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Merge pull request #12371 from mradamt/master 

Update code snippets, typo, formatting
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Usha Mandya 2021-03-24 14:28:33 +00:00 committed by GitHub
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@ -35,7 +35,7 @@ Now we’ll create a network that our application and database will use to talk
$ docker network create mysqlnet $ docker network create mysqlnet
``` ```
Now we can run MySQL in a container and attach to the volumes and network we created above. Docker pulls the image from Hub and run it for you locally. Now we can run MySQL in a container and attach to the volumes and network we created above. Docker pulls the image from Hub and runs it for you locally.
```shell ```shell
$ docker run -it --rm -d -v mysql:/var/lib/mysql \ $ docker run -it --rm -d -v mysql:/var/lib/mysql \
@ -69,11 +69,13 @@ mysql>
### Connect the application to the database ### Connect the application to the database
In the above command, we used the same MySQL image to connect to the database but this time, we passed the ‘mysql’ command to the container with the `-h` flag containing the name of our MySQL container name. Press CTRL-D to exit the MySQL interactive terminal. In the above command, we used the same MySQL image to connect to the database but this time we passed the ‘mysql’ command to the container with the `-h` flag containing the name of our MySQL container name.
Press CTRL-D to exit the MySQL interactive terminal.
Next, we'll update the sample application we created in the [Build images](build-images.md#sample-application) module. To see the directory structure of the Python app, see [Python application directory structure](build-images.md#directory-structure). Next, we'll update the sample application we created in the [Build images](build-images.md#sample-application) module. To see the directory structure of the Python app, see [Python application directory structure](build-images.md#directory-structure).
Okay, now that we have a running MySQL, let’s update the`app.py` to use MySQL as a datastore. Let’s also add some routes to our server. One for fetching records and one for inserting records. Okay, now that we have a running MySQL, let’s update the `app.py` to use MySQL as a datastore. Let’s also add some routes to our server: one for fetching records and one for inserting records.
```shell ```shell
import mysql.connector import mysql.connector
@ -143,7 +145,7 @@ if __name__ == "__main__":
We’ve added the MySQL module and updated the code to connect to the database server, created a database and table. We also created a couple of routes to save widgets and fetch widgets. We now need to rebuild our image so it contains our changes. We’ve added the MySQL module and updated the code to connect to the database server, created a database and table. We also created a couple of routes to save widgets and fetch widgets. We now need to rebuild our image so it contains our changes.
First, let’s add the `mysql-connector-python `module to our application using pip. First, let’s add the `mysql-connector-python` module to our application using pip.
```shell ```shell
$ pip3 install mysql-connector-python $ pip3 install mysql-connector-python
@ -170,7 +172,7 @@ $ docker run \
Let’s test that our application is connected to the database and is able to add a note. Let’s test that our application is connected to the database and is able to add a note.
```shell ```shell
$ curl http://localhost:5000/initdb $ curl http://localhost:5000/db
$ curl --request POST \ $ curl --request POST \
--url http://localhost:5000/widgets \ --url http://localhost:5000/widgets \
--header 'Content-Type: application/x-www-form-urlencoded' \ --header 'Content-Type: application/x-www-form-urlencoded' \
@ -231,10 +233,11 @@ $ docker-compose -f docker-compose.dev.yml up --build
We pass the `--build` flag so Docker will compile our image and then starts the containers. We pass the `--build` flag so Docker will compile our image and then starts the containers.
Now let’s test our API endpoint. Run the following curl command: Now let’s test our API endpoint. Run the following curl commands:
```shell ```shell
$ curl --request GET --url http://localhost:8080/widgets $ curl --request GET --url http://localhost:5000/db
$ curl --request GET --url http://localhost:5000/widgets
``` ```
You should receive the following response: You should receive the following response: