[RUBY] Regarding overcapacity when setting Rails tutorial environment in Cloud 9

Purpose of the article

・ For your own memo Rails tutorials on Cloud9 Share your stumbling blocks with beginners

PC environment

macOS Catalina 10.15.7 MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports) Processor 1.4 GHz quad core Intel Core i5 Memory 8GB version CentOs version: 7 Ruby version: 2.7.2 (x86_64-linux) Rails version: 5.1.7

Article content

Where I stumbled while following the Rails tutorial

1. Rail does not start
2. Cloud9 shows that there is not enough space

Rails doesn't start

After completing the environment construction and trying to launch Rails on the local server, the following is displayed. If you look closely, it was mentioned in the tutorial, but when you click on the upper right, it started up safely in another browser. (Embarrassing ... lol)

Cloud9 shows that there is not enough space

When I tried to install heroku, the following message was displayed and the installation was not possible.

No space left on device 

Therefore, when I checked the capacity with the following command, I confirmed that the capacity was maxed out in/dev/xvda1.

ubuntu:~/environment/hello_app (master) $ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            476M     0  476M   0% /dev
tmpfs            98M  9.3M   89M  10% /run
/dev/xvda1      9.7G  9.7G     0 100% /

I updated the volume and snapshot by referring to the following article, but the above capacity overrun was not resolved ..

https://qiita.com/itotoma/items/d266df563367a0a14268

After all, by initializing Cloud9 and rebuilding it, the above problem was solved. (Mystery remains a mystery)

However, it seems that it may not work at worst if the capacity is exceeded, so If you are studying rails tutorial on Cloud9, it is a good idea to increase the capacity as soon as possible.

It's easy, but here's how to do it.

1. Open the Amazon EC2 console
2. Select the volume you want to change Select "Change Volume" from the "Action" button at the top and change the size from 10 to 30 (free max capacity is 30)
3. Go to "Instance" and select "Instance Status"-> "Restart (Start if stopped)" from the "Action" button at the top of the screen. Go back to Cloud9 and expand the volume from the terminal
4. Expand the capacity with the following command

$ sudo growpart /dev/xvda 1
$ lsblk
.
.
xvda 202:0 0 30G 0 disk
└─xvda1 202:1 0 30G 0 part /

5. Finally, extend the file system with the following command

$ sudo resize2fs /dev/xvda1
$ df -h
Filesystem Size Used Avail Use% Mounted on
.
.
/dev/xvda1 30G 8.2G 21G 27% /

At the end

I'm sorry for the boring article, but thank you for reading to the end! I'm working on the rails tutorial, so I'm not sure about it again. I would like to make an article.