By Sumathi Kuppusamy,Alibaba Cloud Tech Share Author
MEAN stack is one of the modern web application javascript framework that’s rapidly improving and easy to collaborate and learn. The MEAN Stack contains, from backend to frontend, a schemaless NoSQL database (MongoDB), a server-side JavaScript platform (Node.js), a web application framework running on Node.js to make it easier to write apps (Express.js), and a frontend client-side framework that runs in the browser (AngularJS).
In this article, we will walk through the steps to deploy MEAN stack on CentOS 7.2 deployed in Alibaba Cloud ECS.
Let us look at the steps in detail to deploy MEAN stack on an Alibaba Cloud ECS instance with CentOS 7.2.
NodeJS is one of the faster way to build scalable network application. In order to install nodeJS, run the following commands on CentOS 7:
curl -sL https://rpm.nodesource.com/setup_4.x
yum install -y nodejs
Sample output:
MongoDB is the leading NoSQL database service. We will now install it on our ECS instance.
cat > /etc/yum.repos.d/mongodb.repo
[mongodb]
name=MongoDB Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/
gpgcheck=0
enabled=1
Press Ctrl+D to save and exit.
yum install -y mongodb-org
● Start the mongod service in noauth mode following the below command:
mongod –fork –dbpath /var/lib/mongo –logpath /var/log/meandb.log
Note: The default dbpath is /var/lib/mongo
● Create the admin user by going to mongo shell by typing “mongo” in terminal and feed in the below commands in mongo shell:
mongo
use admin
db.createUser({user:‘siteUserAdmin’,pwd:‘pa55w0rd’,roles:[{role:‘userAdminAnyDatabase’,db:‘admin’}]})
Enter the command “exit” when complete to exit from the mongo shell.
● Now stop the mongod service.
mongod –shutdown –dbpath /var/lib/mongo
● Now start the mongod service in -auth mode
mongod –fork –auth –dbpath /var/lib/mongo –logpath /var/log/meandb.log
● Create a user for your mongo collection (new-mean) by going to mongo shell in the terminal and feed in the below commands in mongo shell. You need to login to your MongoDB account by using the “-u” and “-p” commands:
mongo -u siteUserAdmin -p pa55word --authenticationDatabase admin
use new-mean;
db.createUser({user:'meanuser',pwd:'pa55w0rd',roles:[{role:'readWrite',db:'new-mean'}]})
Enter the command “exit” when complete to exit from the mongo shell.
Note: In this example, we have used the following username and passwords. For your environment, use appropriate password of your choice.
Database | Username | Password |
admin | siteUserAdmin | pa55word |
new-mean | meanuser | pa55w0rd |
yum install -y gitb. Install bower and gulp packages In order to bring up the MEAN stack, package managers such as npm, bower, gulp need to be installed. Bower is the package manager for web components. Install these dependencies by running the following commands: ●
sudo npm install -g bower●
sudo npm install -g gulpNote: ●“-g” flag is important to ensure that bower and gulp are installed globally. ●If you encounter the below error “npm: relocation error: npm: symbol SSL_set_cert_cb, version libssl.so.10 not defined in file libssl.so.10 with link time reference”, please run the following command and then re-run the above commands.
yum update -y opensslOutput:
git clone https://github.com/linnovate/mean.git
cd mean(Optional) You can inspect the directory structure of mean by using the command “ls”: The package.json file describes dependencies for AngularJS, Web Components and NodeJS. MEAN uses the https://webpack.github.io/”>webpack for bundling web assets. b. Install mean project packages by running the following command:
npm installNote: This may take few seconds to complete. c. Configure MONGO_HOST settings in server-start.js to connect to mongo server using the created user meanuser. You can use one of the text editor ‘vi’ or ‘nano’:
nano server-start.jsChange the line containing “MONGO_HOST”: process.env.MONGO_HOST='mongodb://localhost/new-mean' To process.env.MONGO_HOST='mongodb://meanuser@pa55w0rd@localhost/new-mean' c. Start the mean service with production mode
export NODE_ENV=production npm start
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