Docker Tutorial for Beginners - A Full DevOps Course on How to Run Applications in Containers
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Date: 2022-03-14
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Comments and reviews: 5
Shrinidhi
I'm new to docker and I've got a doubt for which I'm not able to find the answer anywhere. Can someone please help me clear this doubt. -
Assuming we are running dockers on a Linux machine. I've learnt that docker container uses the underlying kernal of the OS which is installed. It interacts with the kernal directly. -
But still the very first line of the container image has a FROM UBUNTU, FROM REDHAT, etc declaration. When the container is run it'll download the specified OS image and first run that container, then this container/application we are intending to run will start. -
1> What is the purpose of pullling the OS image, when it can use the OS on which dockers is installed ? -
2> in the first place why do we even need an OS layer when dockers communicates directly with kernal and it hasgot nothing to do with the any OS -
3> Also if it has to download and run OS, what is the difference between VM and Containers ? even VM has its own OS... -
4> how does container become lightweight if it carries an OS of it own on every instance/run ?
reply
I'm new to docker and I've got a doubt for which I'm not able to find the answer anywhere. Can someone please help me clear this doubt. -
Assuming we are running dockers on a Linux machine. I've learnt that docker container uses the underlying kernal of the OS which is installed. It interacts with the kernal directly. -
But still the very first line of the container image has a FROM UBUNTU, FROM REDHAT, etc declaration. When the container is run it'll download the specified OS image and first run that container, then this container/application we are intending to run will start. -
1> What is the purpose of pullling the OS image, when it can use the OS on which dockers is installed ? -
2> in the first place why do we even need an OS layer when dockers communicates directly with kernal and it hasgot nothing to do with the any OS -
3> Also if it has to download and run OS, what is the difference between VM and Containers ? even VM has its own OS... -
4> how does container become lightweight if it carries an OS of it own on every instance/run ?
reply
Virtual
Docker now runs through Docker Desktop and that command line you used isn't visible or available. Where did you access the command line from? I need access to that specific command type in order to pull off some docker image and container commands I wish to test out. My docker is using Windows Powershell commands mainly, or through a Visual Studio Code application/extension.
reply
Docker now runs through Docker Desktop and that command line you used isn't visible or available. Where did you access the command line from? I need access to that specific command type in order to pull off some docker image and container commands I wish to test out. My docker is using Windows Powershell commands mainly, or through a Visual Studio Code application/extension.
reply
Davi
46:21 you need to install pip for this code the work, you also need respond yes to the prompt replacing this line:
RUN apt-get install --assume-yes python3
To install pip use:
RUN apt-get install --assume-yes python3-pip
reply
46:21 you need to install pip for this code the work, you also need respond yes to the prompt replacing this line:
RUN apt-get install --assume-yes python3
To install pip use:
RUN apt-get install --assume-yes python3-pip
reply
Harsh
Amazing course packed in 2h! The instructor's way of expressing and explaining the core concepts and technical aspects is just amazing. I'm really satisfied of what I have learnt from him - Huge thanks to KodeKloud! -
reply
Amazing course packed in 2h! The instructor's way of expressing and explaining the core concepts and technical aspects is just amazing. I'm really satisfied of what I have learnt from him - Huge thanks to KodeKloud! -
reply
Babu
Great content about Docker for a beginner like me, absolutely loved it !
Regarding your teaching way, to me, it's a simple, cool and good vocabs, perfect !!
Thanks for the content and All the very best !!!
reply
Great content about Docker for a beginner like me, absolutely loved it !
Regarding your teaching way, to me, it's a simple, cool and good vocabs, perfect !!
Thanks for the content and All the very best !!!
reply
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