Kubernetes Borg/Omega history topic 1: In Borg, Job Tasks were scheduled into Alloc instances, but almost everyone pinned groups of tasks into each instance. Often these were sidecars, such as for logging or caching.
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It enables Kubernetes and other systems to observe which apps are running (from their images), when and why they fail, how much CPU and RAM they are using, etc. And, importantly, enables images to be generated as part of the build process rather than during deployment.
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And, something that's often overlooked, a Pod shares a network identity, storage volumes, and other OS and machine resources. This makes it easier to migrate to from VMs.
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We started to work on what became the Kubernetes API in October 2013, before we had settled on Open Source or a hosted/managed cloud project. Exploration intensified in early 2014, a few team members started to work on libcontainer, and the container-agent was released in May
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