Centralized Log Management

Sets up log rotation and centralized logging with rsyslog

Script Author

Rowan de Haas's avatar
Rowan de Haas
Script Author

Script Details

Created 9 months ago
Size 2 KB

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Script Content

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#cloud-config
package_update: true
package_upgrade: true

packages:
  - rsyslog
  - logrotate

write_files:
  - path: /etc/rsyslog.d/50-default.conf
    content: |
      # Default logging rules
      auth,authpriv.*                 /var/log/auth.log
      *.*;auth,authpriv.none          -/var/log/syslog
      daemon.*                        -/var/log/daemon.log
      kern.*                          -/var/log/kern.log
      lpr.*                           -/var/log/lpr.log
      mail.*                          -/var/log/mail.log
      user.*                          -/var/log/user.log
      
      # Application logs
      local0.*                        /var/log/application.log
      
  - path: /etc/logrotate.d/application
    content: |
      /var/log/application.log {
          daily
          missingok
          rotate 52
          compress
          delaycompress
          notifempty
          create 644 root root
          postrotate
              /bin/kill -HUP `cat /var/run/rsyslogd.pid 2> /dev/null` 2> /dev/null || true
          endscript
      }

runcmd:
  - systemctl enable rsyslog
  - systemctl restart rsyslog
  - logrotate -d /etc/logrotate.conf

How to Use This Script

Cloud Provider Examples

Amazon EC2

aws ec2 run-instances
  --image-id ami-12345678
  --instance-type t3.micro
  --user-data file://script.yaml

DigitalOcean

doctl compute droplet create
  --image ubuntu-22-04-x64
  --size s-1vcpu-1gb
  --user-data-file script.yaml
  my-droplet

Google Cloud

gcloud compute instances create
  my-instance
  --metadata-from-file
  user-data=script.yaml