python daemon that munches on logs and sends their contents to logstash
- Python 2.6+
- Optional zeromq support: install libzmq (
brew install zmqorapt-get install libzmq-dev) and pyzmq (pip install pyzmq==2.1.11)
Using PIP:
From Github:
pip install git+git:https://github.com/josegonzalez/beaver.git#egg=beaver
From PyPI:
pip install beaver==29
usage:
beaver [-h] [-c CONFIG] [-d] [-D] [-f FILES [FILES ...]]
[-F {json,msgpack,raw,rawjson,string}] [-H HOSTNAME] [-m {bind,connect}]
[-l OUTPUT] [-p PATH] [-P PID]
[-t {mqtt,rabbitmq,redis,sqs,stdout,tcp,udp,zmq}] [-v] [--fqdn]
optional arguments:
-h, --help show this help message and exit
-c CONFIG, --configfile CONFIG
ini config file path
-d, --debug enable debug mode
-D, --daemonize daemonize in the background
-f FILES [FILES ...], --files FILES [FILES ...]
space-separated filelist to watch, can include globs
(*.log). Overrides --path argument
-F {json,msgpack,raw,rawjson,string}, --format {json,msgpack,raw,rawjson,string}
format to use when sending to transport
-H HOSTNAME, --hostname HOSTNAME
manual hostname override for source_host
-m {bind,connect}, --mode {bind,connect}
bind or connect mode
-l OUTPUT, --logfile OUTPUT, -o OUTPUT, --output OUTPUT
file to pipe output to (in addition to stdout)
-p PATH, --path PATH path to log files
-P PID, --pid PID path to pid file
-t {mqtt,rabbitmq,redis,stdout,tcp,udp,zmq}, --transport {mqtt,rabbitmq,redis,sqs,stdout,tcp,udp,zmq}
log transport method
-v, --version output version and quit
--fqdn use the machine's FQDN for source_host
Beaver provides an lightweight method for shipping local log files to Logstash. It does this using redis, zeromq, tcp, udp, rabbit or stdout as the transport. This means you'll need a redis, zeromq, tcp, udp, amqp or stdin input somewhere down the road to get the events.
Events are sent in logstash's json_event format. Options can also be set as environment variables.
NOTE: the redis transport uses a namespace of logstash:beaver by default. You will need to update your logstash indexer to match this, or you may configure beaver to do otherwise.
Beaver can optionally get data from a configfile using the -c flag. This file is in ini format. Global configuration will be under the beaver stanza. The following are global beaver configuration keys with their respective meanings:
- mqtt_host: Default
localhost. Host for mosquitto - mqtt_port: Default
1883. Port for mosquitto - mqtt_clientid: Default
mosquitto. Mosquitto client id - mqtt_keepalive: Default
60. mqtt keepalive ping - mqtt_topic: Default
/logstash. Topic to publish to - rabbitmq_host: Defaults
localhost. Host for RabbitMQ - rabbitmq_port: Defaults
5672. Port for RabbitMQ - rabbitmq_vhost: Default
/ - rabbitmq_username: Default
guest - rabbitmq_password: Default
guest - rabbitmq_queue: Default
logstash-queue. - rabbitmq_exchange_type: Default
direct. - rabbitmq_exchange_durable: Default
0. - rabbitmq_key: Default
logstash-key. - rabbitmq_exchange: Default
logstash-exchange. - redis_url: Default
redis:https://localhost:6379/0. Redis URL - redis_namespace: Default
logstash:beaver. Redis key namespace - sqs_aws_access_key: Can be left blank to use IAM Roles or AWS_ACCESS_KEY_ID environment variable (see: https://github.com/boto/boto#getting-started-with-boto)
- sqs_aws_secret_key: Can be left blank to use IAM Roles or AWS_SECRET_ACCESS_KEY environment variable (see: https://github.com/boto/boto#getting-started-with-boto)
- sqs_aws_region: Default
us-east-1. AWS Region - sqs_aws_queue: SQS queue (must exist)
- tcp_host: Default
127.0.0.1. TCP Host - tcp_port: Default
9999. TCP Port - udp_host: Default
127.0.0.1. UDP Host - udp_port: Default
9999. UDP Port - zeromq_address: Default
tcp:https://localhost:2120. Zeromq URL - zeromq_hwm: Default None. Zeromq HighWaterMark socket option
- zeromq_bind: Default
bind. Whether to bind to zeromq host or simply connect
The following are used for instances when a TransportException is thrown - Transport dependent
- respawn_delay: Default
3. Initial respawn delay for exponential backoff - max_failure: Default
7. Max failures before exponential backoff terminates
The following configuration keys are for SinceDB support. Specifying these will enable saving the current line number in an sqlite database. This is useful for cases where you may be restarting the beaver process, such as during a logrotate.
- sincedb_path: Default
None. Full path to ansqlite3database. Will be created at this path if it does not exist. Beaver process must have read and write access
The following configuration keys are for building an SSH Tunnel that can be used to proxy from the current host to a desired server. This proxy is torn down when Beaver halts in all cases.
- ssh_key_file: Default
None. Full path toid_rsakey file - ssh_tunnel: Default
None. SSH Tunnel in the formatuser@host:port - ssh_tunnel_port: Default
None. Local port for SSH Tunnel - ssh_remote_host: Default
None. Remote host to connect to within SSH Tunnel - ssh_remote_port: Default
None. Remote port to connect to within SSH Tunnel
The following can also be passed via argparse. Argparse will override all options in the configfile, when specified.
- format: Default
json. Options[ json, msgpack, string ]. Format to use when sending to transport - files: Default
files. Space-separated list of files to tail. (Comma separated if specified in the config file) - path: Default
/var/log. Path glob to tail. - transport: Default
stdout. Transport to use when log changes are detected - fqdn: Default
False. Whether to use the machine's FQDN in transport output - hostname: Default
None. Manually specified hostname
Example 1: Listen to all files in the default path of /var/log on standard out as json:
beaver
Example 2: Listen to all files in the default path of /var/log on standard out with msgpack:
beaver --format msgpack
Example 3: Listen to all files in the default path of /var/log on standard out as a string:
beaver --format string
Example 4: Sending logs from /var/log files to a redis list:
# /etc/beaver/conf [beaver] redis_url: redis:https://localhost:6379/0 # From the commandline beaver -c /etc/beaver/conf -t redis
Example 5: Zeromq listening on port 5556 (all interfaces):
# /etc/beaver/conf
[beaver]
zeromq_address: tcp:https://*:5556
# logstash indexer config:
input {
zeromq {
type => 'shipper-input'
mode => 'client'
topology => 'pushpull'
address => 'tcp:https://shipperhost:5556'
}
}
output { stdout { debug => true } }
# From the commandline
beaver -c /etc/beaver/conf -m bind -t zmq
Example 6: Zeromq connecting to remote port 5556 on indexer:
# /etc/beaver/conf
[beaver]
zeromq_address: tcp:https://indexer:5556
# logstash indexer config:
input {
zeromq {
type => 'shipper-input'
mode => 'server'
topology => 'pushpull'
address => 'tcp:https://*:5556'
}
}
output { stdout { debug => true } }
# on the commandline
beaver -c /etc/beaver/conf -m connect -t zmq
Example 7: Real-world usage of Redis as a transport:
# in /etc/hosts
192.168.0.10 redis-internal
# /etc/beaver/conf
[beaver]
redis_url: redis:https://redis-internal:6379/0
redis_namespace: app:unmappable
# logstash indexer config:
input {
redis {
host => 'redis-internal'
data_type => 'list'
key => 'app:unmappable'
type => 'app:unmappable'
}
}
output { stdout { debug => true } }
# From the commandline
beaver -c /etc/beaver/conf -f /var/log/unmappable.log -t redis
Example 8: RabbitMQ connecting to defaults on remote broker:
# /etc/beaver/conf
[beaver]
rabbitmq_host: 10.0.0.1
# logstash indexer config:
input { amqp {
name => 'logstash-queue'
type => 'direct'
host => '10.0.0.1'
exchange => 'logstash-exchange'
key => 'logstash-key'
exclusive => false
durable => false
auto_delete => false
}
}
output { stdout { debug => true } }
# From the commandline
beaver -c /etc/beaver/conf -t rabbitmq
Example 9: Read config from config.ini and put to stdout:
# /etc/beaver/conf:
; follow a single file, add a type, some tags and fields
[/tmp/somefile]
type: mytype
tags: tag1,tag2
add_field: fieldname1,fieldvalue1[,fieldname2,fieldvalue2, ...]
; follow all logs in /var/log except those with `messages` or `secure` in the name.
; The exclude tag must be a valid python regular expression.
[/var/log/*log]
type: syslog
tags: sys
exclude: (messages|secure)
; follow /var/log/messages.log and /var/log/secure.log using file globbing
[/var/log/{messages,secure}.log]
type: syslog
tags: sys
# From the commandline
beaver -c /etc/beaver/conf -t stdout
Example 10: TCP transport:
# /etc/beaver/conf
[beaver]
tcp_host: 127.0.0.1
tcp_port: 9999
# logstash indexer config:
input {
tcp {
type => 'shipper-input'
host => '127.0.0.1'
port => '9999'
}
}
output { stdout { debug => true } }
# From the commandline
beaver -c /etc/beaver/conf -t tcp
Example 11: UDP transport:
# /etc/beaver/conf
[beaver]
udp_host: 127.0.0.1
udp_port: 9999
# logstash indexer config:
input {
udp {
type => 'shipper-input'
host => '127.0.0.1'
port => '9999'
}
}
output { stdout { debug => true } }
# From the commandline
beaver -c /etc/beaver/conf -t udp
Example 12: SQS Transport:
# /etc/beaver/conf
[beaver]
sqs_aws_region: us-east-1
sqs_aws_queue: logstash-input
sqs_aws_access_key: <access_key>
sqs_aws_secret_access_key: <secret_key>
# logstash indexer config:
input {
sqs {
queue => "logstash-input"
type => "shipper-input"
format => "json_event"
access_key => "<access_key>"
secret_key => "<secret_key>"
}
}
output { stdout { debug => true } }
# From the commandline
beaver -c /etc/beaver/conf -t sqs
Example 13: [Raw Json Support](https://blog.pkhamre.com/2012/08/23/logging-to-logstash-json-format-in-nginx/:
beaver --format rawjson
Example 14: Mqtt transport using Mosquitto:
# /etc/beaver/conf
[beaver]
mqtt_client_id: 'beaver_client'
mqtt_topic: '/logstash'
mqtt_host: '127.0.0.1'
mqtt_port: '1318'
mqtt_keepalive: '60'
# logstash indexer config:
input {
mqtt {
host => '127.0.0.1'
data_type => 'list'
key => 'app:unmappable'
type => 'app:unmappable'
}
}
output { stdout { debug => true } }
# From the commandline
beaver -c /etc/beaver/conf -f /var/log/unmappable.log -t mqtt
Example 15: Sincedb support using and sqlite3 db
Note that this will require R/W permissions on the file at sincedb path, as Beaver will store the current line for a given filename/file id.:
# /etc/beaver/conf [beaver] sincedb_path: /etc/beaver/since.db [/var/log/syslog] type: syslog tags: sys,main sincedb_write_interval: 3 ; time in seconds # From the commandline beaver -c /etc/beaver/conf
Example 16: Loading stanzas from /etc/beaver/conf.d/* support:
# /etc/beaver/conf [beaver] format: json # /etc/beaver/conf.d/syslog [/var/log/syslog] type: syslog tags: sys,main # /etc/beaver/conf.d/nginx [/var/log/nginx] format: rawjson type: nginx tags: nginx,server # From the commandline beaver -c /etc/beaver/conf
As you can see, beaver is pretty flexible as to how you can use/abuse it in production.
- More documentation
- <del>Use python threading + subprocess in order to support usage of
yieldacross all operating systems</del> - <del>Fix usage on non-linux platforms - file.readline() does not work as expected on OS X. See above for potential solution</del>
- More transports
- <del>Ability to specify files, tags, and other metadata within a configuration file</del>
When using copytruncate style log rotation, two race conditions can occur:
Any log data written prior to truncation which beaver has not yet read and processed is lost. Nothing we can do about that.
Should the file be truncated, rewritten, and end up being larger than the original file during the sleep interval, beaver won't detect this. After some experimentation, this behavior also exists in GNU tail, so I'm going to call this a "don't do that then" bug :)
Additionally, the files beaver will most likely be called upon to watch which may be truncated are generally going to be large enough and slow-filling enough that this won't crop up in the wild.
When you get an error similar to ImportError: No module named
_sqlite3 your python seems to miss the sqlite3-module. This can be the
case on FreeBSD and probably other systems. If so, use the local package
manager or port system to build that module. On FreeBSD:
cd /usr/ports/databases/py-sqlite3 sudo make install clean
Based on work from Giampaolo and Lusis:
Real time log files watcher supporting log rotation. Original Author: Giampaolo Rodola' <g.rodola [AT] gmail [DOT] com> https://code.activestate.com/recipes/577968-log-watcher-tail-f-log/ License: MIT Other hacks (ZMQ, JSON, optparse, ...): lusis