Charm writing

Writing charms

• Getting started
• Event cycle and reactive states
• Charm layers and states
• Layer files
• Writing a charm layer
• Interface layers
• Implementing relations
• Relations lifecycle
• Upgrading a charm
• Juju terms
• Juju metrics
• Charm resources
• Charm hooks
• Hook tools
• Hook environment
• Network primitives
• Implementing leadership
• Implementing actions
• Implementing storage
• Writing charm tests
• Using Docker
• Writing your first Juju charm
• Charms and MySQL interfaces
• Charm components
• Charm configuration
• Subordinates
• Benchmarking applications

Debugging charms

• Hook errors
• Debugging charm hooks
• DHX - Hook debugging plugin
• Debugging layers

Charm authors

• Becoming a charm author
• Charm promulgation
• Charm review process

Charm Store

• Working with the Charm Store
• Charm store policy
• Best practice
• Charm icons