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  1. Many container images use Alpine Linux as their base operating system. When you build your own container image, you include the installation of packages in a Dockerfile (Containerfile). While you can use the official container images for HashiCorp tools, you may need to build your own container image with additional dependencies to apply HashiCorp Terraform in a CI/CD pipeline, run HashiCorp Vault or Consul on a workload orchestrator, or deploy HashiCorp Boundary in containers. This post demonstrates how to install the official release binaries for HashiCorp tools on Alpine Linux for container images. We’re sharing these instructions because although HashiCorp supports official repositories for many operating systems and distributions, including various Linux distributions, Alpine Linux users must download the tools from precompiled binaries on the HashiCorp release site. The binaries are not available through Alpine Package Keeper. Build a container image You can download the binary for any HashiCorp tool on the HashiCorp release site. Use the release site to download a specific product and its version for a given operating system and architecture. For Alpine Linux, use the product binary compiled for Linux AMD64: FROM alpine:latest ARG PRODUCT ARG VERSION RUN apk add --update --virtual .deps --no-cache gnupg && \ cd /tmp && \ wget https://releases.hashicorp.com/${PRODUCT}/${VERSION}/${PRODUCT}_${VERSION}_linux_amd64.zip && \ wget https://releases.hashicorp.com/${PRODUCT}/${VERSION}/${PRODUCT}_${VERSION}_SHA256SUMS && \ wget https://releases.hashicorp.com/${PRODUCT}/${VERSION}/${PRODUCT}_${VERSION}_SHA256SUMS.sig && \ wget -qO- https://www.hashicorp.com/.well-known/pgp-key.txt | gpg --import && \ gpg --verify ${PRODUCT}_${VERSION}_SHA256SUMS.sig ${PRODUCT}_${VERSION}_SHA256SUMS && \ grep ${PRODUCT}_${VERSION}_linux_amd64.zip ${PRODUCT}_${VERSION}_SHA256SUMS | sha256sum -c && \ unzip /tmp/${PRODUCT}_${VERSION}_linux_amd64.zip -d /tmp && \ mv /tmp/${PRODUCT} /usr/local/bin/${PRODUCT} && \ rm -f /tmp/${PRODUCT}_${VERSION}_linux_amd64.zip ${PRODUCT}_${VERSION}_SHA256SUMS ${VERSION}/${PRODUCT}_${VERSION}_SHA256SUMS.sig && \ apk del .depsThe example Dockerfile includes build arguments for the product and version. Use these arguments to install the HashiCorp tool of your choice. For example, you can use this Dockerfile to create an Alpine Linux base image with Terraform version 1.7.2: docker build --build-arg PRODUCT=terraform \ --build-arg VERSION=1.7.2 \ -t joatmon08/terraform:test .You can run a container with the new Terraform base image and issue Terraform commands: $ docker run -it joatmon08/terraform:test terraform -help Usage: terraform [global options] [args] The available commands for execution are listed below. The primary workflow commands are given first, followed by less common or more advanced commands. Main commands: init Prepare your working directory for other commands validate Check whether the configuration is valid plan Show changes required by the current configuration apply Create or update infrastructure destroy Destroy previously-created infrastructure ## omitted for clarityThe example Dockerfile includes commands to download the release’s checksum and signature. Use the signature to verify the checksum and the checksum to validate the archive file. This workflow requires the gnupg package to verify HashiCorp’s signature on the checksum. The Dockerfile installs gnupg and deletes it after installing the release. While the example Dockerfile verifies and installs a product’s official release binary, it does not include dependencies to run the binary. For example, HashiCorp Nomad requires additional packages such as gcompat. Be sure to install any additional dependencies that your tools require in your container image before running a container for it. Learn more If you need to use a HashiCorp tool in your own container, download and unarchive the appropriate release binaries from our release site. Include verification of the signature and a checksum for the download to ensure its integrity. This installation and verification workflow applies to any Linux distribution that does not include HashiCorp software in its package repository. Review our official release channels to download and install HashiCorp products on other platforms and architectures. We release official container images for each product in DockerHub under the HashiCorp namespace. View the full article
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