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#!/usr/bin/env bash |
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# Expects one argument the name of the production stack file |
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# |
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# Requires these environment variables to be set |
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# |
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# CLOUDFLARE_DOMAIN - root domain of your app, e.g. example.com |
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# CLOUDFLARE_KEY - your Cloudflare API key |
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# CLOUDFLARE_EMAIL - your Cloudflare email address e.g. [email protected] |
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# PROJECT_NAME - a short name for your project e.g. example |
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# TUTUM_USERNAME - your Tutum username |
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# TUTUM_PASSWORD - your Tutum password |
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# CLUSTER_SIZE - the initial cluster size (default 1) |
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# |
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# NB: The script assumes you have a loadbalancer service within your stack called 'lb' |
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# You should have created a node cluster called ${PROJECT_NAME} |
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# It is assumed that you normally have one node in the cluster and expand to 2 during deployment. |
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set -eu |
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cd $(dirname $0) |
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cluster_normal_size=${CLUSTER_SIZE:-1} |
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cluster_expanded_size=$(( cluster_normal_size * 2 )) |
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project=${PROJECT_NAME} |
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state= |
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alt_state= |
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if ! which tutum |
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then |
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echo "Please install Tutum CLI using 'sudo -H pip install tutum'" |
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exit 1 |
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fi |
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if ! which cfcli |
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then |
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echo "Please install Cloudflare CLI using 'npm install -g cloudflare-cli'" |
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exit 1 |
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fi |
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if (( $# == 0)) |
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then |
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echo "Usage: $0 <stack-file>" |
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exit 1 |
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fi |
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echo "Logging in to Tutum" |
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tutum login -u $TUTUM_USERNAME -p $TUTUM_PASSWORD |
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echo "Scaling out for blue/green deployment" |
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tutum nodecluster scale --sync ${project} ${cluster_expanded_size} |
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if tutum stack list | grep ${project}-blue | grep Running |
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then |
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echo "Current state is blue" |
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state=blue |
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alt_state=green |
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else |
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echo "Current state is green" |
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state=green |
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alt_state=blue |
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fi |
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while tutum stack list | grep ${project}-${alt_state} | grep -v Terminated |
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do |
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echo "Terminating exisiting ${alt_state} deployment" |
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if tutum stack terminate --sync ${project}-${alt_state} |
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then |
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echo "Terminated" |
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else |
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sleep 20 |
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fi |
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done |
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echo "Starting new ${alt_state} deployment" |
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tutum stack up -n ${project}-${alt_state} --sync -f $1 |
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echo "Changing DNS" |
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#Change DNS |
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cfcli --token ${CLOUDFLARE_KEY} --email ${CLOUDFLARE_EMAIL} --domain ${CLOUDFLARE_DOMAIN} --type cname -ttl 120 editrecord ${CLOUDFLARE_DOMAIN} lb.${project}-${alt_state}.${TUTUM_USERNAME}.svc.tutum.io |
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echo "Awaiting DNS propagation" |
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#Wait for DNS change over, we use a fixed time here as we have to wait for all cached DNS records to change before continuing |
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sleep 240 |
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echo "Terminating exisiting ${state} deployment" |
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tutum stack terminate --sync ${project}-${state} |
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echo "Shrinking back cluster after deployment" |
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tutum nodecluster scale --sync ${project} ${cluster_normal_size} |
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