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[mesos/docker] Lazily pull images to speed up kube-up

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This commit is contained in:
Karl Isenberg 2015-08-21 12:08:16 -07:00
parent 251d98041e
commit 47d3d85603
1 changed files with 20 additions and 5 deletions
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25
cluster/mesos/docker/util.sh
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@ -56,6 +56,22 @@ function cluster::mesos::docker::docker_compose {
)
}
# Pull the images from a docker compose file, if they're not already cached.
# This avoid slow remote calls from `docker-compose pull` which delegates
# to `docker pull` which always hits the remote docker repo, even if the image
# is already cached.
function cluster::mesos::docker::docker_compose_lazy_pull {
for img in $(grep '^\s*image:\s' "${provider_root}/docker-compose.yml" | sed 's/[ \t]*image:[ \t]*//'); do
read repo tag <<<$(echo "${img} "| sed 's/:/ /')
if [ -z "${tag}" ]; then
tag="latest"
fi
if ! docker images "${repo}" | awk '{print $2;}' | grep -q "${tag}"; then
docker pull "${img}"
fi
done
}
# Run kubernetes scripts inside docker.
# This bypasses the need to set up network routing when running docker in a VM (e.g. boot2docker).
# Trap signals and kills the docker container for better signal handing
@ -252,12 +268,11 @@ function kube-up {
mkdir -p "${log_dir}"
rm -rf "${log_dir}"/*
if [ "${MESOS_DOCKER_SKIP_BUILD:-false}" != "true" ]; then
# Pull before `docker-compose up` to avoid timeouts between container runs.
# Pull before building images (but only if built) to avoid overwriting locally built images.
echo "Pulling docker images" 1>&2
cluster::mesos::docker::docker_compose pull
# Pull before `docker-compose up` to avoid timeouts caused by slow pulls during deployment.
echo "Pulling Docker images" 1>&2
cluster::mesos::docker::docker_compose_lazy_pull
if [ "${MESOS_DOCKER_SKIP_BUILD:-false}" != "true" ]; then
echo "Building Docker images" 1>&2
# TODO: version images (k8s version, git sha, and dirty state) to avoid re-building them every time.
"${provider_root}/km/build.sh"