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Working with Docker

There are multiple ways to use Evmos with Docker. If you want to run Evmos inside a Docker setup and possibly connect the Docker container to other containerized compatible blockchain binaries, check out the guide on building a Docker image containing the Evmos binary. If you instead want to generate a binary for use outside of Docker, but want to ensure the correct dependencies are used by building the binary inside a Docker container, then go ahead to the section on building the Evmos binary with Docker.

note

The given instructions have been tested on Ubuntu 18.04.2 LTS with Docker 20.10.2 and macOS 13.2.1 with Docker 20.10.22.

Prerequisites

General Setup

In order to build Evmos binaries with Docker, it is necessary to

  • clone the Evmos repository to your local machine (e.g. git clone [email protected]/evmos/evmos.git)
  • checkout the commit, branch, or release tag you want to build (e.g. git checkout v11.0.2)

Building A Docker Image Containing The Binary

To build a Docker image, that contains the Evmos binary, step into the cloned repository and run the following command in a terminal session:

make build-docker

This will create an image with the name tharsishq/evmos and the version tag latest. Now it is possible to run the evmosd binary in the container, e.g. evaluating its version:

docker run -it --rm tharsishq/evmos:latest evmosd version

Building The Binary With Docker

It is possible to build the evmosd binary deterministically using Docker. The container system that Docker provides offers the ability to create an instance of the Evmos binary in an isolated environment.

Building the Image

Run the following command to launch a build for all supported architectures (currently linux/amd64):

make distclean build-reproducible

The build system generates both the binaries and deterministic build report in the artifacts directory. The artifacts/build_report file contains the list of the build artifacts and their respective checksums, and can be used to verify build sanity. An example of its contents follows:

App: evmosd
Version: 11.0.2
Commit: 8eeeac7ae42a5b2695fea7f56868f3c6e9bc2378
Files:
6b5939adfd9a8ce964d78fcaab16091a evmosd-11.0.2-linux-amd64
ac503925c535ddb8ee0fbebbb96d0eb9 evmosd-11.0.2.tar.gz
Checksums-Sha256:
0857d59c285a87b7d354aa6d566db90c56663d938a88d41d35415da490708aea evmosd-11.0.2-linux-amd64
5005814fc34abc02d7e30dcfbe67e363c1b593efb774e0c97ebb7ec713baf306 evmosd-11.0.2.tar.gz

Builder Image

The Tendermint rbuilder Docker image provides a deterministic build environment that is used to build Cosmos SDK applications. It provides a way to be reasonably sure that the executables are really built from the git source. It also makes sure that the same, tested dependencies are used and statically built into the executable.


Now that you have built the Evmos binary, either for local use or in a Docker container, you'll find information to run a node instance in the following section on setting up a local network.