MicroSvcs_ConfigCenter-[TODO]

• Configuration center

  • Motivation

  • Config operations and open source comparison [Todo]

  • Requirements on configuration center

  • Configuration categories

    • Static configuration

    • Dynamic configuration

  • Use case

    • Blue green deploymment

    • Graceful downgrade

    • DB migration

    • AB testing

    • Continuous delivery

      • Feature flag driven development

      • Trunk based development

  • Apollo Architecture (In Chinese)

Configuration center

Motivation

• TODO: Review in case of missing

• Static config files could not be changed dynamically. Need to be redeployed

• Configuration exists in many different places (e.g. xml, properties, DB). Errorprone for livesites.

• No security audit and version control

• Cloud native requires immutable infrastructure and microservices. This type of continuous delivery requires the architecture of configuration center.

Config operations and open source comparison [Todo]

• Config operations and open source comparison: https://time.geekbang.org/column/article/41509

Requirements on configuration center

• Access control and audit history

• Gradual rollout

• Management for different environments/clusters

Configuration categories

Static configuration

• Database/middleware/service connection string

• Username, password, token, certificates

Dynamic configuration

• Application configuration: Request timeout, thread pool, queue, cache, connnection pool size, circuit breaker threshold, black-white list

• Function on-off toggles: Blue green deployment, HA toggle

• Business logic toggles:

Use case

Blue green deploymment

MySQL HA github

Graceful downgrade

MySQL HA github

DB migration

• https://blog.launchdarkly.com/feature-flagging-to-mitigate-risk-in-database-migration

AB testing

MySQL HA github

Continuous delivery

Feature flag driven development

• Pros:

• Cons:

MySQL HA github

Trunk based development

• https://www.stevesmith.tech/blog/organisation-pattern-trunk-based-development/

• Benefits:

  • Replanning

MySQL HA github

Apollo Architecture (In Chinese)

• Server architecture: https://time.geekbang.org/course/detail/100007001-8843

• Client architecture: https://time.geekbang.org/course/detail/100007001-8844

• High availability architecture: https://time.geekbang.org/course/detail/100007001-8845

• Appolo architecture: https://time.geekbang.org/course/detail/100003901-2273