foo.sh

#! /bin/sh
setup_autoregister_properties_file_for_elastic_agent() {
  echo "agent.auto.register.key=${GO_EA_AUTO_REGISTER_KEY}" >> $1
  echo "agent.auto.register.environments=${GO_EA_AUTO_REGISTER_ENVIRONMENT}" >> $1
  echo "agent.auto.register.elasticAgent.agentId=${GO_EA_AUTO_REGISTER_ELASTIC_AGENT_ID}" >> $1
  echo "agent.auto.register.elasticAgent.pluginId=${GO_EA_AUTO_REGISTER_ELASTIC_PLUGIN_ID}" >> $1
  echo "agent.auto.register.hostname=${AGENT_AUTO_REGISTER_HOSTNAME}" >> $1

  export GO_SERVER_URL="${GO_EA_SERVER_URL}"
  # unset variables, so we don't pollute and leak sensitive stuff to the agent process...
  unset GO_EA_AUTO_REGISTER_KEY GO_EA_AUTO_REGISTER_ENVIRONMENT GO_EA_AUTO_REGISTER_ELASTIC_AGENT_ID GO_EA_AUTO_REGISTER_ELASTIC_PLUGIN_ID GO_EA_SERVER_URL AGENT_AUTO_REGISTER_HOSTNAME
}

setup_autoregister_properties_file() {
  if [ -n "$GO_EA_SERVER_URL" ]; then
    setup_autoregister_properties_file_for_elastic_agent "$1"
    try chown go:go $1
  fi
}

(
mkdir -p /usr/local/sbin
wget https://github.com/tianon/gosu/releases/download/1.10/gosu-amd64 -O /usr/local/sbin/gosu
chmod 0755 /usr/local/sbin/gosu
chown root:root /usr/local/sbin/gosu
apk --no-cache upgrade
apk add --no-cache openjdk8-jre-base git mercurial subversion openssh-client bash curl
curl --fail --location --silent --show-error "https://download.gocd.org/binaries/17.12.0-5626/generic/go-agent-17.12.0-5626.zip" > /tmp/go-agent.zip
unzip /tmp/go-agent.zip -d /
mv go-agent-17.12.0 /go-agent
rm /tmp/go-agent.zip
mkdir -p /docker-entrypoint.d
mkdir -p /go-agent/config
setup_autoregister_properties_file "/go-agent/config/autoregister.properties"
/go-agent/agent.sh
)