Consul B-Sides demo

.Consul B-Sides

Recording of this webinar can be found here - https://www.hashicorp.com/resources/consul-b-sides-exploring-powerful-features

10_consul_template_daemon.sh

#!/bin/bash

consul-template -template "index.ctmpl:index.html:echo New webpage generated" -log-level=err

1_start_consul.sh

#!/bin/bash

consul agent -dev -config-file=./consul.json

2_populate_kv.sh

#!/bin/bash

consul kv put service/http/port 80
consul kv put service/http/log_dir "/var/log/httpd/access_log"

consul kv put website/title "Dynamic configuration with Consul"
consul kv put website/content "Consul-Template is great!"

3_blocking_query.sh

#!/bin/bash

echo "HTTP port"
curl -s http://localhost:8500/v1/kv/service/http/port | jq

echo
index=$(curl -s http://localhost:8500/v1/kv/service/http/port | jq -r ".[].ModifyIndex")

echo "Waiting for changes"
curl -s http://localhost:8500/v1/kv/service/http/port?index=$index | jq

4_watch_key.sh

#!/bin/bash

echo "Watching for changes to log_dir"
consul watch -type=key -key=service/http/log_dir "jq -r .Value | base64 -D && echo"

5_watch_event.sh

#!/bin/bash

echo "Creating event"
consul event -name broadcast "Sample Payload"

sleep 3

consul watch -type=event -name=broadcast jq 

6_lock_single.sh

#!/bin/bash

for i in {1..5}
do
  consul lock service/http/lock "echo Process $i has the lock && sleep 10 && echo Process $i has released the lock" &
done

wait

7_lock_multiple.sh

#!/bin/bash

for i in {1..5}
do
  consul lock -n=2 service/http/lock "echo Process $i has the lock && sleep 10 && echo Process $i has released the lock" &
done

wait

8_exec.sh

#!/bin/bash

echo "Checking uptime"
consul exec uptime
echo

sleep 5

echo "Pinging Google DNS"
consul exec ping -c 5 8.8.8.8
echo

sleep 5

echo "Storing uptimes in K/V store"
consul exec 'consul kv put machines/$(hostname)/uptime "$(uptime)"'

9_consul_template.sh

#!/bin/bash

consul-template -template "index.ctmpl:index.html:echo New webpage generated" -log-level=err -once

consul.json

{
  "disable_remote_exec": false
}

index.ctmpl

<h1>{{ key "website/title" }}</h1>
<p>We have a great webpage for you!</p>
<p>{{ key "website/content" }}</p>