dockerNetworking.md

🐳 Docker Networking 🐳

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• same as the virtual machine networking here are seven types of network present

1. bridge - laptop ke andar ek local address use karega like laptop is router for it
2. host - laptop ka ip use karega
3. macvlan - make a separate machine direct router se connect hoga making it more usefull for hacking it will have it's own macaddress
4. ipvlan - more control over ip address assign ip to daemon according to given ip poll
5. overlay -- multiple daemon ko sath me lata hai
6. none - isolate the machine

Docker uses default bridge network

find a repo that has network tool install init i'd find one might not run when you see

docker run -it --name server1 weibeld/ubuntu-networking

To check whether the server1 is connect to internet or not

ping google.com

Some networking command

ipconfig for windows for linux/mac ifconfig
docker network ls
docker inspect bridge

Let's ping two dockers

• create another ubuntu container docker run -it --name server2 weibeld/ubuntu-networking
• To know ip address use

hostname -I
ping [ipaddress]

the above will be on the same class of the network

Lets create a network

docker network
dokcer network ls
docker network create work 

work is default bridge type network but will be of different class have different ip address

Creating a container with the network type of bridge

docker run -it --network work --name server3 weibeld/ubuntu-networking hostname -I both server 1[172.17.0.2] and server 3 has different ip like[172.18.0.2]

since the server1 and server3 are on the different class of network or on the different bridge you cannot ping to one another

• we can not ping a container by it's name because they are on the default network

Let's assign work network to server1

docker network connect work server1 now server1 will have 2 ip address and connected to default bridge as well as our work network

Lets ping server1 to server3

ping server1 or it's work ip address

docker start server3
docker exec -it server3 bash

so our docker is connect through a bridge to our machine so when we want to run any web application on the specific port like 3000 we have to do port-forwarding so that our machine can access the daemon's port

connecting our daemon to host

docker run -it --network host server2