ommongodb: MongoDB Output Module
Module Name: | ommongodb |
Author: |
Purpose
This module provides native support for logging to MongoDB.
Configuration Parameters
Note
Parameter names are case-insensitive.
Action Parameters
UriStr
type | default | mandatory |
|
|---|---|---|---|
word | none | no | none |
MongoDB connexion string, as defined by the MongoDB String URI Format (See: https://docs.mongodb.com/manual/reference/connection-string/). If uristr is defined, following directives will be ignored: server, serverport, uid, pwd.
SSL_Cert
type | default | mandatory |
|
|---|---|---|---|
word | none | no | none |
Absolute path to the X509 certificate you want to use for TLS client authentication. This is optional.
SSL_Ca
type | default | mandatory |
|
|---|---|---|---|
word | none | no | none |
Absolute path to the trusted X509 CA certificate that signed the mongoDB server certificate. This is optional.
db
type | default | mandatory |
|
|---|---|---|---|
word | syslog | no | none |
Database to use.
Collection
type | default | mandatory |
|
|---|---|---|---|
word | log | no | none |
Collection to use.
Allowed_Error_Codes
type | default | mandatory |
|
|---|---|---|---|
array | no | no | none |
The list of error codes returned by MongoDB you want ommongodb to ignore. Please use the following format: allowed_error_codes=[“11000”,”47”].
Template
type | default | mandatory |
|
|---|---|---|---|
word | OMSR_TPL_AS_MSG | no | none |
Template to use when submitting messages.
Note rsyslog contains a canned default template to write to the MongoDB. It will be used automatically if no other template is specified to be used. This template is:
template(name="BSON" type="string" string="\\"sys\\" : \\"%hostname%\\",
\\"time\\" : \\"%timereported:::rfc3339%\\", \\"time\_rcvd\\" :
\\"%timegenerated:::rfc3339%\\", \\"msg\\" : \\"%msg%\\",
\\"syslog\_fac\\" : \\"%syslogfacility%\\", \\"syslog\_server\\" :
\\"%syslogseverity%\\", \\"syslog\_tag\\" : \\"%syslogtag%\\",
\\"procid\\" : \\"%programname%\\", \\"pid\\" : \\"%procid%\\",
\\"level\\" : \\"%syslogpriority-text%\\"")
This creates the BSON document needed for MongoDB if no template is specified. The default schema is aligned to CEE and project lumberjack. As such, the field names are standard lumberjack field names, and not rsyslog property names. When specifying templates, be sure to use rsyslog property names as given in the table. If you would like to use lumberjack-based field names inside MongoDB (which probably is useful depending on the use case), you need to select fields names based on the lumberjack schema. If you just want to use a subset of the fields, but with lumberjack names, you can look up the mapping in the default template. For example, the lumberjack field “level” contains the rsyslog property “syslogpriority-text”.
Examples
Write to Database
The following sample writes all syslog messages to the database “syslog” and into the collection “log” on mongoserver.example.com. The server is being accessed under the account of “user” with password “pwd”. Please note that this syntax is deprecated by the “uristr” directive, as shown below.
module(load="ommongodb")
action(type="ommongodb"
server="mongoserver.example.com" db="syslog" collection="log"
uid="user" pwd="pwd")
Write to mongoDB server with TLS and client authentication
Another sample that uses the new “uristr” directives to connect to a TLS mongoDB server with TLS and client authentication.
module(load="ommongodb")
action(type="ommongodb"
uristr="mongodb://vulture:9091,vulture2:9091/?replicaset=Vulture&ssl=true"
ssl_cert="/var/db/mongodb/mongod.pem"
ssl_ca="/var/db/mongodb/ca.pem"
db="logs" collection="syslog")
Deprecated Parameters
Note
While these parameters are still accepted, they should no longer be used for newly created configurations.
Action Parameters
Server
type | default | mandatory |
|
|---|---|---|---|
word | 127.0.0.1 | no | none |
Name or address of the MongoDB server.
ServerPorted
type | default | mandatory |
|
|---|---|---|---|
word | 27017 | no | none |
Permits to select a non-standard port for the MongoDB server. The default is 0, which means the system default port is used. There is no need to specify this parameter unless you know the server is running on a non-standard listen port.
UID
type | default | mandatory |
|
|---|---|---|---|
word | none | no | none |
Logon userid used to connect to server. Must have proper permissions.
PWD
type | default | mandatory |
|
|---|---|---|---|
word | none | no | none |
The user’s password.
See also
Help with configuring/using Rsyslog:
Mailing list - best route for general questions
GitHub: rsyslog source project - detailed questions, reporting issues that are believed to be bugs with
Rsyslog
See also
Contributing to Rsyslog:
Source project: rsyslog project README.
Documentation: rsyslog-doc project README
Copyright 2008-2023 Rainer Gerhards (Großrinderfeld), and Others.