Docker containers are growing in popularity as a deployment platform for enterprise applications. However, the performance impact of running these applications in Docker containers on virtualized infrastructures is not well understood. A new white paper is available that uses the open source Weathervane performance benchmark to investigate the performance of an enterprise web application running in Docker containers in VMware vSphere 6.5 virtual machines (VMs). The results show that an enterprise web application can run in Docker on a VMware vSphere environment with not only no degradation of performance, but even better performance than a Docker installation on bare-metal.
Weathervane is used to evaluate the performance of virtualized and cloud infrastructures by deploying an enterprise web application on the infrastructure and then driving a load on the application. The tests discussed in the paper use three different deployment configurations for the Weathervane application.
- VMs without Docker containers: The application runs directly in the guest operating systems in vSphere 6.5 VMs, with no Docker containers.
- VMs with Docker containers: The application runs in Docker containers, which run in guest operating systems in vSphere 6.5 VMs.
- Bare-metal with Docker containers: The application runs in Docker containers, but the containers run in an operating system that is installed on a bare-metal server.
The figure below shows the peak results achieved when running the Weathervane benchmark in the three configurations. The results using Docker containers include the impact of tuning options that are discussed in detail in the paper.
Some important things to note in these results:
- The performance of the application using Docker containers in vSphere 6.5 VMs is almost identical to that of the same application running in VMs without Docker.
- The application running in Docker containers in VMs outperforms the same application running in Docker containers on bare metal by about 5%. Most of this advantage can be attributed to the sophisticated algorithms employed by the vSphere 6.5 scheduler.
The results discussed in the paper, along with the results of previous investigations of Docker performance on vSphere, show that vSphere 6.5 is an ideal platform for deploying applications in Docker containers.
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