First, how to own a private mirror?
Method One: Use the commit command
1, assuming that a currently running httpd container, we can modify the html content directly container.
docker exec -it 2b66eedfc838 /bin/bash
id is the view out of the container with a docker ps: 2b66eedfc838
-it: no interference can enter the vessel
2, modify the index.html file
vim index.html
Note: If you do not have the vim command, the need to separately install the apt-get command.
3, the container is submitted modified private image.
docker commit 2b66eedfc838 my-httpd
4, to see if there is a mirror docker
Method 2: Dockerfile
1. Create a folder
mkdir myimage
2. Create Dockerfile
3、build Dockerfile
build docker .
4, to see if success
Second, the operation of the vessel which way?
1, foreground
如Docker run -it ubuntu /bin/bash
-i representative interactive
-t representatives terminal
2, running in the background
The Docker run -d -p 8088: 80 docker.io/httpd
-d behalf detached, comes running in the background
Third, the container can control the use of resources?
The answer is yes, control by CGroups cpu, disk i / o, memory, etc., and the virtual machine control feel similar resources.
Fourth, network operation mechanism of the container is kind of how?
Container default network communication mechanism is bridge, how to understand?
Each start a container, the actual allocated a veth interface that interfaces with docker0 Bridge bridge communication. The card docker0 and the host is actually connected through the port mapping mode.
With docker network inspect bridge command, at a glance understanding. On the gateway corresponds docker0, the ip address in each container veth interface.
In fact, we can create a similar docker0 new gateway and the new container bridge to join the group, to form a new network segment. The host network segment can communicate, different network segments can not be exchanged.
I hope this article can help you.
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