CRI-O: All the runtime Kubernetes needs: 
Alongside the huge rise in the use of container technology over the past few years, we’ve seen similar growth in Docker. Because Docker made it easier to create containers than previous solutions, it quickly became the most popular tool for running containers; however, that Docker solved only part of the problem was soon apparent. Although Docker was good for running containers locally on a single machine, it didn’t work as well for running software at scale on a cluster.
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