Docker container Deployment attempt - Multi-container communication (Node + mongoDB + nginx)

Here’s why

To deploy a Mocker platform, I chose apI-Mocker, an off-the-shelf project, on the recommendation of a friend
The project is divided into server node, client Vue, and mongoDB database
When trying to deploy directly, I found the need to install a lot of environment, Node, Mongo, nginx ah, special trouble, before simple use of docker, JUST want to use docker free environment direct deployment? Hence the attempt

Multicontainer communication

The project is divided into three parts, so you need to create three containers (Node, Mongo, nginx)
How do containers communicate with each other?

 Create a connection using the link command
 $ docker run --name <Name> -d -p <path1>:<path2> --link <containerName>:<alias> <containerName:tag/imageID>
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- --link container connection instruction - < name > : < alias > - < name > : $curl <alias> - $curl <alias> - $curl <alias>Copy the code

Next, let’s try deployment

The implementation process

1, build mongo containers 2, build the node and establish connection with mongo container 3, build nginx containers with the node and connection is established

Build the Mongo container

Let’s take the Mongo image

    $ docker pull mongo:latest
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 $ docker images
 REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
 mongo               latest              05b3651ee24e        2 weeks ago         382MB
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Now let’s make this mirror image run

 $ docker run --name mock-mongo -d -p 27017:27017 mongo:latest --auth
 To create a file share with a local host, use the -v command
 # -v /data/db:/data/db
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— Auth command enables mongo connection authentication. This function is enabled because the server cannot connect to the Mongo database if the node does not set authentication when connecting across containers

```
 nodejs.MongoError: [egg-mongoose]Authentication failed.
```  
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Check the container

$ docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                      PORTS                      NAMES
0d440be90935        mongo               "Docker - entrypoint. S..."14 hours ago Up 14 hours 0.0.0.0:27017->27017/ TCP mock-mongoCopy the code

Since we have mongo authentication enabled, we need to enter the Mongo container and configure the account used to connect to Node

$ docker exec -it mock-mongo /bin/bash
$ mongo admin
Create manager user
$ db.createUser({user:"admin".pwd:"admin",roles:[{role:"dbAdmin",db:"admin"}]})
# Account authorization
$ db.auth('admin'.'admin')
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Now that our Mongo database is up and running, it’s time to create the Node container

Build the Node container and connect it to the Mongo container

The mongo container alias, port number, and login password should be agreed upon before building the Node container
- Mongo container alias: db
- Mongo port number: 27017
- Account password: admin: admin
Let’s start by modifying the node server configuration

File configuration dockerfile/API – mocker/server/config/config. The default. The js modified mongo connection configuration, the db for a mock – mongo container alias
```
  mongoose: {
    url: 'mongodb://admin:admin@db:27017/api-mock? authSource=admin'
  },
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```

Now we write a Dockerfile file to build the image

  # specify the base image
  FROM node:latest
    
  # maintainers
  MAINTAINER [email protected]
    
  # Working directory
  WORKDIR /www
    
  Copy the local file to the container without decompressing it
  COPY api-mocker node-server/api-mocker
    
  EXPOSE 7001
    
  WORKDIR /www/node-server/api-mocker/server
    
  RUN npm install
    
  WORKDIR /www/node-server/api-mocker
    
  Called after the container is built, only when the container is started
  CMD ["make"."prod_server"]

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We use the dockerfile file we have written to build the image

  $ docker build -t="The mock - server: 1.0.0" .
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Let’s look at the mirror image

$Docker Images REPOSITORY TAG IMAGE ID CREATED SIZE mock-server 1.0.0 957ad2aa1f97 8 minutes ago 674MB Mongo latest 05b3651ee24e 2 weeks ago 382MBCopy the code

Now comes the crucial step of running the Mocker-Server image and establishing the connection between the server and the database
```
   $ docker run -d-i-t -p 7001:7001 --name mock-server1 --link mock-mongo:db mock-server:1.0.0 /bin/bashCopy the code
```
Let’s take a look at the container now running

 $ docker ps
 CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS              PORTS                      NAMES
 ee780b903c64        mock-server:1.0.0   "/bin/bash"About a minute ago Up 11 seconds 0.0.0.0:7001->7001/ TCP mock-server 0d440be90935 mongo"Docker - entrypoint. S..."16 hours ago Up 16 hours 0.0.0.0:27017->27017/ TCP mock-mongoCopy the code

Check the connection status between node and Mongo containers

 $ docker exec -it mock-server /bin/bash
 $ curl db
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Now that our server is connected to the database, we need to deploy our client

Build the nginx container and connect it to the Node container

Before establishing nginx, we need to agree on the node container alias, the port number for nginx forwarding, and the domain name and port number for clients to access nginx
- Node Server alias: node
- Port number mapped to the Node container: 7001
- Nginx domain name: 127.0.0.1
- Nginx port number: 90

Let’s start by pulling the Nginx image and creating the container

$ docker pull nginx:latest
$ docker run -p 90:80 --link mock-node:node nginx:latest --name mock-nginx
Check the container connection status
$ docker exec -it mock-nginx /bin/bash
$ env
If you see the following data, the connection is successfulNODE_PORT_7001_TCP = TCP: / / 172.17.0.3:7001 NODE_PORT_7001_TCP_PORT = 7001 NODE_ENV_YARN_VERSION = 1.9.4Copy the code

Now we are looking at a container that is already running

 $ docker ps
 CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                      NAMES
 09644025d148        nginx               "Nginx - g 'daemon of..."5 hours ago Up 5 hours 0.0.0.0:90->80/ TCP mock-nginx EE780b903C64 mock-server:1.0.0"/bin/bash"About a minute ago Up 11 seconds 0.0.0.0:7001->7001/ TCP mock-server 0d440be90935 mongo"Docker - entrypoint. S..."24 hours ago Up 24 hours 0.0.0.0:27017->27017/ TCP mock-mongoCopy the code

Due to the independent deployment of the front end, we need to modify the configuration of nginx. The configuration can be modified in the following ways
- To create the container, use the -v command to mount the configuration file to the local host, and restart nginx in the container after the local modification
- Copy the configuration file to the local host, replace the corresponding file of the container, and restart nginx in the container
- .
Our current operating environment is 17 edition 15 inch macbook Pro, which requires special configuration for mounting, so I adopted the second method

Modifying configuration files

Container configuration file path/etc/nginx/conf. D/default. Conf
Copy the configuration file to the local PC

    $ docker cp mock-nginx:/etc/nginx/conf.d/default.conf ~/nginx/default.conf
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Add the following configuration to the nginx configuration file

server {
   location /mock-api/ {
       # node is an alias for the instruction server container
       proxy_pass http://node:7001/;
   }

   location /mock {
     autoindex on;
     alias/root/dist; }}Copy the code

Overwrite the container configuration and restart nginx

$ docker cp ~/nginx/default.conf mock-nginx:/etc/nginx/conf.d/default.conf
# Enter container
$ docker exec -it mock-nginx /bin/bash
# Restart nginx. If the following message is displayed, the restart is successful
$ nginx -s reload
2018/11/03 17:23:14 [notice] 68#68: signal process started
    
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This brings us to our final and exciting step
Modify the network domain name requested by our front-end project and upload the package

// api-mocker/client/config 
// module.exports > build > serverRoot

module.exports = {
    build: {
        serverRoot: '127.0.0.1:90 / mock - API'}}Copy the code

Upload the packaged dist file to the /root/dist directory of the nginx configuration

   $ docker cp ~/Sites/api-mocker/client/dist mock-nginx:/root
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> < p style = "max-width: 100%; clear: both; min-height: 1emCopy the code

test

We’ve done all the mind-blowing stuff, and now we’re going to test it out
Visit the front end project: http://127.0.0.1:90/mock we will see that the following screen indicates that our front end project has been successfully deployed
When we try to register an account and see a success message, it means that our entire project has been successfully deployed

Now that our deployment is complete, we can have fun writing projects using the mock interface

conclusion

It was the first time to write an article and deploy like this. I sorted out my ideas and hoped to bring some help to you. Finally, I attached the common docker commands I sorted out and the project used the configuration file SegmentFault link

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Docker container Deployment attempt — Multi-container communication (Node + mongoDB + nginx)

Here’s why

Multicontainer communication

Next, let’s try deployment

The implementation process

Build the Mongo container

Build the Node container and connect it to the Mongo container

Build the nginx container and connect it to the Node container

test

conclusion

Docker container Deployment attempt — Multi-container communication (Node + mongoDB + nginx)

Here’s why

Multicontainer communication

Next, let’s try deployment

The implementation process

Build the Mongo container

Build the Node container and connect it to the Mongo container

Build the nginx container and connect it to the Node container

test

conclusion

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