Seon Core main configuration file
Contents
Main configuration file
Seon's main configuration file defines be basic information about database connectivity and some other, really basic information which cannot reside in the database.
Position
All Seon binaries search the configuration file at
/etc/seon.conf
but they are all aware of searching this file at a given position. For this position information, nearly all binaries have the parameter "-C" (beware of the uppercase!). Example:
$ /opt/seon/bin/seonrd -C /opt/seon/seon.conf
This example searches the config file at the given position "/opt/seon/seon.conf".
In addition, all running Seon binaries set the environment variable "Seon_CFGFILE", which is also interpreted by all binaries. An alternative way to the above example could then be:
$ export Seon_CFGFILE=/opt/seon/seon.conf $ /opt/seon/bin/seonrd
Content
The configuration file contains textual information in the format "key=value", where no space must be existant between key, the character "=" and the corresponding value. Lines beginning with a hash sign ("#") are comments and will not be taken into account. Example:
# comment KEY=VALUE
Variables
Illegal defintions are:
KEY = VALUE <- whitespaces after key name and before value KEY =VALUE <- whitespace after key name KEY= VALUE <- whitespace before value
The following variables are available.
DB_HOST
Mandatory.
Resolvable hostname or IP address of the databse server. In case of MySQL, special rules apply: if the value "localhost" is used, the MySQL client library tries to connect via a compiled in socket connection, if no socket is configured. In this case, if you have any problems connecting to MySQL, examine your syslog output and check the socket availability. As a workaround, "127.0.0.1" can be configured for a forced TCP/IP connection to localhost.
DB_USER
Mandatory.
Username for the database connection. In case of MySQL, if no username is configured (left empty), the user running the program is being used.
DB_PASS
Mandatory.
Password for the database connection. Empty connection passwords are not officially supported, but may work.
DB_NAME
Mandatory.
- MySQL: Name of the database.
- DB2: Name of the database instance.
DB_SOCKET
Optional. Absolute path to the socket file for communication. Only valid for MySQL.
DB_PORT
Mandatory.
TCP/IP port number for communication with the database server.
TABLEPREFIX
Mandatory.
Prefix of all Seon tables. In shared database environment (where only one database is available) it's handy to have a configurable prefix for all tables. Default:
seon_
(beware of the underscore as a last character).
MYSQLCLIENT
Optional.
Absolute path to the MySQL client tool used for backup and restore reasons.
SERVERID
Optional.
ID of the Seon server in a cluster environment. Every Seon server should have its own server ID, given by you.
DBTYPE
Optional.
Type of database connected to. Starting with Seon 3 Core, possible values are:
- MYSQL
- DB2
- SQLITE
If left empty, "MYSQL" is assumed for compatibility reasons with Seon 2 Core.
DB_PERSISTANT_CONNECTION
Optional.
For a persistant database connection for every Seon process, you may set this configuration value to the numerical value "1":
DB_PERSISTANT_CONNECTION=1
At the moment only effective with "DBTYPE=DB2".
CLIENTD_OVERRIDDEN_HOST
If you want Seon Webaccess to connect to an alternative Seon client daemon (possibly on a remote server), set here the resolvable hostname or IP address of the server. All Seon client daemon communication (i.e. authentification, job generation) will take place on this server.
WEBACCESS_UPLOAD_DIRECTORY
If you want a special upload directory used for this Seon Webaccess instance, you can configure it here.
This feature is mainly used when installing Seon Webaccess on a remote server (i.e. remote co-location). The same directory name must exist on the host running the Seon client daemon for job generation. In most common cases, this is done by mounting the same directory with the exact name from the remote server on the host running the Seon client daemon.
Examples
The following examples show various settings: locale and remote databases, socket connects, the possible database types and persistant connections.
local MySQL server via socket
DB_HOST=localhost DB_USER=seon DB_PASS=seon DB_NAME=seon DB_SOCKET=/var/lib/mysql.sock DB_PORT=3306 TABLEPREFIX=seon_ MYSQLCLIENT=/usr/local/mysql/bin/mysql
remote MySQL server and remote Seon client daemon, using a different upload directory
DB_HOST=192.168.1.23 DB_USER=seon DB_PASS=seon DB_NAME=seon DB_PORT=3306 TABLEPREFIX=seon_ MYSQLCLIENT=/usr/local/mysql/bin/mysql CLIENTD_OVERRIDDEN_HOST=192.168.21.2 WEBACCESS_UPLOAD_DIRECTORY=/opt/seon/upload_remote_location
remote DB2
DB_HOST=db2 DB_USER=db2inst1 DB_PASS=db2 DB_NAME=swan_hl DB_PORT=50000 TABLEPREFIX=seon_ DBTYPE=DB2
remote DB2 with persistant connections and configured server ID
DB_HOST=db2 DB_USER=db2inst1 DB_PASS=db2 DB_NAME=swan_hl DB_PORT=50000 TABLEPREFIX=seon_ DBTYPE=DB2 DB_PERSISTANT_CONNECTION=1 SERVERID=5
