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deploy.sh
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deploy.sh
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#!/usr/bin/env bash
# more bash-friendly output for jq
JQ="jq --raw-output --exit-status"
configure_aws_cli(){
aws --version
aws configure set default.region eu-west-1 # change this if your AWS region differs
aws configure set default.output json
}
deploy_cluster() {
family="film_ratings_app"
make_task_def
register_definition
if [[ $(aws ecs update-service --cluster film_ratings_cluster --service film_ratings_app_service --task-definition $revision | \
$JQ '.service.taskDefinition') != $revision ]]; then
echo "Error updating service."
return 1
fi
# wait for older revisions to disappear
# not really necessary, but nice for demos
for attempt in {1..15}; do
if stale=$(aws ecs describe-services --cluster film_ratings_cluster --services film_ratings_app_service | \
$JQ ".services[0].deployments | .[] | select(.taskDefinition != \"$revision\") | .taskDefinition"); then
echo "Waiting for stale deployments:"
echo "$stale"
sleep 45
else
echo "Deployed!"
return 0
fi
done
echo "Service update took too long."
return 1
}
make_task_def(){
task_template='[
{
"name": "film_ratings_app",
"image": "%s:%s",
"essential": true,
"portMappings": [
{
"containerPort": 3000,
"hostPort": 3000
}
],
"environment": [
{
"name": "DB_HOST",
"value": "%s"
},
{
"name": "DB_PASSWORD",
"value": "%s"
}
],
"logConfiguration": {
"logDriver": "awslogs",
"options": {
"awslogs-group": "film_ratings_app",
"awslogs-region": "eu-west-1",
"awslogs-stream-prefix": "ecs"
}
},
"memory": 1024,
"cpu": 256
}
]'
task_def=$(printf "$task_template" $IMAGE_NAME $CIRCLE_TAG $DB_HOST $DB_PASSWORD)
}
register_definition() {
if revision=$(aws ecs register-task-definition --container-definitions "$task_def" --family $family | $JQ '.taskDefinition.taskDefinitionArn'); then
echo "Revision: $revision"
else
echo "Failed to register task definition"
return 1
fi
}
configure_aws_cli
deploy_cluster