hapi 17.8 (nodeJS 10.3) container + MongoDB 4.0 container

• video: https://www.youtube.com/watch?v=gqQ_bPn8niY

• you need the nodeJS and mongo containers (you can pull them)

  • docker pull mongo
  • docker pull ubuntu - then i installed nodejs & npm but you can pull nodejs directly too

• and files from this repo

Important steps for run nodeJS container

• You must run download the packages with npm which was used in package.json

  • npm install

• you must have a docker network, which you can create in host machine with a single line:

  • sudo docker network create mynetwork

• you must give permission for start.sh in project root and to mongoDB folder

  • sudo chmod 777 start.sh
  • ofc also you must have the volume folders

• create entry point or launch manually the nodeJS app (ex. manually)

  • cd /home/project
  • node index
  • (optional: you can use nodemon for run hapi server, if you are in project folder, type "nodemon")

How it work:

• we have 2 container:
  • only nodejs (and we have shared folder with project files)
    • we need use volume, so our external folder inject into container, so we use ide outside but code will be executed inside, like shared folder
  • only mongoDB (it was pulled from docker repo)
    • we need volume/shared folder for save the data into host machine folder
      • keep in mind, the host folder will replace the folder from image when you run container !!
    • somehow not let me declare the entrypoint directly so i created a bashfile, mounted and used the .sh like entrypoint
    • first time you need create db, collection, something data for test
• the 2 container must communicate with eachother, this have more way but we use same network
  • it is simliar like the lan, the containers can see eachother with different ip
  • bonus is the container alias which is fixed, so we don't need to know the ip (which not static)
    • example from nodejs you can run this: ping mongo
  • so nodejs via mongoose module can access the mongodb from mongo container
    • ofc mongodb must run with bind all ip param:
      • ex.: /usr/bin/mongod --bind_ip_all

Other helpful information

Docker

• ip addr show = need package: iproute
• --privileged = if cannot access the host network from container, need run container with this flag
• ping x.y.z.v = need package: iputils-ping
• sudo docker exec -it mongo /bin/bash = enter into deattached container and use terminal
• /usr/bin/mongo = enter to mongo console/terminal
• use ssh for check files or transfer between host & docker container
  • Note: if you want keep file permanent in your container then you have more option:
    • sudo docker commit containerHash imageName - this create a new image from container current state
    • use volume (-v) when you run your container and file should be stored in host machine
• copy something out from container:
  • Docker container:
    • passwd root = change the password for root
    • apt-get update = update the repositories
    • apt-get install nano = my favorite text editor
    • apt-get install openssh-server = install ssh server
    • nano /etc/ssh/sshd_config = open ssh config file for editing
      • change value at PermitRootLogin line to yes
      • save
    • service ssh restart = restart ssh server so it will use the new config
    • ip addr show = check your ip (at me useally 172.17.0.2 but not static)
  • Host machine:
    • install winSCP - https://winscp.net/eng/download.php (100% compatibile with wine - linux users)
    • connect to docker:
      • host: ip what you got from ip addr show
      • type: sftp & port: 22
      • username: root
      • password: what you setted with passwd root
  • when you are done then just exit from container, so it will be cleanup changes on container at next container run

Hapi - NodeJS

• inert: used for return static files from filesystem
• vision: let us to use template engines easier at response
• handlebar: javascript based template engine
• mongoose: elegant MongoDB object modeling for nodeJS

MongoDB

• mongo - this start the mongo console where you can type commands for mongo, located in usr/bin
• mongos - mongodb shard, is a routing service for MongoDB shard configurations, located in usr/bin
• mongod - this start the database in image, located in usr/bin
• show dbs - obvious :D
• use hapidb - create new /select database (name: hapidb)
• db.createCollection('tasks'); = create collection (name tasks) in current db (hapidb)
• db.tasks.insert({text:'Task 1'}); = insert a new object into the colllection(tasks)
• db.tasks.insertMany([{text:'Task 1'},{text:'Task 2'}]); = insert more document into collection
• db.tasks.updateOne({ "favorites.artist": "Picasso" },{$set: { "favorites.food": "pie", type: 3 },$currentDate: { lastModified: true }}) = update the 1st (condition, set which will be updated,update lastModified field)
• db.task.update() = same than above, update the 1st method
• db.task.updateMany() = same like updateOne except this update every record
• db.collection.replaceOne({ name: "abc" },{ name: "amy", age: 34, type: 2}) = replce first document where name is "abc"
• db.tasks.find() = list records in tasks collection
• db.tasks.find(idHash) = find that id in collection
• db.tasks.remove( { status: "D" }, 1) = remove 1 record where status is "D"
• db.tasks.remove( { status: "D" } ) = remove every record where status is "D"
• db.tasks.remove( {} ) = remove every document from collection
• db.tasks.deleteOne( { status: "D" } ) = delete first record where status is "D"
• db.tasks.deleteMany( { status: "D" } ) = delete every record where status is "D"
• db.tasks.deleteMany({}) = delete every document from collection
• db.tasks.save() = save current document object
• db.tasks.drop() = remove the collection (tasks)
• other usefull stuff: findAndModify, findOneAndReplace(), findOneAndUpdate(), Geospatial Queries, copyTo, cloneCollection(), cloneDatabase()..........

Helpful link

few thing outdated in that guide like happi connection, handle which use mongodb etc but could be a good start

• https://www.youtube.com/watch?v=2lprC0yYeFw
• https://www.npmjs.com/package/hapi-auth-jwt2
• https://github.com/hapijs/hapi-auth-cookie
• https://medium.freecodecamp.org/how-to-setup-a-powerful-api-with-nodejs-graphql-mongodb-hapi-and-swagger-e251ac189649
• https://docs.mongodb.com/v3.2/reference/sql-comparison/
• https://docs.mongodb.com/v3.2/tutorial/update-documents/
• https://www.tutorialspoint.com/mongodb/mongodb_environment.htm
• https://mongoosejs.com/
• https://success.docker.com/article/how-can-i-access-mongodb-container-from-another-container
• https://github.com/hapijs/vision
• https://hapijs.com/tutorials/serving-files