logrotate-wallets

A logrotate config for miners and pool operators running multiple cryptocurrency wallets. Keeps debug.log files under control so you can leave logging enabled and still maintain a small disk footprint -- useful when running on VPS servers with limited storage.

No daemon restarts required. Works across any number of wallets and users with a single config file.

What it does

• Matches debug.log in any hidden-directory wallet under any user's home (/home/*/.*/debug.log)
• Rotates when a log hits 100 MB
• Keeps 3 compressed archives per wallet
• Uses copytruncate -- truncates the log in place, no wallet restart or signal needed
• Picks up new wallets and users automatically, no config changes required

Deploy

sudo cp wallet-debug-logrotate.conf /etc/logrotate.d/wallet-debug
sudo chown root:root /etc/logrotate.d/wallet-debug
sudo chmod 644 /etc/logrotate.d/wallet-debug

Logrotate requires the config file to be owned by root and not group-writable -- skipping these steps will cause it to silently ignore the config.

Logrotate runs daily automatically via /etc/cron.daily/logrotate or systemd logrotate.timer. No cron job needed.

Test before deploying

# Dry run -- shows what would happen, no changes made
sudo logrotate -d /etc/logrotate.d/wallet-debug

# Force rotate now
sudo logrotate -f /etc/logrotate.d/wallet-debug

Customization

Open wallet-debug-logrotate.conf and adjust these values to suit your available disk space:

Setting	Default	Description
size 100M	100 MB	Rotate when log exceeds this size. Use M for MB or G for GB
rotate 3	3	Number of archived logs to keep per wallet before deleting the oldest
/home/*/.*/debug.log	all users	Narrow to a specific user with /home/myuser/.*/debug.log

After changing the config, test with a dry run before deploying:

sudo logrotate -d /etc/logrotate.d/wallet-debug

Deploying to multiple servers

If you manage multiple VPS servers, pssh4cssh pairs well with this -- it lets you deploy to all your servers in one command using ClusterSSH-style group definitions.

You don't need ClusterSSH installed. Just create ~/.clusterssh/clusters with your host groups and pssh4cssh will read it directly.

pscp-c vps-all wallet-debug-logrotate.conf /home/ubuntu/
pssh-c vps-all "sudo mv ~/wallet-debug-logrotate.conf /etc/logrotate.d/wallet-debug && sudo chown root:root /etc/logrotate.d/wallet-debug && sudo chmod 644 /etc/logrotate.d/wallet-debug"

See wallet-debug-logrotate.md for full details on config options and archived log naming.

Donate

If this saves your disks, tips are appreciated:

Coin	Address
LTC	LWpuHQUGw3qZg8MCHYGgTPRZ3a1i8jc5u3
BTC	bc1qw0t40dunylgtz9kgfylwxac3a8vwp70cgrga5r
SOL	up9YvW6ewNati5fmmDjGHzFbq8UkSbHPccoDNzijk3G
POL	0x5198f52fA768294ae66f0cB75A98DCc895a36F2E
DOGE	DJAg2fTzS5vN3yXDPn5gGPz9JSmzJn3cXD

License

MIT © oneidprod