---
name: "corosync-blackbox"
section: "8"
platform: "linux"
package: "corosync"
version: "3.1.9-2+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/corosync-blackbox"
---

# corosync-blackbox(8)

Dump live "flight data" from the corosync "blackbox".

## NAME

corosync-blackbox - Dump live "flight data" from the corosync "blackbox".

## SYNOPSIS

**corosync-blackbox**

## DESCRIPTION

**corosync-blackbox** Trigger corosync to write it's "flight data" out to file and then run **qb-blackbox** which prints it out.

## EXAMPLES

- Print the current "flight data".

  $ corosync-blackbox \
   Starting replay: head \[74205\] tail \[0\]\
   rec=\[1\] Log Message=Corosync Cluster Engine ('1.2.1'): started and ready to provide service.\
   \[...\]\
   rec=\[2607\] Log Message=Delivering MCAST message with seq a to pending delivery queue\
   rec=\[2608\] Log Message=downlist received left\_list: 2\
   rec=\[2609\] Log Message=chosen downlist from node r(0) ip(192.168.100.11) \
   Finishing replay: records found \[2609\]\

## SEE ALSO

[**qb-blackbox**(8)](/qb-blackbox/8.md), [**corosync-cmapctl**(8)](/corosync-cmapctl/8.md)

## AUTHOR

Angus Salkeld