add support for dockerization

This commit adds a buildable Dockerfile based on the httpd apache2
docker image with sa_cache cron support built in.
It also comes with a docker-compose example file.

docker/Dockerfile

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+FROM httpd
+
+RUN apt-get update -yqq && apt-get install -y \
+  build-essential \
+  cron \
+  git \
+  perl \
+  supervisor \
+  procps \
+  libcgi-session-perl \
+  && apt-get clean
+
+RUN git clone https://github.com/darold/sendmailanalyzer.git /tmp/sendmailanalyzer
+
+WORKDIR /tmp/sendmailanalyzer
+
+RUN perl Makefile.PL && make && make install && rm -rf /tmp/sendmailanalyzer
+
+WORKDIR /usr/local/sendmailanalyzer
+
+COPY supervisord.conf /etc/supervisor/supervisord.conf
+
+COPY httpd.conf /usr/local/apache2/conf/httpd.conf
+
+COPY sa_cache.sh /etc/cron.daily/sa_cache.sh
+
+RUN mkdir -p /var/www/htdocs
+
+CMD ["supervisord", "-c", "/etc/supervisor/supervisord.conf"]
+

docker/docker-compose.yml.example

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+version: '2'
+services:
+  sma:
+    restart: always
+    build: .
+    expose: 
+      - 80
+    volumes:
+      - /path/to/mail.log:/var/log/mail.log:ro
+      - /path/to/data:/usr/local/sendmailanalyzer/data
+      - /path/to/sendmailanalyzer.conf:/usr/local/sendmailanalyzer/sendmailanalyzer.conf

docker/httpd.conf

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+LoadModule mpm_event_module modules/mod_mpm_event.so
+LoadModule authnz_fcgi_module modules/mod_authnz_fcgi.so
+LoadModule access_compat_module modules/mod_access_compat.so
+LoadModule auth_basic_module modules/mod_auth_basic.so
+LoadModule authz_core_module modules/mod_authz_core.so
+LoadModule authz_host_module modules/mod_authz_host.so
+LoadModule reqtimeout_module modules/mod_reqtimeout.so
+LoadModule filter_module modules/mod_filter.so
+LoadModule mime_module modules/mod_mime.so
+LoadModule log_config_module modules/mod_log_config.so
+LoadModule env_module modules/mod_env.so
+LoadModule headers_module modules/mod_headers.so
+LoadModule setenvif_module modules/mod_setenvif.so
+LoadModule version_module modules/mod_version.so
+LoadModule unixd_module modules/mod_unixd.so
+LoadModule status_module modules/mod_status.so
+LoadModule autoindex_module modules/mod_autoindex.so
+LoadModule cgid_module modules/mod_cgid.so
+LoadModule dir_module modules/mod_dir.so
+LoadModule alias_module modules/mod_alias.so
+
+<IfModule unixd_module>
+#
+# 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 www-data
+Group www-data
+
+</IfModule>
+
+ServerAdmin admin@domain.com
+Listen 80
+
+
+# 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>
+
+# 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 "/usr/local/sendmailanalyzer/www"
+<Directory "/usr/local/sendmailanalyzer/www">
+    #
+    # 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 Includes
+
+    #
+    # AllowOverride controls what directives may be placed in .htaccess files.
+    # It can be "All", "None", or any combination of the keywords:
+    #   AllowOverride FileInfo AuthConfig Limit
+    #
+    #AllowOverride None
+
+    Options ExecCGI
+    AddHandler cgi-script .cgi
+    DirectoryIndex sa_report.cgi
+    Require all granted
+</Directory>
+
+#
+# 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 /proc/self/fd/2
+
+#
+# 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 /proc/self/fd/1 common
+
+    #
+    # If you prefer a logfile with access, agent, and referer information
+    # (Combined Logfile Format) you can use the following directive.
+    #
+    #CustomLog "logs/access_log" combined
+</IfModule>
+
+<IfModule headers_module>
+    #
+    # Avoid passing HTTP_PROXY environment to CGI's on this or any proxied
+    # backend servers which have lingering "httpoxy" defects.
+    # 'Proxy' request header is undefined by the IETF, not listed by IANA
+    #
+    RequestHeader unset Proxy early
+</IfModule>
+
+<IfModule mime_module>
+    #
+    # TypesConfig points to the file containing the list of mappings from
+    # filename extension to MIME-type.
+    #
+    TypesConfig conf/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>

docker/sa_cache.sh

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+#!/bin/bash
+
+/usr/local/sendmailanalyzer/sa_cache > /dev/null 2>&1
+/usr/bin/pkill -HUP sendmailanalyzer

docker/supervisord.conf

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+; supervisor config file
+
+;[unix_http_server]
+;file=/dev/shm/supervisor.sock    ; (the path to the socket file)
+;chmod=0700                       ; sockef file mode (default 0700)
+
+[supervisord]
+logfile=/var/log/supervisor/supervisord.log ; (main log file;default $CWD/supervisord.log)
+pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
+childlogdir=/var/log/supervisor            ; ('AUTO' child log dir, default $TEMP)
+
+; the below section must remain in the config file for RPC
+; (supervisorctl/web interface) to work, additional interfaces may be
+; added by defining them in separate rpcinterface: sections
+[rpcinterface:supervisor]
+supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
+
+[supervisorctl]
+serverurl=unix:///dev/shm/supervisor.sock ; use a unix:// URL  for a unix socket
+
+; The [include] section can just contain the "files" setting.  This
+; setting can list multiple files (separated by whitespace or
+; newlines).  It can also contain wildcards.  The filenames are
+; interpreted as relative to this file.  Included files *cannot*
+; include files themselves.
+
+
+[supervisord]
+nodaemon=true
+
+[program:sendmailanalyzer]
+startsecs=0
+autostart=true
+autorestart=false
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+command=/usr/local/sendmailanalyzer/sendmailanalyzer
+
+[program:apache2]
+command=apachectl -D "FOREGROUND" -k start
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+
+[program:cron]
+startsecs=0
+autostart=true
+autorestart=true
+stdout_logfile=/var/log/supervisor/%(program_name)s.log
+stderr_logfile=/var/log/supervisor/%(program_name)s.log
+command=/usr/sbin/cron -f
+