getsebool -a | grep httpd_dis
  httpd_disable_trans --> on
    • Globally disable SELinux 
      # setenforce Permissive
# vi /etc/sysconfig/selinux
  SELINUX=disabled
    Follow SELinux configuration in case you want to enable SELinux only for LPAR2RRD

Debian, Ubuntu ...

  • Install Apache if it is nit already there 
    # apt-get install httpd
  • Enable CGI-BIN and optionally even SSL if it is required 
    # a2enmod cgi
# a2enmod ssl
  • Append this at the end of /etc/apache2/apache2.conf 
    AddHandler cgi-script .sh
#
# LPAR2RRD
#
Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www/"
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    AllowOverride AuthConfig FileInfo
    Options -Indexes
    Options FollowSymLinks
    AuthType basic
    AuthName "LPAR2RRD authorization"
    Require valid-user
</Directory>
# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride AuthConfig FileInfo
    SetHandler cgi-script
    Options ExecCGI FollowSymLinks
    AuthType basic
    AuthName "LPAR2RRD authorization"
    Require valid-user
</Directory>

KeepAlive On
KeepAliveTimeout 5
TimeOut 1200
  • Apache restart
    apachectl restart
  • Make sure apache starts after the OS boot 
    systemctl start apache2.service
  • Enable authorization in LPAR2RRD after its installation 
    # su - lpar2rrd
umask 022
cd /home/lpar2rrd/lpar2rrd
cp html/.htaccess www
cp html/.htaccess lpar2rrd-cgi
  • Test web pages
    Point your web browser to http://<your lpar2rrd host>/lpar2rrd/ as soon as you configure LPAR2RRD

  • If you have firewall enabled then enable LPAR2RRD communication by: 
    firewall-cmd --add-service=http --permanent
firewall-cmd --add-service=https --permanent
firewall-cmd --add-port=8162/tcp --permanent

firewall-cmd --reload
  • You might need to disable SElinux
    You must do it in case you get either "(13)Permission denied:" or "AH00132: file permissions deny server access" in Apache error_log.
    You have 2 options:
    • Disable SELinux only for Apache 
      Step 1. Query for the Boolean value you need to change:
# getsebool -a | grep httpd_dis
  httpd_disable_trans --> off

Step 2. Disable the SELinux protection:
# setsebool -P httpd_disable_trans=1

Step 3. Verify that the Boolean has changed:
# getsebool -a | grep httpd_dis
  httpd_disable_trans --> on
    • Globally disable SELinux 
      # setenforce Permissive
# vi /etc/sysconfig/selinux
  SELINUX=disabled
    Follow SELinux configuration in case you want to enable SELinux only for LPAR2RRD

SuSE

  • Append at the end of /etc/apache2/httpd.conf following 
    AddHandler cgi-script .sh
#
# LPAR2RRD
#
Alias /lpar2rrd  "/home/lpar2rrd/lpar2rrd/www/"
<Directory "/home/lpar2rrd/lpar2rrd/www/">
    AllowOverride AuthConfig FileInfo
    Options -Indexes
    Options FollowSymLinks
    AuthType basic
    AuthName "LPAR2RRD authorization"
    Require valid-user
</Directory>
# CGI-BIN
ScriptAlias /lpar2rrd-cgi/ "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi/"
<Directory "/home/lpar2rrd/lpar2rrd/lpar2rrd-cgi">
    AllowOverride AuthConfig FileInfo
    SetHandler cgi-script
    Options ExecCGI FollowSymLinks
    AuthType basic
    AuthName "LPAR2RRD authorization"
    Require valid-user
</Directory>

KeepAlive On
KeepAliveTimeout 5
TimeOut 1200
  • Make sure apache starts after the OS boot

  • Enable authorization in LPAR2RRD after its installation 
    # su - lpar2rrd
umask 022
cd /home/lpar2rrd/lpar2rrd
cp html/.htaccess www
cp html/.htaccess lpar2rrd-cgi
  • Test web pages
    Point your web browser to http://<your lpar2rrd host>/lpar2rrd/ as soon as you configure LPAR2RRD


  • If you have firewall enabled then enable LPAR2RRD communication by: 
    firewall-cmd --add-service=http --permanent
firewall-cmd --add-service=https --permanent
firewall-cmd --add-port=8162/tcp --permanent

firewall-cmd --reload

Troubleshooting

Apache error_log

When LPAR2RRD application is not reachable via the web server, check Apache error log for new errors under root user
  • AIX
    cd /opt/freeware/etc/httpd/logs
tail error_log
  • Linux:
    cd /etc/httpd/logs/
tail error_log
  • "(13)Permission denied:" or "AH00132: file permissions deny server access"
    Solution:
    Problem either with SELinux (check above per OS settings) or Apache user does not have read access to LPAR2RRD web /home/lpar2rrd/lpar2rrd/www
    Make sure that all subdirectories in the path are readable for apache user (ps -ef| egrep "httpd|apache")

  • AH01257: unable to connect to cgi daemon after multiple tries
    AH01630: client denied by server configuration
    Solution:
    Enable mpm_prefork_module and disable mpm_event_module in /etc/httpd/conf.modules.d/00-mpm.conf 
    LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
#LoadModule mpm_event_module modules/mod_mpm_event.so
  • AH01220: Timeout waiting for output from CGI script
    Solution:
    Apache default timeout is 1 minute what might not be enhough for longer reports, increase it by adding this at the end of httpd.conf 
    KeepAlive On
KeepAliveTimeout 5
TimeOut 1200

Apache access_log (ssl_error_log)

Check also access_log or ssl_error_log if there are new entries when you try to reach the web via the browser, if do not then either:
  • Apache is not running, no any process is listed 
    ps -ef| egrep "httpd|apache"| grep -v grep
  • Firewall on the LPAR2RRD host blocking it, disable it
    firewall-cmd --add-service=http --permanent
firewall-cmd --add-service=https --permanent
firewall-cmd --add-port=8162/tcp --permanent

firewall-cmd --reload
  • Company's network/firewall blocking it, check with your security team