show dev

Show platform and environment details.

Description Jump to heading #

Query the Runtime API with show dev to display platform and environment information. This information is useful for the HAProxy Technologies development and support teams. The output may change from version to version.

The information returned by this command can also be found in the core file produced by a crash. The show dev command makes the information available for processes that have not crashed and left core files.

If anonymizing is enabled, sensitive values, such as node name, are anonymized as well.

Examples Jump to heading #

Show details for developers.

nix
echo "show dev" | \
  sudo socat stdio tcp4-connect:127.0.0.1:9999

nix
echo "show dev" | \
  sudo socat stdio tcp4-connect:127.0.0.1:9999

output
text
Platform info
  machine vendor: To be filled by O.E.M
  machine family: Altra
  cpu model: Impl 0x41 Arch 8 Part 0xd0c r3p1
  virtual machine: no
  container: no
  OS name: Linux
  OS release: 6.2.0-36-generic
  OS version: #37~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Oct  9 18:01:07 UTC 2
  OS architecture: aarch64
  node name: 489aaf
Process info
  pid: 1735846
  boot uid: 509
  boot gid: 1002
  fd limit (soft): 1024
  fd limit (hard): 1048576

output
text
Platform info
  machine vendor: To be filled by O.E.M
  machine family: Altra
  cpu model: Impl 0x41 Arch 8 Part 0xd0c r3p1
  virtual machine: no
  container: no
  OS name: Linux
  OS release: 6.2.0-36-generic
  OS version: #37~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Oct  9 18:01:07 UTC 2
  OS architecture: aarch64
  node name: 489aaf
Process info
  pid: 1735846
  boot uid: 509
  boot gid: 1002
  fd limit (soft): 1024
  fd limit (hard): 1048576

As of version 3.1, show dev also includes information about arguments provided on the command line, capabilities set at process start, and current capabilities, as shown in the example below:

output
text
HAProxy version 3.1.0-f2b9791
Features
[...]
Build options
[...]
Platform info
[...]
Process info
  pid: 8
  cmdline: haproxy -W -db -f /usr/local/etc/haproxy/haproxy.cfg 
  boot uid: 0
  runtime uid: 0
  boot gid: 0
  runtime gid: 0
  boot capabilities:
  	CapEff: 0x00000000a80425fb
  	CapPrm: 0x00000000a80425fb
  	CapInh: 0x0000000000000000
  runtime capabilities:
  	CapEff: 0x00000000a80425fb
  	CapPrm: 0x00000000a80425fb
  	CapInh: 0x0000000000000000
  boot limits:
  	fd limit (soft): 1048576
  	fd limit (hard): 1048576
  	ram limit (soft): unlimited
  	ram limit (hard): unlimited
  runtime limits:
  	fd limit (soft): 1048576
  	fd limit (hard): 1048576
  	ram limit (soft): unlimited

output
text
HAProxy version 3.1.0-f2b9791
Features
[...]
Build options
[...]
Platform info
[...]
Process info
  pid: 8
  cmdline: haproxy -W -db -f /usr/local/etc/haproxy/haproxy.cfg 
  boot uid: 0
  runtime uid: 0
  boot gid: 0
  runtime gid: 0
  boot capabilities:
  	CapEff: 0x00000000a80425fb
  	CapPrm: 0x00000000a80425fb
  	CapInh: 0x0000000000000000
  runtime capabilities:
  	CapEff: 0x00000000a80425fb
  	CapPrm: 0x00000000a80425fb
  	CapInh: 0x0000000000000000
  boot limits:
  	fd limit (soft): 1048576
  	fd limit (hard): 1048576
  	ram limit (soft): unlimited
  	ram limit (hard): unlimited
  runtime limits:
  	fd limit (soft): 1048576
  	fd limit (hard): 1048576
  	ram limit (soft): unlimited