Pm2: env LD_PRELOAD not effect on Cluster Mode

[Cow258]

https://github.com/Unitech/pm2/issues/3684
https://github.com/Unitech/pm2/issues/2618
https://github.com/lovell/sharp/issues/1803

What's going wrong?

Unable to load env LD_PRELOAD under Cluster Mode

How could we reproduce this issue?

Full detail here
https://github.com/lovell/sharp/issues/1803

Supporting information

$ pm2 report
--- PM2 report ----------------------------------------------------------------
Date                 : Tue Jul 30 2019 04:04:02 GMT+0000 (Coordinated Universal Time)
===============================================================================
--- Daemon -------------------------------------------------
pm2d version         : 3.5.1
node version         : 12.6.0
node path            : not found
argv                 : /usr/bin/node,/usr/lib/node_modules/pm2/lib/Daemon.js
argv0                : node
user                 : ubuntu
uid                  : 1000
gid                  : 1000
uptime               : 40min
===============================================================================
--- CLI ----------------------------------------------------
local pm2            : 3.5.1
node version         : 12.6.0
node path            : /usr/bin/pm2
argv                 : /usr/bin/node,/usr/bin/pm2,report
argv0                : node
user                 : ubuntu
uid                  : 1000
gid                  : 1000
===============================================================================
--- System info --------------------------------------------
arch                 : x64
platform             : linux
type                 : Linux
cpus                 : Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHz
cpus nb              : 1
freemem              : 395948032
totalmem             : 1031700480
home                 : /home/ubuntu
===============================================================================

[Cow258]

@Unitech This issue still here for a long time, could you please take a look at this? Thanks

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Cow258]

The issue still here today

[lokoArt]

Facing the same issue. any suggestions?

[Unitech]

Cluster mode is tightly linked on how PM2 has been started.
So if you want to load a specific LD_PRELOAD, you need to restart PM2 with that env variable.

So:

pm2 kill
LD_PRELOAD=xxxx pm2 ls
# Now if you start an app in cluster mode, LD_PRELOAD will be injected in that app
pm2 start app.js -i max

[Cow258]

@Unitech How to ensure pm2 used LD_PRELOAD when system boot up?

[Cow258]

@lokoArt
Currently,
I am using fork mode to prevent memory leak.
But that cause unable to provide zero-downtime service,
all update required between scheduled maintenance period like 02:00-03:00,
or accept the downtime when you need update immediate.

If set env LD_PRELOAD=xxxx before pm2 start that is work,
I will change all instance into cluster mode.

[Cow258]

Successful to add LD_PRELOAD=xxxx into Cluster mode!
🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉

Add LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1
Into /env/environment
Also do
export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1
Then
sudo reboot

The cluster mode will working with LD_PRELOAD=xxxx,
Not issue when processing many big size images with sharp.js,
Thanks to @Unitech provide some tips for this issue.

[jordygroote]

Successful to add LD_PRELOAD=xxxx into Cluster mode!
🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉

Add LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1
Into /env/environment
Also do
export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1
Then
sudo reboot

The cluster mode will working with LD_PRELOAD=xxxx,
Not issue when processing many big size images with sharp.js,
Thanks to @Unitech provide some tips for this issue.

Where to place LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1, /env/environment isn't a valid directory?