To rebuild an image for a build config named phpbuild, which OpenShift CLI command should you run?

• A. oc start-build phpbuild-2
• B. oc start-build phpbuild
• C. oc trigger-build phpbuild
• D. oc new-build phpbuild

Answer: (B)

To rebuild the image for a BuildConfig, you need to trigger a new build for that config. OpenShift uses a BuildConfig to define how an image is built, and starting a new build with the CLI creates a fresh Build object that runs the configured build steps again. For a BuildConfig named phpbuild, the correct command is to start a new build for that config, which begins the rebuild using the latest source and settings. The other options either target a specific previous build, refer to a nonstandard command, or create a new BuildConfig rather than rebuilding the existing one, so they don’t fit the intent of triggering a fresh rebuild.