[lxc-users] loading a file system

[Mohan G]

Thanks. When i say my own file system, yes my own kernel file system written for linux. A small yet working FS.I want to load this FS and want applications to use them, but not consume entire cpu and memory. If i can bring up KVM then i can set cpu and memory for this KVM and load and mount my FS in this KVM and KVM's resource limits will directly control the FS consumption etc. 
How i can achieve the same thing without using KVM. When i mean template, i mean the linux image used as a separate container. ( i assume i can build a new linux distro with my FS as default) and boot it up. I am aware that containers are user level and share the same kernel. Thank for the patience
 

     On Wednesday, January 14, 2015 10:37 AM, Fajar A. Nugraha <list at fajar.net> wrote:
   

 You need to be more clear. More response inline

On Wed, Jan 14, 2015 at 11:26 AM, Mohan G <mohan_gg at yahoo.com> wrote:
>
> Thanks for the reply, now i guess my specific question is.
> 1) I have my own file system which i can load to the kernel. But i want to restrict the file systems usage as a whole.

Do you mean your own file system module? e.g. something like fuse?
What do you mean by "restrict the file systems usage"? Only some
container can use that type of fs? Restrict its size?

Short version is you should set all mounts in the host (including
loading the fs module, if it's a new one), and the container can then
simply use it. Also, do NOT allow containers to mount their own
filesystem (this is already the default setting when you use ubuntu
container on ubuntu host)


> 2) which means if i can build a kernel template with my FS on it , then would i be able to set limits on memory and cpu for the FS.
>

what "kernel template"? You DO know that containers share the same
kernel as the host, right?
Also, I see no direct connection between "memory and cpu" and the type
of filesystem. Are you perhaps confusing FS, when you mean "container"
(i.e. guest)

> basically i am looking for ways for FS to use KVM type limit ( in terms of cpu and memory) without actually using KVM.

If you mean "limit container's cpu and memory use", see earlier
response about cgroups. Again, I see no correlation between FS and
"cpu and memory".

-- 
Fajar
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