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Janak Shrestha
Janak Shrestha

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Create a Docker Network

#docker #dockernetwork #network

The Nautilus DevOps team needs to set up several docker environments for different applications. One of the team members has been assigned a ticket where he has been asked to create some docker networks to be used later. Complete the task based on the following ticket description:

a. Create a docker network named as ecommerce on App Server 2 in Stratos DC.

b. Configure it to use bridge drivers.

c. Set it to use subnet 10.10.1.0/24 and iprange 10.10.1.0/24.

Connect to App Server 2 

ssh steve@stapp02
sudo -i
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Password for steve: Am3ric@

Create the Docker Network

Create the network named ecommerce using the bridge driver with the specified subnet and IP range:

docker network create \
  --driver bridge \
  --subnet 10.10.1.0/24 \
  --ip-range 10.10.1.0/24 \
  ecommerce
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The network was created successfully with ID dff163cd2d75.

Verify the Network

Confirm the network exists:

docker network ls | grep ecommerce
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Output:

dff163cd2d75   ecommerce   bridge    local
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The network ecommerce is listed with the bridge driver.

Inspect the Network Configuration

View full network details:

docker network inspect ecommerce
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Key values from the output:

Field Value
Name ecommerce
Driver bridge
Subnet 10.10.1.0/24
IPRange 10.10.1.0/24

Verify individual settings:

docker network inspect ecommerce --format='Driver: {{.Driver}}'
docker network inspect ecommerce --format='Subnet: {{range .IPAM.Config}}{{.Subnet}}{{end}}'
docker network inspect ecommerce --format='IPRange: {{range .IPAM.Config}}{{.IPRange}}{{end}}'
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Output:

Driver: bridge
Subnet: 10.10.1.0/24
IPRange: 10.10.1.0/24
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All settings confirmed correct.

Complete Command Sequence 

ssh steve@stapp02
sudo -i

docker network create \
  --driver bridge \
  --subnet 10.10.1.0/24 \
  --ip-range 10.10.1.0/24 \
  ecommerce

docker network ls | grep ecommerce
docker network inspect ecommerce
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