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#!/bin/bash
# Copyright 2017 AT&T Intellectual Property, Inc
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#. What this is: Deployment script for a mult-node docker-ce cluster.
#. Prerequisites:
#. - Ubuntu server for master and worker nodes
#. Usage:
#. $ git clone https://gerrit.opnfv.org/gerrit/models ~/models
#. $ cd ~/models/tools/docker
#.
#. Usage:
#. $ bash docker_cluster.sh all <master> "<workers>"
#. Automate setup and start demo services.
#. <master>: master node IPs
#. <workers>: space-separated list of worker node IPs
#. $ bash docker_cluster.sh setup <master> "<workers>"
#. Installs and starts master and worker nodes.
#. $ bash docker_cluster.sh create <service>
#. <service>: Demo service name to start.
#. Currently supported: nginx
#. $ bash docker_cluster.sh delete <service>
#. <service>: Service name to delete.
#. $ bash docker_cluster.sh clean [<node>]
#. <node>: optional IP address of node to clean.
#. By default, cleans the entire cluster.
#.
function log() {
f=$(caller 0 | awk '{print $2}')
l=$(caller 0 | awk '{print $1}')
echo "$f:$l ($(date)) $1"
}
# Setup master and worker hosts
function setup() {
# Per https://docs.docker.com/engine/swarm/swarm-tutorial/
cat >~/tmp/env.sh <<EOF
master=$1
workers="$2"
EOF
source ~/tmp/env.sh
cat >~/tmp/prereqs.sh <<'EOF'
#!/bin/bash
# Per https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/
sudo apt-get remove -y docker docker-engine docker.io docker-ce
sudo apt-get update
sudo apt-get install -y \
linux-image-extra-$(uname -r) \
linux-image-extra-virtual
sudo apt-get install -y \
apt-transport-https \
ca-certificates \
curl \
software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
sudo apt-get update
sudo apt-get install -y docker-ce
EOF
# jq is used for parsing API reponses
sudo apt-get install -y jq
scp -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ~/tmp/prereqs.sh ubuntu@$master:/home/ubuntu/prereqs.sh
ssh -x -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ubuntu@$master bash /home/ubuntu/prereqs.sh
# activate docker API
# Per https://www.ivankrizsan.se/2016/05/18/enabling-docker-remote-api-on-ubuntu-16-04/
ssh -x -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ubuntu@$master <<EOF
sudo sed -i -- 's~fd://~fd:// -H tcp://0.0.0.0:4243~' /lib/systemd/system/docker.service
sudo systemctl daemon-reload
sudo service docker restart
# Activate swarm mode
# Per https://docs.docker.com/engine/swarm/swarm-tutorial/create-swarm/
sudo docker swarm init --advertise-addr $master
EOF
if ! curl http://$master:4243/version ; then
log "docker API failed to initialize"
exit 1
fi
# Per https://docs.docker.com/engine/swarm/swarm-tutorial/add-nodes/
token=$(ssh -o StrictHostKeyChecking=no -x ubuntu@$master sudo docker swarm join-token worker | grep docker)
for worker in $workers; do
log "setting up worker at $worker"
scp -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ~/tmp/prereqs.sh ubuntu@$worker:/home/ubuntu/.
ssh -x -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ubuntu@$worker bash /home/ubuntu/prereqs.sh
ssh -x -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no ubuntu@$worker sudo $token
done
log "testing service creation"
reps=1; for a in $workers; do ((reps++)); done
create_service nginx $reps
}
function create_service() {
log "creating service $1 with $2 replicas"
# sudo docker service create -p 80:80 --replicas $reps --name nginx nginx
# per https://docs.docker.com/engine/api/v1.27/
source ~/tmp/env.sh
case "$1" in
nginx)
match="Welcome to nginx!"
;;
*)
log "service $1 not setup for use with this script"
esac
if ! curl -X POST http://$master:4243/services/create -d @$1.json ; then
log "service creation failed"
exit 1
fi
check_service $1 $match
}
function check_service() {
log "checking service state for $1 with match string $2"
source ~/tmp/env.sh
service=$1
match="$2"
services=$(curl http://$master:4243/services)
n=$(echo $services | jq '. | length')
((n--))
while [[ $n -ge 0 ]]; do
if [[ $(echo $services | jq -r ".[$n].Spec.Name") == $service ]]; then
id=$(echo $services | jq -r ".[$n].ID")
port=$(echo $services | jq -r ".[$n].Endpoint.Ports[0].PublishedPort")
nodes="$master $workers"
for node in $nodes; do
not=""
while ! curl -s -o ~/tmp/resp http://$node:$port ; do
log "service is not yet active, waiting 10 seconds"
sleep 10
done
curl -s -o ~/tmp/resp http://$node:$port
if [[ $(grep -c "$match" ~/tmp/resp) == 0 ]]; then
not="NOT"
fi
echo "$service service is $not active at address http://$node:$port"
done
break
fi
((n--))
done
}
function delete_service() {
log "deleting service $1"
source ~/tmp/env.sh
service=$1
services=$(curl http://$master:4243/services)
n=$(echo $services | jq '. | length')
((n--))
while [[ $n -ge 0 ]]; do
if [[ $(echo $services | jq -r ".[$n].Spec.Name") == $service ]]; then
id=$(echo $services | jq -r ".[$n].ID")
if ! curl -X DELETE http://$master:4243/services/$id ; then
log "failed to delete service $1"
else
log "deleted service $1"
fi
break
fi
((n--))
done
}
# Clean the installation
function clean() {
source ~/tmp/env.sh
nodes="$master $workers"
for node in $nodes; do
ssh -o StrictHostKeyChecking=no -x ubuntu@$node <<EOF
sudo docker swarm leave --force
sudo systemctl stop docker
sudo apt-get remove -y docker-ce
EOF
done
}
export WORK_DIR=$(pwd)
case "$1" in
setup)
setup $2 "$3"
;;
ceph)
# TODO Ceph support for docker, e.g. re
# http://docker.com/docs/docker/latest/en/docker-services/storage-service/
# https://github.com/docker/docker/issues/8722
# setup_ceph "$2" $3 $4 $5
;;
all)
start=`date +%s`
setup $2 "$3"
end=`date +%s`
runtime=$((end-start))
runtime=$((runtime/60))
log "Demo duration = $runtime minutes"
;;
create)
create_service "$2" $3
;;
delete)
delete_service "$2"
;;
clean)
clean $2
;;
*)
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then grep '#. ' $0; fi
esac
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