Dockerfile

FROM alpine:3.21.0

ENV VERSION v3.17.0-rc.1

MAINTAINER Trevor Hartman <trevorhartman@gmail.com>

WORKDIR /

# Enable SSL
RUN apk --update add ca-certificates wget python3 curl tar jq

# Install gcloud and kubectl
# kubectl will be available at /google-cloud-sdk/bin/kubectl
# This is added to $PATH
ENV HOME /
ENV PATH /google-cloud-sdk/bin:$PATH
ENV CLOUDSDK_PYTHON_SITEPACKAGES 1
RUN wget https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-cli-linux-x86_64.tar.gz && tar -xf google-cloud-cli-linux-x86_64.tar.gz && rm google-cloud-cli-linux-x86_64.tar.gz
RUN google-cloud-sdk/install.sh --usage-reporting=true --path-update=true --bash-completion=true --rc-path=/.bashrc --additional-components app kubectl alpha beta
# Disable updater check for the whole installation.
# Users won't be bugged with notifications to update to the latest version of gcloud.
RUN google-cloud-sdk/bin/gcloud config set --installation component_manager/disable_update_check true

# Install Helm
ENV FILENAME helm-${VERSION}-linux-amd64.tar.gz
ENV HELM_URL https://get.helm.sh/${FILENAME}

RUN echo $HELM_URL

RUN curl -o /tmp/$FILENAME ${HELM_URL} \
  && tar -zxvf /tmp/${FILENAME} -C /tmp \
  && mv /tmp/linux-amd64/helm /bin/helm \
  && rm -rf /tmp

# Helm plugins require git
# helm-diff requires bash, curl
RUN apk --update add git bash

# Install envsubst [better than using 'sed' for yaml substitutions]
ENV BUILD_DEPS="gettext"  \
    RUNTIME_DEPS="libintl"

RUN set -x && \
    apk add --update $RUNTIME_DEPS && \
    apk add --virtual build_deps $BUILD_DEPS &&  \
    cp /usr/bin/envsubst /usr/local/bin/envsubst && \
    apk del build_deps

# Install Helm plugins
# workaround for an issue in updating the binary of `helm-diff`
ENV HELM_PLUGIN_DIR /.helm/plugins/helm-diff
# Plugin is downloaded to /tmp, which must exist
RUN mkdir /tmp
RUN helm plugin install https://github.com/viglesiasce/helm-gcs.git
RUN helm plugin install https://github.com/databus23/helm-diff

# Install vals tool
ENV VALS_VERSION=0.25.0
ENV VALS_URL=https://github.com/variantdev/vals/releases/download/v${VALS_VERSION}/vals_${VALS_VERSION}_linux_amd64.tar.gz
RUN curl -sL ${VALS_URL} | tar zx -C /usr/local/bin vals