5 Container Alternatives to Docker

1

Docker

Docker is certainly a popular runtime for today’s containers and is probably not going anywhere for some time. With that said, its superiority may be dwindling as other containerization methods are refined for specific environments. If the use of non-Docker containers surges, it could have a ripple effect on the tooling industry built around Docker platform.

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2

rkt

In 2018, 12 percent of production containers were rkt (pronounced “Rocket”). Rkt supports two types of images: Docker and appc. A selling point of rkt is its pod-based process that works out of the box with Kubernetes (also referred to as “rktnetes”). In Kubernetes, an rkt container runtime can easily be specified:

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3

Apache Mesos

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4

LXC

Next up, 1 percent of containers were LXC Linux Containers in 2018. Nicknamed “chroot on steroids,” LXC dates back before Docker picked up steam. Thus, LXC has a pretty active community around it.

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6

containerd

containerd is described as “an industry-standard container runtime with an emphasis on simplicity, robustness and portability.” An incubating project of the Cloud Native Computing Foundation, containerd is available as a daemon for Linux or Windows.

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