How to Write Deployment-friendly Applications

Speaker

Hynek Schlawack

Material

• video
• slide
• article

Note

Configuration

• What varies?
• use environment variables
  • setting
    • direnv
    • envconsul
  • consuming
    • environ_config
  • templating
    • envsubst
    • confd
    • consul-template
• don't put sensitive data into env variables
  • HashiCorp's vault
  • docker secrets
  • aws secret manager
  • microsoft azure key value
  • google cloud KMS

Load balancing

• rolling update
• make sure you handle SIGTERM
• how load balancer know you're ready?
  • readiness
    • e.g., /healthz, /__heartbeat__, /-/ready, /-/readiness
  • liveness
    • e.g., /-/healthy, /-/liveness, /__lbheartbeat__
  • more
    • __version__
    • /-/metrics
    • /-/log-level

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