If something works or doesn’t work, it is likely to have the same effect in production.Įnvironments are pre-installed with the application, which means that we are always testing the exact same artifacts, so we get artifact consistencyīecause environments are pre-installed, we are also in-explicitly testing the installation/deployment scripts of the application.Īlso notice that there is no “installation” after the pre-baking stage. This provides environmental consistency between all tests and stages, and removes any false positives or negatives. The reason we are always using the same environment template, is because: Staging environments are designed to look exactly like production (in fact, in this case, we are using staging as a production environment in the final stage). Notice that the environment we are spinning up and spinning down is always the same environment, and it is a staging environment with the application pre-loaded on top of it. ![]() Spin down old prod environment (this is a very simplistic solution) Switch DNS from old production to new environment Run approval tests/wait for approval and provide a link to the environment for humans to look into the environment Save AMIs for later instantiation as STAGING environment (in places such as S3, artifactory etc.) ![]() ![]() There is also an stage (2) that creates a pre-baked environment as a set of AMIs of VM images (or containers) to later be instantiated. The first step(1) is to compile and run fast unit tests, followed by putting the binaries in s aspecial binary repository such as artifactory. In an ephemeral environment configuration, each relevant stage would contain two extra actions: one at the beginning, and one at the end, that spin up an environment for the purpose of testing, and spin it down at the end of the stage. In a traditional static environment configuration, each stage (perhaps except the build stage) would be configured to run again a static environment that is already built and is waiting for it, or some steps might share the same environment, which causes all the issues I mentioned previously.
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