chef-logstash

Description

This is the semi-official 'all-in-one' Logstash cookbook.

Requirements

All of the requirements are explicitly defined in the recipes. Every effort has been made to utilize official Opscode cookbooks.

However if you wish to use an external ElasticSearch cluster, you will need to install that yourself and change the relevant attributes for discovery. The same applies to integration with Graphite.

This cookbook has been tested together with the following cookbooks

Heavywater Graphite Cookbook - This is the one I use
Karmi's ElasticSearch Cookbook

Attributes

Default

node['logstash']['basedir'] - the base directory for all the Logstash components
node['logstash']['user'] - the owner for all Logstash components
node['logstash']['group'] - the group for all Logstash components
node['logstash']['graphite_role'] - the Chef role to search for discovering your preexisting Graphite server
node['logstash']['elasticsearch_role'] - the Chef role to search for discovering your preexisting ElasticSearch cluster.
node['logstash']['elasticsearch_cluster'] - the cluster name assigned to your preexisting ElasticSearch cluster. Only applies to external ES clusters.
node['logstash']['elasticsearch_ip'] - the IP address that will be used for your elasticsearch server in case you are using Chef-solo
node['logstash']['graphite_ip'] - the IP address that will be used for your graphite server in case you are using Chef-solo
node['logstash']['join_groups'] - An array of Operative System groups to join. Usefull to gain read privileges on some logfiles.
node['logstash']['patterns'] - A hash with grok patterns to be used on grok and multiline filters.

Agent

node['logstash']['agent']['install_method'] - The method to install logstash - either jar or source, defaults to jar
node['logstash']['agent']['version'] - The version of Logstash to install. Only applies to jar install method.
node['logstash']['agent']['source_url'] - The URL of the Logstash jar to download. Only applies to jar install method.
node['logstash']['agent']['checksum'] - The checksum of the jar file. Only applies to jar install method.
node['logstash']['agent']['base_config'] - The name of the template to use for logstash.conf as a base config.
node['logstash']['agent']['base_config_cookbook'] - Where to find the base_config template.
node['logstash']['agent']['xms'] - The minimum memory to assign the JVM.
node['logstash']['agent']['xmx'] - The maximum memory to assign the JVM.
node['logstash']['agent']['java_opts'] - Additional params you want to pass to the JVM
node['logstash']['agent']['gc_opts'] - Specify your garbage collection options to pass to the JVM
node['logstash']['agent']['ipv4_only'] - Add jvm option preferIPv4Stack?
node['logstash']['agent']['debug'] - Run logstash with -v option?
node['logstash']['agent']['server_role'] - The role of the node behaving as a Logstash server/indexer
node['logstash']['agent']['inputs'] - Array of input plugins configuration.
node['logstash']['agent']['filters'] - Array of filter plugins configuration.
node['logstash']['agent']['outputs'] - Array of output plugins configuration.
node['logstash']['agent']['patterns_dir'] - The patterns directory where pattern files will be generated. Relative to the basedir or absolute.

Server

node['logstash']['server']['install_method'] - The method to install logstash - either jar or source
node['logstash']['server']['version'] - The version of Logstash to install. Only applies to jar install method.
node['logstash']['server']['source_url'] - The URL of the Logstash jar to download. Only applies to jar install method.
node['logstash']['server']['checksum'] - The checksum of the jar file. Only applies to jar install method.
node['logstash']['server']['base_config'] - The name of the template to use for logstash.conf as a base config.
node['logstash']['server']['base_config_cookbook'] - Where to find the base_config template.
node['logstash']['server']['xms'] - The minimum memory to assign the JVM.
node['logstash']['server']['xmx'] - The maximum memory to assign the JVM.
node['logstash']['server']['java_opts'] - Additional params you want to pass to the JVM
node['logstash']['server']['gc_opts'] - Specify your garbage collection options to pass to the JVM
node['logstash']['server']['ipv4_only'] - Add jvm option preferIPv4Stack?
node['logstash']['server']['debug'] - Run logstash with -v option?
node['logstash']['server']['enable_embedded_es'] - Should Logstash run with the embedded ElasticSearch server or not?
node['logstash']['server']['install_rabbitmq'] - Should this recipe install rabbitmq?
node['logstash']['server']['inputs'] - Array of input plugins configuration.
node['logstash']['server']['filters'] - Array of filter plugins configuration.
node['logstash']['server']['outputs'] - Array of output plugins configuration.
node['logstash']['server']['patterns_dir'] - The patterns directory where pattern files will be generated. Relative to the basedir or absolute.

Kibana

node['logstash']['kibana']['repo'] - The git repo to install Kibana from.
node['logstash']['kibana']['sha'] - The sha/branch of the repo you wish to clone.
node['logstash']['kibana']['apache_template'] - The name of the template file to use for the Apache site file
node['logstash']['kibana']['config'] - The name of the template to use for the Kibana config.php file
node['logstash']['kibana']['server_name'] - The value to use for the Apache ServerName variable to use for the Kibana Apache virtual host.
node['logstash']['kibana']['http_port'] - The port the virtualhost kibana listens on

Beaver (alternative to Logstash Agent)

node['logstash']['beaver']['repo'] - URL or repository to install beaver from (using pip).
node['logstash']['beaver']['server_role'] - The role of the node behaving as a Logstash server/indexer.
node['logstash']['beaver']['server_ipaddress'] - Server IP address to use (needed when not using server_role).
node['logstash']['beaver']['inputs'] - Array of input plugins configuration (Supported: file).
node['logstash']['beaver']['outputs'] - Array of output plugins configuration (Supported: amq, redis, stdout, zeromq).

Source

node['logstash']['source']['repo'] - The git repo to use for the source code of Logstash
node['logstash']['source']['sha'] - The sha/branch of the repo you wish to clone.
node['logstash']['source']['java_home'] - your JAVA_HOME location. Needed explicity for ant when building JRuby

Index Cleaner

node['logstash']['index_cleaner']['days_to_keep'] - Integer number of days from today of Logstash index to keep.

Usage

A proper readme is forthcoming but in the interim....

There are 3 recipes you need to concern yourself with:

server - This would be your indexer node
agent - This would be a local host's agent for collection
kibana - This is the web interface

Every attempt (and I mean this) was made to ensure that the following objectives were met:

Any agent install can talk to a server install
Kibana web interface can talk to the server install
Each component works OOB and with each other
Utilize official opscode cookbooks where possible

This setup makes HEAVY use of roles. Additionally, ALL paths have been made into attributes. Everything I could think of that would need to be customized has been made an attribute.

Defaults

By default, the recipes look for the following roles (defined as attributes so they can be overridden):

graphite_server - node['logstash']['graphite_role']
elasticsearch_server - node['logstash']['elasticsearch_role']
logstash_server - node['logstash']['kibana']['elasticsearch_role'] and node['logstash']['agent']['server_role']

The reason for giving kibana its own role assignment is to allow you to point to existing ES clusters/logstash installs.

The reason for giving agent its own role assignment is to allow the server and agent recipes to work together.

Yes, if you have a graphite installation with a role of graphite_server, logstash will send stats of events received to logstash.events.

Agent and Server configuration

The template to use for configuration is made an attribute as well. This allows you to define your OWN logstash configuration file without mucking with the default templates.

The server will, by default, enable the embedded ES server. This can be overriden as well.

See the server and agent attributes for more details.

Source vs. Jar install methods

Both agent and server support an attribute for how to install. By default this is set to jar to use the 1.1.1preview as it is required to use elasticsearch 0.19.4. The current release is defined in attributes if you choose to go the source route.

Out of the box behaviour

Here are some basic steps

Create a role called logstash_server and assign it the following recipes: logstash::server and logstash::kibana
Assign the role to a new server
Assign the logstash::agent recipe to another server

If there is a system found with the logstash_server role, the agent will automatically configure itself to send logs to it over tcp port 5959. This is, not coincidently, the port used by the chef logstash handler.

If there is NOT a system with the logstash_server role, the agent will use a null output. The default input is to read files from /var/log/*.log excluding and gzipped files.

If you point your browser to the logstash_server system's ip address, you should get the kibana web interface.

Do something to generate a new line in any of the files in the agent's watch path (I like to SSH to the host), and the events will start showing up in kibana. You might have to issue a fresh empty search.

The pyshipper recipe will work as well but it is NOT wired up to anything yet.

Letting data drive your templates

The current templates for the agent and server are written so that you can provide ruby hashes in your roles that map to inputs, filters, and outputs. Here is a role for logstash_server

name "logstash_server"
description "Attributes and run_lists specific to FAO's logstash instance"
default_attributes(
  :logstash => {
    :server => {
      :enable_embedded_es => false,
      :inputs => [
        :amqp => {
          :type => "all",
          :host => "127.0.0.1",
          :exchange => "rawlogs",
          :name => "rawlogs_consumer"
        }
      ],
      :filters => [
        :grok => {
          :type => "haproxy",
          :pattern => "%{HAPROXYHTTP}",
          :patterns_dir => '/opt/logstash/server/etc/patterns/'
        }
      ],
      :outputs => [
        :file => {
          :type => 'haproxy',
          :path => '/opt/logstash/server/haproxy_logs/%{request_header_host}.log',
          :message_format => '%{client_ip} - - [%{accept_date}] "%{http_request}" %{http_status_code} ....'
        }
      ]
    }
  }
)
run_list(
  "role[elasticsearch_server]",
  "recipe[logstash::server]",
  "recipe[php::module_curl]",
  "recipe[logstash::kibana]"
)

It will produce the following logstash.conf file

input {

  amqp {
    exchange => 'rawlogs'
    host => '127.0.0.1'
    name => 'rawlogs_consumer'
    type => 'all'
  }
}

filter {

  grok {
    pattern => '%{HAPROXYHTTP}'
    patterns_dir => '/opt/logstash/server/etc/patterns/'
    type => 'haproxy'
  }
}

output {
  stdout { debug => true debug_format => "json" }
  elasticsearch { host => "127.0.0.1" cluster => "logstash" }

  file {
    message_format => '%{client_ip} - - [%{accept_date}] "%{http_request}" %{http_status_code} ....'
    path => '/opt/logstash/server/haproxy_logs/%{request_header_host}.log'
    type => 'haproxy'
  }
}

Here is an example using multiple filters

default_attributes(
  :logstash => {
    :server => {
      :filters => [
        { :grep => {
            :type => 'tomcat',
            :match => { '@message' => '([Ee]xception|Failure:|Error:)' },
            :add_tag => 'exception',
            :drop => false
        } },
        { :grep => {
            :type => 'tomcat',
            :match => { '@message' => 'Unloading class ' },
            :add_tag => 'unloading-class',
            :drop => false
        } },
        { :multiline => {
            :type => 'tomcat',
            :pattern => '^\s',
            :what => 'previous'
        } }
      ]
    }
  }
)

It will produce the following logstash.conf file

filter {

  grep {
    add_tag => 'exception'
    drop => false
    match => ['@message', '([Ee]xception|Failure:|Error:)']
    type => 'tomcat'
  }

  grep {
    add_tag => 'unloading-class'
    drop => false
    match => ["@message", "Unloading class "]
    type => 'tomcat'
  }

  multiline {
    patterns_dir => '/opt/logstash/patterns'
    pattern => '^\s'
    type => 'tomcat'
    what => 'previous'
  }

}

Adding grok patterns

Grok pattern files can be generated using attributes as follows

default_attributes(
  :logstash => {
    :patterns => {
      :apache => {
        :HTTP_ERROR_DATE => '%{DAY} %{MONTH} %{MONTHDAY} %{TIME} %{YEAR}',
        :APACHE_LOG_LEVEL => '[A-Za-z][A-Za-z]+',
        :ERRORAPACHELOG => '^\[%{HTTP_ERROR_DATE:timestamp}\] \[%{APACHE_LOG_LEVEL:level}\](?: \[client %{IPORHOST:clientip}\])?',
      },
      :mywebapp => {
        :MYWEBAPP_LOG => '\[mywebapp\]',
      },
    },
    [...]
  }
)

This will generate the following files:

/opt/logstash/server/etc/patterns/apache

APACHE_LOG_LEVEL [A-Za-z][A-Za-z]+
ERRORAPACHELOG ^\[%{HTTP_ERROR_DATE:timestamp}\] \[%{APACHE_LOG_LEVEL:level}\](?: \[client %{IPORHOST:clientip}\])?
HTTP_ERROR_DATE %{DAY} %{MONTH} %{MONTHDAY} %{TIME} %{YEAR}

/opt/logstash/server/etc/patterns/mywebapp

MYWEBAPP_LOG \[mywebapp\]

This patterns will be included by default in the grok and multiline filters.

BIG WARNING

Currently only tested on Ubuntu Natty, Precise, and RHEL 6.2.

License and Author

Author:: John E. Vincent
Author:: Bryan W. Berry ([email protected])
Author:: Richard Clamp (@richardc)
Author:: Juanje Ojeda (@juanje)
Author:: @benattar

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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