Container Lifetime & Persistent Data

• Containers are usually immutable and ephemeral

• "immutable infrastructure": only re-deploy containers, never change

  • This is the ideal scenario, but what about databases, or unique data

    • Docker gives us features to ensure these "separation of concerns"

    • This is known as "persistent data"

• Two ways:

  • Data Volumes: make special location outside of container UFS

  • Bind Mounts: link container path to host path

External links

• An introduction to immutable infrastructure

• The 12-factor app

• 12 Fractured Apps