Create a Docker Network

Question : 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 3 in Stratos 

 b. Configure it to use macvlan drivers.

 c. Set it to use subnet 10.10.1.0/24 and iprange 10.10.1.3/24.

Please Note :-  Perform the below commands based on your question  server,  user name & other details might differ . So please read task carefully before executing. 

All the Best 👍

Solution:   

1. Login on app server  as per the task  &  Switch to  root user

thor@jump_host /$ ssh banner@stapp03 The authenticity of host 'stapp03 (172.16.238.12)' can't be established. ECDSA key fingerprint is SHA256:ZixOao4TAd04RydpSWZyhDYG0xWlCBvt5YMnI2PunL0. ECDSA key fingerprint is MD5:22:3b:f5:1e:4f:e8:e8:2f:fa:f9:51:7b:fe:b0:0f:2a. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'stapp03,172.16.238.12' (ECDSA) to the list of known hosts. banner@stapp03's password: [banner@stapp03 ~]$ sudo su - We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things:     #1) Respect the privacy of others.     #2) Think before you type.     #3) With great power comes great responsibility. [sudo] password for banner: [root@stapp03 ~]#

2. Check existing network on server

[ [root@stapp03 ~]# docker network ls NETWORK ID          NAME                DRIVER              SCOPE bc6221d32cd7        bridge              bridge              local d7abbedae5f6        host                host                local ff2f676e4cee        none                null                local [root@stapp03 ~]#

3. Create a docker network as per the task use network name subnet  & IPrange

[root@stapp03 ~]# docker network create -d macvlan --subnet=10.10.1.0/24 --ip-range=10.10.1.3/24 ecommerce 6d80bd900856588d5935d94700f20ed29b18b10c222c769cacb7dcac732a8870 [root@stapp03 ~]#

4. Validate the task network has been created successfully 

[root@stapp03 ~]# docker network ls NETWORK ID          NAME                DRIVER              SCOPE bc6221d32cd7        bridge              bridge              local 6d80bd900856        ecommerce           macvlan             local d7abbedae5f6        host                host                local ff2f676e4cee        none                null                local [root@stapp03 ~]# docker network inspect ecommerce [     {         "Name": "ecommerce",         "Id": "6d80bd900856588d5935d94700f20ed29b18b10c222c769cacb7dcac732a8870",         "Created": "2021-07-04T15:41:45.972897183Z",         "Scope": "local",         "Driver": "macvlan",         "EnableIPv6": false,         "IPAM": {             "Driver": "default",             "Options": {},             "Config": [                 {                     "Subnet": "10.10.1.0/24",                     "IPRange": "10.10.1.3/24"                 }             ]         },         "Internal": false,         "Attachable": false,         "Ingress": false,         "ConfigFrom": {             "Network": ""         },         "ConfigOnly": false,         "Containers": {},         "Options": {},         "Labels": {}     } ] [root@stapp03 ~]#

5.  Click on Finish & Confirm to complete the task successful

Happy Learning!!!!

Apart from this if you need more clarity,  I have made a  tutorial video on this , please go through and share your comments. Like and share the knowledge