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#!/bin/bash
# Startup script that initializes a grpc-dev GCE machine.
#
# A grpc-docker GCE machine is based on docker container image.
#
# On startup, it copies the grpc dockerfiles to a local directory, and update its address
# so that the docker containers within it have git-on-borg-access.
# _load_metadata curls a metadata url
_load_metadata() {
local metadata_root=http://metadata/computeMetadata/v1
local uri=$1
[[ -n $uri ]] || { echo "missing arg: uri" >&2; return 1; }
if [[ $uri =~ ^'attributes/' ]]
then
for a in $(curl -H "X-Google-Metadata-Request: True" $metadata_root/instance/attributes/)
do
[[ $uri =~ "/$a"$ ]] && { curl $metadata_root/instance/$uri -H "X-Google-Metadata-Request: True"; return; }
done
fi
# if the uri is a full request uri
[[ $uri =~ ^$metadata_root ]] && { curl $uri -H "X-Google-Metadata-Request: True"; return; }
}
_source_gs_script() {
local script_attr=$1
[[ -n $script_attr ]] || { echo "missing arg: script_attr" >&2; return 1; }
local gs_uri=$(_load_metadata "attributes/$script_attr")
[[ -n $gs_uri ]] || { echo "missing metadata: $script_attr" >&2; return 1; }
local out_dir='/var/local/startup_scripts'
local script_path=$out_dir/$(basename $gs_uri)
mkdir -p $out_dir
gsutil cp $gs_uri $script_path || {
echo "could not cp $gs_uri -> $script_path"
return 1
}
chmod a+rwx $out_dir $script_path
source $script_path
}
main() {
local script_attr='shared_startup_script_url'
_source_gs_script $script_attr || {
echo "halting, script 'attributes/$script_attr' could not be sourced"
return 1
}
grpc_dockerfile_pull
chmod -R a+rw /var/local/dockerfile
# Install git and emacs
apt-get update && apt-get install -y git emacs || return 1
# Enable access to git repos on git-on-borg
local git_root='/var/local/git'
install_gob_daemon $git_root/gerrit-gcompute-tools || return 1
# Startup the docker registry
grpc_docker_launch_registry && grpc_docker_pull_known
# Add a sentinel file to indicate that startup has completed.
local sentinel_file=/var/log/GRPC_DOCKER_IS_UP
touch $sentinel_file
}
set -x
main "$@"
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