LinuxQuestions.org - [SOLVED] Creating multiple Apache instances on CentOS 7 SystemD

I am trying to create a duplicate httpd service in systemd on CentOS 7 (why? see bottom)

This is what I have done so far:

Code:

#Copy all the files

cp -pr /etc/httpd /etc/httpd-bobby

cp /usr/lib/systemd/system/httpd.service /usr/lib/systemd/system/httpd-bobby.service

cp /etc/sysconfig/httpd /etc/sysconfig/httpd-bobby



#Just replace /etc/sysconfig/httpd with /etc/sysconfig/httpd-bobby

pico /usr/lib/systemd/system/httpd-bobby.service



#Changed port and file locations

pico /etc/httpd-bobby/conf/httpd.conf

When I run it, I get a failure, and this:

Code:

[root~]# systemctl status httpd-bobby.service

httpd-bobby.service - The Apache HTTP Server

  Loaded: loaded (/usr/lib/systemd/system/httpd-bobby.service; disabled)

  Active: failed (Result: exit-code) since Tue 2016-06-21 17:38:33 BST; 6h ago

    Docs: man:httpd(8)

          man:apachectl(8)

  Process: 21777 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE)

  Process: 21775 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=0/SUCCESS)

 Main PID: 21775 (code=exited, status=0/SUCCESS)

  CGroup: /system.slice/httpd-bobby.service



Jun 21 17:38:33 MyServer httpd[21775]: httpd (pid 21556) already running

Jun 21 17:38:33 MyServer kill[21777]: kill: cannot find process ""

Jun 21 17:38:33 MyServer systemd[1]: httpd-bobby.service: control process exited, code=exited status=1

Jun 21 17:38:33 MyServer systemd[1]: Failed to start The Apache HTTP Server.

Jun 21 17:38:33 MyServer systemd[1]: Unit httpd-bobby.service entered failed state.

It looks very much like it is using the same pid file as the httpd service. I have tried adding pid location to both the httpd.conf and the service file, but I still get this error.

Here are the files involved:

Code:

[root~]# cat /usr/lib/systemd/system/httpd-bobby.service

[Unit]

Description=The Apache HTTP Server

After=network.target remote-fs.target nss-lookup.target

Documentation=man:httpd(8)

Documentation=man:apachectl(8)



[Service]

Type=notify

PIDFile=/etc/httpd-bobby/httpd-bobby.pid

EnvironmentFile=/etc/sysconfig/httpd-bobby

ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND

ExecReload=/usr/sbin/httpd $OPTIONS -k graceful

ExecStop=/bin/kill -WINCH ${MAINPID}

# We want systemd to give httpd some time to finish gracefully, but still want

# it to kill httpd after TimeoutStopSec if something went wrong during the

# graceful stop. Normally, Systemd sends SIGTERM signal right after the

# ExecStop, which would kill httpd. We are sending useless SIGCONT here to give

# httpd time to finish.

KillSignal=SIGCONT

PrivateTmp=true



[Install]

WantedBy=multi-user.target



[root~]# cat /etc/httpd-bobby/conf/httpd.conf

#

# This is the main Apache HTTP server configuration file.  It contains the

# configuration directives that give the server its instructions.

# See <URL:http://httpd.apache.org/docs/2.4/> for detailed information.

# In particular, see 

# <URL:http://httpd.apache.org/docs/2.4/mod/directives.html>

# for a discussion of each configuration directive.

#

# Do NOT simply read the instructions in here without understanding

# what they do.  They're here only as hints or reminders.  If you are unsure

# consult the online docs. You have been warned.  

#

# Configuration and logfile names: If the filenames you specify for many

# of the server's control files begin with "/" (or "drive:/" for Win32), the

# server will use that explicit path.  If the filenames do *not* begin

# with "/", the value of ServerRoot is prepended -- so 'log/access_log'

# with ServerRoot set to '/www' will be interpreted by the

# server as '/www/log/access_log', where as '/log/access_log' will be

# interpreted as '/log/access_log'.



#

# ServerRoot: The top of the directory tree under which the server's

# configuration, error, and log files are kept.

#

# Do not add a slash at the end of the directory path.  If you point

# ServerRoot at a non-local disk, be sure to specify a local disk on the

# Mutex directive, if file-based mutexes are used.  If you wish to share the

# same ServerRoot for multiple httpd daemons, you will need to change at

# least PidFile.

#

ServerRoot "/etc/httpd-bobby"



PidFile /etc/httpd-bobby/httpd-bobby.pid



#

# Listen: Allows you to bind Apache to specific IP addresses and/or

# ports, instead of the default. See also the <VirtualHost>

# directive.

#

# Change this to Listen on specific IP addresses as shown below to 

# prevent Apache from glomming onto all bound IP addresses.

#

#Listen 12.34.56.78:80

Listen *:12345



#

# Dynamic Shared Object (DSO) Support

#

# To be able to use the functionality of a module which was built as a DSO you

# have to place corresponding `LoadModule' lines at this location so the

# directives contained in it are actually available _before_ they are used.

# Statically compiled modules (those listed by `httpd -l') do not need

# to be loaded here.

#

# Example:

# LoadModule foo_module modules/mod_foo.so

#

Include conf.modules.d/*.conf



#

# If you wish httpd to run as a different user or group, you must run

# httpd as root initially and it will switch.  

#

# User/Group: The name (or #number) of the user/group to run httpd as.

# It is usually good practice to create a dedicated user and group for

# running httpd, as with most system services.

#

User bobby

Group www



# 'Main' server configuration

#

# The directives in this section set up the values used by the 'main'

# server, which responds to any requests that aren't handled by a

# <VirtualHost> definition.  These values also provide defaults for

# any <VirtualHost> containers you may define later in the file.

#

# All of these directives may appear inside <VirtualHost> containers,

# in which case these default settings will be overridden for the

# virtual host being defined.

#



#

# ServerAdmin: Your address, where problems with the server should be

# e-mailed.  This address appears on some server-generated pages, such

# as error documents.  e.g. admin@your-domain.com

#

ServerAdmin admin@localhost



#

# ServerName gives the name and port that the server uses to identify itself.

# This can often be determined automatically, but we recommend you specify

# it explicitly to prevent problems during startup.

#

# If your host doesn't have a registered DNS name, enter its IP address here.

#

ServerName www.bobbysite.com:12345



#

# Deny access to the entirety of your server's filesystem. You must

# explicitly permit access to web content directories in other 

# <Directory> blocks below.

#

<Directory />

    AllowOverride none

    Require all denied

</Directory>



#

# Note that from this point forward you must specifically allow

# particular features to be enabled - so if something's not working as

# you might expect, make sure that you have specifically enabled it

# below.

#



#

# DocumentRoot: The directory out of which you will serve your

# documents. By default, all requests are taken from this directory, but

# symbolic links and aliases may be used to point to other locations.

#

DocumentRoot "/export/home/bobby/apache/bobbysite.com/httpd/htdocs"



#

# Relax access to content within DocumentRoot.

#

<Directory "/export/home/bobby/apache/bobbysite.com/httpd/htdocs">

    AllowOverride None

    # Allow open access:

    Require all granted

</Directory>



# Further relax access to the default document root:

<Directory "/export/home/bobby/apache/bobbysite.com/httpd/htdocs">

    #

    # Possible values for the Options directive are "None", "All",

    # or any combination of:

    #  Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews

    #

    # Note that "MultiViews" must be named *explicitly* --- "Options All"

    # doesn't give it to you.

    #

    # The Options directive is both complicated and important.  Please see

    # http://httpd.apache.org/docs/2.4/mod/core.html#options

    # for more information.

    #

    Options Indexes FollowSymLinks



    #

    # AllowOverride controls what directives may be placed in .htaccess files.

    # It can be "All", "None", or any combination of the keywords:

    #  Options FileInfo AuthConfig Limit

    #

    AllowOverride None



    #

    # Controls who can get stuff from this server.

    #

    Require all granted

</Directory>



#

# DirectoryIndex: sets the file that Apache will serve if a directory

# is requested.

#

<IfModule dir_module>

    DirectoryIndex index.html

</IfModule>



#

# The following lines prevent .htaccess and .htpasswd files from being 

# viewed by Web clients. 

#

<Files ".ht*">

    Require all denied

</Files>



#

# ErrorLog: The location of the error log file.

# If you do not specify an ErrorLog directive within a <VirtualHost>

# container, error messages relating to that virtual host will be

# logged here.  If you *do* define an error logfile for a <VirtualHost>

# container, that host's errors will be logged there and not here.

#

ErrorLog "logs/2-4_error_log"



#

# LogLevel: Control the number of messages logged to the error_log.

# Possible values include: debug, info, notice, warn, error, crit,

# alert, emerg.

#

LogLevel warn



<IfModule log_config_module>

    #

    # The following directives define some format nicknames for use with

    # a CustomLog directive (see below).

    #

    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined

    LogFormat "%h %l %u %t \"%r\" %>s %b" common



    <IfModule logio_module>

      # You need to enable mod_logio.c to use %I and %O

      LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio

    </IfModule>



    #

    # The location and format of the access logfile (Common Logfile Format).

    # If you do not define any access logfiles within a <VirtualHost>

    # container, they will be logged here.  Contrariwise, if you *do*

    # define per-<VirtualHost> access logfiles, transactions will be

    # logged therein and *not* in this file.

    #

    #CustomLog "logs/2-4_access_log" common



    #

    # If you prefer a logfile with access, agent, and referer information

    # (Combined Logfile Format) you can use the following directive.

    #

    CustomLog "logs/2-4_access_log" combined

</IfModule>



<IfModule alias_module>

    #

    # Redirect: Allows you to tell clients about documents that used to 

    # exist in your server's namespace, but do not anymore. The client 

    # will make a new request for the document at its new location.

    # Example:

    # Redirect permanent /foo http://www.example.com/bar



    #

    # Alias: Maps web paths into filesystem paths and is used to

    # access content that does not live under the DocumentRoot.

    # Example:

    # Alias /webpath /full/filesystem/path

    #

    # If you include a trailing / on /webpath then the server will

    # require it to be present in the URL.  You will also likely

    # need to provide a <Directory> section to allow access to

    # the filesystem path.



    #

    # ScriptAlias: This controls which directories contain server scripts. 

    # ScriptAliases are essentially the same as Aliases, except that

    # documents in the target directory are treated as applications and

    # run by the server when requested rather than as documents sent to the

    # client.  The same rules about trailing "/" apply to ScriptAlias

    # directives as to Alias.

    #

    ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"



</IfModule>



#

# "/var/www/cgi-bin" should be changed to whatever your ScriptAliased

# CGI directory exists, if you have that configured.

#

<Directory "/var/www/cgi-bin">

    AllowOverride None

    Options None

    Require all granted

</Directory>



<IfModule mime_module>

    #

    # TypesConfig points to the file containing the list of mappings from

    # filename extension to MIME-type.

    #

    TypesConfig /etc/mime.types



    #

    # AddType allows you to add to or override the MIME configuration

    # file specified in TypesConfig for specific file types.

    #

    #AddType application/x-gzip .tgz

    #

    # AddEncoding allows you to have certain browsers uncompress

    # information on the fly. Note: Not all browsers support this.

    #

    #AddEncoding x-compress .Z

    #AddEncoding x-gzip .gz .tgz

    #

    # If the AddEncoding directives above are commented-out, then you

    # probably should define those extensions to indicate media types:

    #

    AddType application/x-compress .Z

    AddType application/x-gzip .gz .tgz



    #

    # AddHandler allows you to map certain file extensions to "handlers":

    # actions unrelated to filetype. These can be either built into the server

    # or added with the Action directive (see below)

    #

    # To use CGI scripts outside of ScriptAliased directories:

    # (You will also need to add "ExecCGI" to the "Options" directive.)

    #

    #AddHandler cgi-script .cgi



    # For type maps (negotiated resources):

    #AddHandler type-map var



    #

    # Filters allow you to process content before it is sent to the client.

    #

    # To parse .shtml files for server-side includes (SSI):

    # (You will also need to add "Includes" to the "Options" directive.)

    #

    AddType text/html .shtml

    AddOutputFilter INCLUDES .shtml

</IfModule>



#

# Specify a default charset for all content served; this enables

# interpretation of all content as UTF-8 by default.  To use the 

# default browser choice (ISO-8859-1), or to allow the META tags

# in HTML content to override this choice, comment out this

# directive:

#

AddDefaultCharset UTF-8



<IfModule mime_magic_module>

    #

    # The mod_mime_magic module allows the server to use various hints from the

    # contents of the file itself to determine its type.  The MIMEMagicFile

    # directive tells the module where the hint definitions are located.

    #

    MIMEMagicFile conf/magic

</IfModule>



#

# Customizable error responses come in three flavors:

# 1) plain text 2) local redirects 3) external redirects

#

# Some examples:

#ErrorDocument 500 "The server made a boo boo."

#ErrorDocument 404 /missing.html

#ErrorDocument 404 "/cgi-bin/missing_handler.pl"

#ErrorDocument 402 http://www.example.com/subscription_info.html

#



#

# EnableMMAP and EnableSendfile: On systems that support it, 

# memory-mapping or the sendfile syscall may be used to deliver

# files.  This usually improves server performance, but must

# be turned off when serving from networked-mounted 

# filesystems or if support for these functions is otherwise

# broken on your system.

# Defaults if commented: EnableMMAP On, EnableSendfile Off

#

#EnableMMAP off

EnableSendfile on



# Supplemental configuration

#

# Load config files in the "/etc/httpd/conf.d" directory, if any.

#IncludeOptional conf.d/*.conf

"Why don't you just use virtualhosts? Why are you asking this question? etc"
This question is not superfluous. mod_perl global variables are persistent throughout Apache processes. If you wish to run multiple sites with different mod_perl global variables, you need separate Apache instances.