Agent Configuration (v2)

The Blackfire agent can be configured via a configuration file, flags passed to the binary, or environment variables.

Configuring the Agent via a Configuration File

The location of the default agent configuration file depends on your platform:

  • On Linux: /etc/blackfire/agent;
  • On macOS: /usr/local/etc/blackfire/agent;
  • On Windows: C:\ProgramData\blackfire\agent.ini.

The most important entries are server-id and server-token. Here is a typical configuration for the Agent that you can use as a template:

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[blackfire]
;
; setting: server-id
; desc   : Sets the server id used to authenticate with Blackfire
; default:
;
; You can find your personal server-id at https://blackfire.io/my/settings/credentials
server-id=<YOUR_SERVER_ID>

;
; setting: server-token
; desc   : Sets the server token used to authenticate with Blackfire. It is unsafe to set this from the command line
; default:
;
; You can find your personal server-token at https://blackfire.io/my/settings/credentials
server-token=<YOUR_SERVER_TOKEN>

;
; setting: log-file
; desc   : Sets the path of the log file. Use stderr to log to stderr
; default: stderr
log-file=stderr

;
; setting: log-level
; desc   : log verbosity level (4: debug, 3: info, 2: warning, 1: error)
; default: 1
log-level=1

;
; setting: memory-limit
; desc   : Sets the maximum allowed RAM usage (megabytes) when ingesting traces. Use 0 to disable
; default: 500
memory-limit=500

;
; setting: socket
; desc   : Sets the socket the agent should read traces from. Possible value can be a unix socket or a TCP address
;
; default Linux:
; socket=unix:///var/run/blackfire/agent.sock
;
; default macOS amd64:
; unix:///usr/local/var/run/blackfire-agent.sock
;
; default macOS arm64 (M1):
; unix:///opt/homebrew/var/run/blackfire-agent.sock
;
; default Windows:
; socket=tcp://127.0.0.1:8307

;
; setting: ca-cert
; desc   : Sets the PEM encoded certificates
; default:
; ca-cert=

;
; setting: collector
; desc   : Sets the URL of Blackfire's data collector
; default: https://blackfire.io
; collector=https://blackfire.io

;
; setting: statsd
; desc   : Sets the statsd server to send agent's statistics to. ie: udp://host:port. Leave empty to disable.
; default:
; statsd=

;
; setting: statsd-prefix
; desc   : Sets the statsd prefix to use when sending data
; default: blackfire
; statsd-prefix=blackfire

Configuring the Agent via Environment Variables

The Agent can also be configured using environment variables:

  • BLACKFIRE_SERVER_ID / BLACKFIRE_SERVER_TOKEN

    Sets the server id and server token used to authenticate with Blackfire

    or to display your Blackfire's credentials.
  • BLACKFIRE_LOG_LEVEL

    Sets the verbosity of Agent’s log output. Default value is 1 (error).

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    # 1: error, 2: warning, 3: info, 4: debug
    BLACKFIRE_LOG_LEVEL=1
    
  • BLACKFIRE_LOG_FILE

    Sets the output destination of Agent’s log. Default value is stderr.

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    BLACKFIRE_LOG_FILE="/tmp/blackfire-agent.log"
    
  • BLACKFIRE_CONFIG

    Sets the location of the configuration file

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    BLACKFIRE_CONFIG="/dev/null"
    
  • BLACKFIRE_MEMORY_LIMIT

    Sets the maximum allowed RAM usage (megabytes) when ingesting traces. Use 0 to disable

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    BLACKFIRE_MEMORY_LIMIT=500
    
  • BLACKFIRE_SOCKET

    Sets the socket the Agent will listen for the probes on. Possible values can be a unix socket or a TCP address.

    The default value is platform dependent, as detailed below.

    On Linux:

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    BLACKFIRE_SOCKET="unix:///var/run/blackfire/agent.sock"
    

    On macOS:

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    # amd64
    BLACKFIRE_AGENT_SOCKET="unix:///usr/local/var/run/blackfire-agent.sock"
    
    # arm64 (M1)
    BLACKFIRE_AGENT_SOCKET="unix:///opt/homebrew/var/run/blackfire-agent.sock"
    

    On Windows:

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    BLACKFIRE_SOCKET="tcp://127.0.0.1:8307"
    

    On Docker, it is suggested to use this value:

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    BLACKFIRE_SOCKET="tcp://0.0.0.0:8307"
    
  • BLACKFIRE_COLLECTOR

    Sets the URL of Blackfire’s data collector. Default value is https://blackfire.io.

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    BLACKFIRE_COLLECTOR="https://blackfire.io"
    
  • BLACKFIRE_STATSD

    Sets the statsd server to send agent’s statistics to. ie: udp://host:port.

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    BLACKFIRE_STATSD="udp://host:port"
    
  • BLACKFIRE_STATSD_PREFIX

    Sets the statsd prefix to use when sending data. Default value is blackfire.

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    BLACKFIRE_STATSD_PREFIX="blackfire"
    

You can set these environment variables in a project’s local .env file if supported, or in your global shell configuration file (such as ~/.bashrc or ~/.zshrc):

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export BLACKFIRE_SERVER_ID=xxx
export BLACKFIRE_SERVER_TOKEN=yyy
export BLACKFIRE_LOG_LEVEL=4
export BLACKFIRE_LOG_FILE=/tmp/agent.log

Running the Agent Behind an HTTP(s) Proxy

Warning

If you are behind a proxy, define the HTTP_PROXY and/or HTTPS_PROXY environment variables.