Dockerfile

FROM alpine:3.6
MAINTAINER James Phillips <james@hashicorp.com> (@slackpad)

# This is the release of Consul to pull in.
ENV CONSUL_VERSION=1.0.0

# This is the release of https://github.com/hashicorp/docker-base to pull in order
# to provide HashiCorp-built versions of basic utilities like dumb-init and gosu.
ENV DOCKER_BASE_VERSION=0.0.4

# This is the location of the releases.
ENV HASHICORP_RELEASES=https://releases.hashicorp.com

# Create a consul user and group first so the IDs get set the same way, even as
# the rest of this may change over time.
RUN addgroup consul && \
    adduser -S -G consul consul

# Set up certificates, our base tools, and Consul.
RUN apk add --no-cache ca-certificates curl gnupg libcap openssl && \
    gpg --keyserver pgp.mit.edu --recv-keys 91A6E7F85D05C65630BEF18951852D87348FFC4C && \
    mkdir -p /tmp/build && \
    cd /tmp/build && \
    wget ${HASHICORP_RELEASES}/docker-base/${DOCKER_BASE_VERSION}/docker-base_${DOCKER_BASE_VERSION}_linux_amd64.zip && \
    wget ${HASHICORP_RELEASES}/docker-base/${DOCKER_BASE_VERSION}/docker-base_${DOCKER_BASE_VERSION}_SHA256SUMS && \
    wget ${HASHICORP_RELEASES}/docker-base/${DOCKER_BASE_VERSION}/docker-base_${DOCKER_BASE_VERSION}_SHA256SUMS.sig && \
    gpg --batch --verify docker-base_${DOCKER_BASE_VERSION}_SHA256SUMS.sig docker-base_${DOCKER_BASE_VERSION}_SHA256SUMS && \
    grep ${DOCKER_BASE_VERSION}_linux_amd64.zip docker-base_${DOCKER_BASE_VERSION}_SHA256SUMS | sha256sum -c && \
    unzip docker-base_${DOCKER_BASE_VERSION}_linux_amd64.zip && \
    cp bin/gosu bin/dumb-init /bin && \
    wget ${HASHICORP_RELEASES}/consul/${CONSUL_VERSION}/consul_${CONSUL_VERSION}_linux_amd64.zip && \
    wget ${HASHICORP_RELEASES}/consul/${CONSUL_VERSION}/consul_${CONSUL_VERSION}_SHA256SUMS && \
    wget ${HASHICORP_RELEASES}/consul/${CONSUL_VERSION}/consul_${CONSUL_VERSION}_SHA256SUMS.sig && \
    gpg --batch --verify consul_${CONSUL_VERSION}_SHA256SUMS.sig consul_${CONSUL_VERSION}_SHA256SUMS && \
    grep consul_${CONSUL_VERSION}_linux_amd64.zip consul_${CONSUL_VERSION}_SHA256SUMS | sha256sum -c && \
    unzip -d /bin consul_${CONSUL_VERSION}_linux_amd64.zip && \
    cd /tmp && \
    rm -rf /tmp/build && \
    apk del gnupg openssl && \
    rm -rf /root/.gnupg

# The /consul/data dir is used by Consul to store state. The agent will be started
# with /consul/config as the configuration directory so you can add additional
# config files in that location.
RUN mkdir -p /consul/data && \
    mkdir -p /consul/config && \
    chown -R consul:consul /consul

# Expose the consul data directory as a volume since there's mutable state in there.
VOLUME /consul/data

# Server RPC is used for communication between Consul clients and servers for internal
# request forwarding.
EXPOSE 8300

# Serf LAN and WAN (WAN is used only by Consul servers) are used for gossip between
# Consul agents. LAN is within the datacenter and WAN is between just the Consul
# servers in all datacenters.
EXPOSE 8301 8301/udp 8302 8302/udp

# HTTP and DNS (both TCP and UDP) are the primary interfaces that applications
# use to interact with Consul.
EXPOSE 8500 8600 8600/udp

# Consul doesn't need root privileges so we run it as the consul user from the
# entry point script. The entry point script also uses dumb-init as the top-level
# process to reap any zombie processes created by Consul sub-processes.
COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
ENTRYPOINT ["docker-entrypoint.sh"]

# By default you'll get an insecure single-node development server that stores
# everything in RAM, exposes a web UI and HTTP endpoints, and bootstraps itself.
# Don't use this configuration for production.
CMD ["agent", "-dev", "-client", "0.0.0.0"]