## Taming Istio Configuration with Helm Ryan Michela / @ryanmichela / Salesforce IstioCon ## I n this talk This is a talk about using Helm with Istio Look at helm from a new perspective • Helm helps config ## DEMO ## Demo - Bookinfo ## What did we see? - Single entry point for each service’s configuration • Install each service with a single command - Single source of truth for auth and egress policy Everything you need to run a service in the mesh • Ingress-service ○ Add’s ingress gateway configuration to mesh-service • Mesh-egress o Configures TLS egress and policy • Auth-policy • Configures

15. Configuration Classes Importing Additional Configuration Classes Importing XML Configuration 16. Auto-configuration Gradually Replacing Auto-configuration Disabling Specific Auto-configuration Classes Externalized Configuration Configuring Random Values Accessing Command Line Properties Application Property Files Profile-specific Properties Placeholders in Properties Using YAML Instead of Properties Loading as Properties in the Spring Environment Multi-profile YAML Documents YAML Shortcomings Type-safe Configuration Properties Third-party Configuration Relaxed Binding Merging Complex Types Properties Conversion

Class ..... 29 3.3. Configuration Classes ..... 31 3.3.1. Importing Additional Configuration Classes ..... 31 3.3.2. Importing XML Configuration ..... 31 3.4. Auto-configuration ..... 31 3.4.1. Gradually Gradually Replacing Auto-configuration ..... 31 3.4.2. Disabling Specific Auto-configuration Classes ..... 32 3.5. Spring Beans and Dependency Injection ..... 32 3.6. Using the @SpringBootApplication Admin Features ..... 53 4.2. Externalized Configuration ..... 54 4.2.1. Configuring Random Values ..... 55 4.2.2. Accessing Command Line Properties ..... 56 4.2.3. Application Property Files

Configuration Classes … 35 15.1. Importing Additional Configuration Classes … 35 15.2. Importing XML Configuration … 35 Auto-configuration … 36 16.1. Gradually Replacing Auto-configuration … 36 36 16.2. Disabling Specific Auto-configuration Classes … 36 Spring Beans and Dependency Injection … 37 Using the @SpringBootApplication Annotation … 38 Running Your Application … 39 19.1. Running from Externalized Configuration … 58 24.1. Configuring Random Values … 59 24.2. Accessing Command Line Properties … 59 24.3. Application Property Files … 60 24.4. Profile-specific Properties … 61 24.5. Placeholders

application class ..... 30 15. Configuration classes ..... 32 15.1. Importing additional configuration classes ..... 32 15.2. Importing XML configuration ..... 32 16. Auto-configuration ..... 33 16.1. Gradually Gradually replacing auto-configuration ..... 33 16.2. Disabling specific auto-configuration ..... 33 17. Spring Beans and dependency injection ..... 34 18. Using the @SpringBootApplication annotation Application exit ..... 44 23. Externalized Configuration ..... 45 23.1. Configuring random values ..... 46 23.2. Accessing command line properties ..... 46 23.3. Application property files ..

(backups, restoration, monitoring...) Both rely heavily on struct tags for communication and configuration.  ## What is a Library for converting between structs and Go's builtin map. ## Why? "If you have configuration or an encoding that changes slightly depending on specific fields" ## I n other words If fmt.println(donation.Donor) // "Hugo Weaving" } else { ... } ## Command-line Configuration github.com/jessevdk/go-flags What is it? Alternative to Go's built-in flag package. Uses