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Demonstrating Swarm Mode under Azure Platform
Raw
gistfile1.txt
Contents:
1. Pre-requisite
2. Machine Setup
3. Setting up Master Node
4. Setting up Worker Nodes
5. Creating our First Service
6. Inspecting the Service
7. Scaling the Service
8. Creating a Nginx Service
9. verify the Nginx Page
10. Stopping all the swarm mode service in a single shot
11. Testing CloudYuga RSVP Application
12. Delete the RSVP service
13. Create the RSVP service with custom names
14. Demonstrating Rolling Updates
15. Demonstrating DAB and Docker Compose
16. Restricting Service to just one node
Pre-requisite:
==============
1. Login to Azure Platform.
2. We will create minimal of 5 swarm nodes(1 master & 4 worker nodes)
3. While creating Virtual Machine, select "Docker on Ubuntu Server" (It contains 1.12.3 and Ubuntu 16.04)
4. To make VM creation faster, select Password rather than Public Key for access.
5. Stick to particular Resource Group so that all our nodes communicates to each other.
Machine Setup:
===============
Master1 => master1-gilg2fp1.cloudapp.net
Node1 => node1-80tnhdo3.cloudapp.net
Node2 => node2-6g1dj2el.cloudapp.net
Node4 => node4-u3i88v60.cloudapp.net
Credential: <checkyouremail>
Setting Up Master Node:
=======================
ajeetraina@Master1:~$ sudo docker swarm init --advertise-addr 10.1.0.4
Swarm initialized: current node (dj89eg83mymr0asfru2n9wpu7) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-511d99ju7ae74xs0kxs9x4sco8t7awfoh99i0vwrhhwgjt11wi-d8y0tplji3z449ojrfgrrtgyc \
10.1.0.4:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
ajeetraina@Master1:~$
Setting up Worker Node:
=======================
Run the above command to connect worker nodes to manager one by one. This can also be automated(will touch later if needed).
Note: In case you loose your current session on Manager and want to know what token does manager posses in future, run the below command on the manager node:
ajeetraina@Master1:~$ sudo docker swarm join-token worker
To add a worker to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-511d99ju7ae74xs0kxs9x4sco8t7awfoh99i0vwrhhwgjt11wi-d8y0tplji3z449ojrfgrrtgyc \
10.1.0.4:2377
Result:
======
ajeetraina@Master1:~$ sudo docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
49fk9jibezh2yvtjuh5wlx3td Node2 Ready Active
aos67yarmj5cj8k5i4g9l3k6g Node1 Ready Active
dj89eg83mymr0asfru2n9wpu7 * Master1 Ready Active Leader
euo8no80mr7ocu5uulk4a6fto Node4 Ready Active
ajeetraina@Master1:~$
How to verify if your node is Worker Node?
==========================================
$sudo docker info
...
Swarm: active
NodeID: euo8no80mr7ocu5uulk4a6fto
Is Manager: false
Node Address: 10.1.0.7
Runtimes: runc
...
Let's start a service
=====================
ajeetraina@Master1:~$ sudo docker service create alpine ping 8.8.8.8
2ncblsn85ft2sgeh5frsj0n8g
ajeetraina@Master1:~$ sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
cc80ce569a94 alpine:latest "ping 8.8.8.8" 2 seconds ago Up Less than a second nauseous_stonebraker.1.6gcqr8d9brbf9lowgqpb4q6uo
ajeetraina@Master1:~$
How to query about service?
==========================
Syntax: sudo docker service ps <service-id>
Example:
ajeetraina@Master1:~$ sudo docker service ps 2ncb
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR
6gcqr8d9brbf9lowgqpb4q6uo nauseous_stonebraker.1 alpine Master1 Running Running 54 seconds ago
Alternative Method:
Syntax: sudo docker service ps <service-name>
ajeetraina@Master1:~$ sudo docker service ps nauseous_stonebraker
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR
6gcqr8d9brbf9lowgqpb4q6uo nauseous_stonebraker.1 alpine Master1 Running Running about a minute ago
ajeetraina@Master1:~$
Inspecting the Service:
======================
ajeetraina@Master1:~$ sudo docker service inspect 2ncb
[
{
"ID": "2ncblsn85ft2sgeh5frsj0n8g",
"Version": {
"Index": 27
},
"CreatedAt": "2016-11-16T10:59:10.462901856Z",
"UpdatedAt": "2016-11-16T10:59:10.462901856Z",
"Spec": {
"Name": "nauseous_stonebraker",
"TaskTemplate": {
"ContainerSpec": {
"Image": "alpine",
"Args": [
"ping",
"8.8.8.8"
]
},
"Resources": {
"Limits": {},
"Reservations": {}
},
"RestartPolicy": {
"Condition": "any",
"MaxAttempts": 0
},
"Placement": {}
},
"Mode": {
"Replicated": {
"Replicas": 1
}
},
"UpdateConfig": {
"Parallelism": 1,
"FailureAction": "pause"
},
"EndpointSpec": {
"Mode": "vip"
}
},
"Endpoint": {
"Spec": {}
},
"UpdateStatus": {
"StartedAt": "0001-01-01T00:00:00Z",
"CompletedAt": "0001-01-01T00:00:00Z"
}
}
]
ajeetraina@Master1:~$
Scaling the Service:
======================
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 1/1 alpine ping 8.8.8.8
ajeetraina@Master1:~$ sudo docker service scale nauseous_stonebraker=4
nauseous_stonebraker scaled to 4
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
ajeetraina@Master1:~$
8. Creating a Nginx Service:
===========================
ajeetraina@Master1:~$ sudo docker service create --name web --publish 80:80 --replicas 4 nginx
9xm0tdkt83z395bqfhjgwge3t
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 0/4 nginx
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 0/4 nginx
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 0/4 nginx
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 0/4 nginx
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 0/4 nginx
ajeetraina@Master1:~$ clear
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 2/4 nginx
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 2/4 nginx
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 3/4 nginx
ajeetraina@Master1:~$ sudo docker service ls
ID NAME REPLICAS IMAGE COMMAND
2ncblsn85ft2 nauseous_stonebraker 4/4 alpine ping 8.8.8.8
9xm0tdkt83z3 web 4/4 nginx
ajeetraina@Master1:~$ ^C
ajeetraina@Master1:~$
Verifying the Nginx Web Page:
===========================
ajeetraina@Master1:~$ sudo curl http://localhost
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
ajeetraina@Master1:~$
Stopping all the swarm mode service in a single shot
===================================================
sudo docker service rm $(docker service ls | awk '{print $1}')
Trying the https://gist.github.com/cloudyuga/4fab993afdc373a0a4c0c5ad2a7cb834 steps:
11. Testing CloudYuga RSVP Application
$docker network create --driver overlay rsvpnet
$docker service create --name mongodb -e MONGODB_DATABASE=rsvpdata --network rsvpnet mongo:3.3
$docker service create --name rsvp -e MONGODB_HOST=mongodb --publish 5000 --network rsvpnet teamcloudyuga/rsvpapp
12. Verifying it opens up on Web browser:
PLEASE ENSURE THAT YOU HAVE 30000 port open to access it under OS and CLoud Platform(both).
$ curl http://localhost:30000
<!doctype html>
<html>
<title>RSVP App!</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="/static/bootstrap.min.css">
<link rel="icon" href="https://raw.githubusercontent.com/cloudyuga/rsvpapp/master/static/cloudyuga.png" type="image/png" sizes="
16x16">
<script type="text/javascript" src= "/static/jquery.min.js"></script>
<script type="text/javascript" src= "/static/bootstrap.min.js"></script>
<body>
<div class="jumbotron">
<div class="container">
<div align="center">
<h2><a href="">CloudYuga<img src="https://raw.githubusercontent.com/cloudyuga/rsvpapp/master/static/cloudyuga.png"/>Garage RSVP!<
/a></h2>
<h3><font color="maroon"> Serving from Host: 75658e4fd141 </font>
<font size="8" >
13. Delete the RSVP service
$ docker service rm rsvp
14.Create the RSVP service with custom names
$ docker service create --name rsvp -e MONGODB_HOST=mongodb -e TEXT1="Docker Meetup" -e TEXT2="Bangalore" --publish 5000 --network rsvpnet teamcloudyuga/rsvpapp
15. Scale the RSVP service
$ docker service scale rsvp=5
16. keep refresing the RSVP frontend and watch the serving "host"
17. Demonstrating the rolling update
docker service update --image teamcloudyuga/rsvpapp:v1 --update-delay 10s rsvp
18. keep refreshing the RSVP frontend watch for changes
- "Name" should be converted into "Your Name".
Demonstrating DAB and Docker COmpose
$ mkdir cloudyuga
$ cd cloudyuga/
:~/cloudyuga$ docker-compose bundle -o cloudyuga.dab
WARNING: Unsupported top level key 'networks' - ignoring
Wrote bundle to cloudyuga.dab
:~/cloudyuga$ vi docker-compose.yml
:~/cloudyuga$ ls
cloudyuga.dab docker-compose.yml
cat cloudyuga.dab
{
"Services": {
"mongodb": {
"Env": [
"MONGODB_DATABASE=rsvpdata"
],
"Image": "mongo@sha256:08a90c3d7c40aca81f234f0b2aaeed0254054b1c6705087b10da1c1901d07b5d",
"Networks": [
"rsvpnet"
],
"Ports": [
{
"Port": 27017,
"Protocol": "tcp"
}
]
},
"web": {
"Env": [
"MONGODB_HOST=mongodb"
],
"Image": "teamcloudyuga/rsvpapp@sha256:df59278f544affcf12cb1798d59bd42a185a220ccc9040c323ceb7f48d030a75",
"Networks": [
"rsvpnet"
],
"Ports": [
{
"Port": 5000,
"Protocol": "tcp"
}
]
}
},
"Version": "0.1"
Scaling the Services:
====================
docker service ls
ID NAME REPLICAS IMAGE COMMAND
66kcl850fkkh cloudyuga_web 1/1 teamcloudyuga/rsvpapp@sha256:df59278f544affcf12cb1798d59bd42a185a220ccc9040c323ceb7f48d030a75
aesw4vcj1s11 cloudyuga_mongodb 1/1 mongo@sha256:08a90c3d7c40aca81f234f0b2aaeed0254054b1c6705087b10da1c1901d07b5d
aztab8c3r22c rsvp 5/5 teamcloudyuga/rsvpapp:v1
f4olzfoomu76 mongodb 1/1 mongo:3.3
16. Restricting service to node-1
===================================
$sudo dokcer node update --label-addtype=ubuntu node-1
master==>sudo docker service create --name mycloud --replicas 5 --network collabnet --constraint 'node.labels.type
== ubuntu' dockercloud/hello-world
0elchvwja6y0k01mbft832fp6
master==>sudo docker service ls
ID NAME REPLICAS IMAGE
COMMAND
0elchvwja6y0 mycloud 0/5 dockercloud/hello-world
66kcl850fkkh cloudyuga_web 3/3 teamcloudyuga/rsvpapp@sha256:df59278f544affcf12cb1798d59bd42a185a220ccc9
040c323ceb7f48d030a75
aesw4vcj1s11 cloudyuga_mongodb 1/1 mongo@sha256:08a90c3d7c40aca81f234f0b2aaeed0254054b1c6705087b10da1c1901d
07b5d
aztab8c3r22c rsvp 5/5 teamcloudyuga/rsvpapp:v1
f4olzfoomu76 mongodb 1/1 mongo:3.3
master==>sudo docker service ps mycloud
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR
a5t3rkhsuegf6mab24keahg1y mycloud.1 dockercloud/hello-world node-1 Running Running 5 seconds ago
54dfeuy2ohncan1sje2db9jty mycloud.2 dockercloud/hello-world node-1 Running Running 3 seconds ago
072u1dxodv29j6tikck8pll91 mycloud.3 dockercloud/hello-world node-1 Running Running 4 seconds ago
enmv8xo3flzsra5numhiln7d3 mycloud.4 dockercloud/hello-world node-1 Running Running 4 seconds ago
14af770jbwipbgfb5pgwr08bo mycloud.5 dockercloud/hello-world node-1 Running Running 4 seconds ago
master==>
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