What about processes?
One of the great things about Docker is that it isn't really virtualization; as mentioned in the previous chapter, it is a great way of isolating processes rather than running an entire operating system.
This can get confusing when running tools such as top or ps. To get an idea just how confusing this can get, lets launch several containers using docker-compose and see for ourselves:
[vagrant@centos7 ~]$ cd /monitoring_docker/Chapter01/02-multiple [vagrant@centos7 02-multiple]$ docker-compose up -d Creating 02multiple_web_1... [vagrant@centos7 02-multiple]$ docker-compose scale web=5 Creating 02multiple_web_2... Creating 02multiple_web_3... Creating 02multiple_web_4... Creating 02multiple_web_5... Starting 02multiple_web_2... Starting 02multiple_web_3... Starting 02multiple_web_4... Starting 02multiple_web_5...
Now, we have five web servers that have all been launched from the same image using the same configuration. One of the first things I do when logging into...
