Image name required for download/pull

Docker Hub General
1

Hello,

I am trying to mount local file system (/mnt/gpfs) inside docker on RHEL 7.6 (ppc64le) arch.
I need to know the “image name” that I need to pull or download to be used while mounting

Can anyone please assist

Docker version

Client:
Version: 18.03.1-ce
API version: 1.37
Go version: go1.9.5
Git commit: ccde200
Built: Tue May 29 17:39:14 2018
OS/Arch: linux/ppc64le
Experimental: false
Orchestrator: swarm

Server:
Engine:
Version: 18.03.1-ce
API version: 1.37 (minimum version 1.12)
Go version: go1.9.5
Git commit: ccde200
Built: Tue May 29 17:41:41 2018
OS/Arch: linux/ppc64le
Experimental: false

Regards

2

Hi

What are you trying to achieve?
You must have some docker image that you want to a container on, and mount the file system to that container?

3

Hi Martin,
Thanks for your response

I have mount point (gpfs/prod) at remote host (Host A) and I have successfully mount it as (/mnt/gpfs) on Host B (local host ) where we also have docker running .
Now the next step is to mount (/mnt/gpfs) under docker so i can see it under docker file system.

root@HostB> docker exec -it Db2wh bash
[root@HostB - Db2wh /]# df -h

Filesystem Size Used Avail Use% Mounted on
overlay 45G 30G 16G 66% /
tmpfs 64M 0 64M 0% /dev
clusterfs 16T 15T 1.5T 91% /mnt/blumeta0
/dev/mapper/rhel-root 45G 30G 16G 66% /etc/hosts
shm 512M 322M 191M 63% /dev/shm
tmpfs 62G 4.1G 58G 7% /run
tmpfs 13G 0 13G 0% /run/user/500
tmpfs 13G 0 13G 0% /run/user/503
tmpfs 13G 0 13G 0% /run/user/305482416
tmpfs 13G 0 13G 0% /run/user/0

I have seen several articles on web for the mount procedure but what i need image name (in our case ) as most of the examples show images/repositories (which can be pulled or downloaded) as ubuntu , debian, busybox , nginx etc.

Can i use any of these images (debian , nginx etc ) in my case ?
OR
Some specific redhat linux related image would be required ??

Example Links :

My Env
#######
OS: RHEL 7.6 (ppc64le)

Docker

Client:
Version: 18.03.1-ce
API version: 1.37
Go version: go1.9.5
Git commit: ccde200
Built: Tue May 29 17:39:14 2018
OS/Arch: linux/ppc64le
Experimental: false
Orchestrator: swarm

Server:
Engine:
Version: 18.03.1-ce
API version: 1.37 (minimum version 1.12)
Go version: go1.9.5
Git commit: ccde200
Built: Tue May 29 17:41:41 2018
OS/Arch: linux/ppc64le
Experimental: false

Also , you can suggest any other way to achieve this task

Thanks in advance

Regards
Shariq

4

Hi again.

Yes mounting a filesystem is a docker feature, that you can use in any images.
You mention busybox, and example of this could be:

docker run -ti -v /mnt/gpfs:/mnt/gpfs -v busybox

This will start a container, from the image busybox and it will give you a promth (since you dont have -d in docker run)
and there you should now have the same mountpoint /mnt/gpfs

Is it something like this you meant?

5

Hi Martin,
Thanks, I got a hint from the command you shared and it WORKED for a new container and target mount point can be seen !!
However, We are still looking to mount (/mnt/gpfs) into an exisitng container (NAMES=Db2wh) , Please check the command and its response at the end.

LOCAL FILE SYSTEM →

[root@HOSTB]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rhel-root 45G 30G 16G 66% /
devtmpfs 62G 0 62G 0% /dev
tmpfs 62G 0 62G 0% /dev/shm
tmpfs 62G 107M 62G 1% /run
tmpfs 62G 0 62G 0% /sys/fs/cgroup
/dev/mapper/mpatha2 1014M 180M 835M 18% /boot
clusterfs 16T 16T 912G 95% /mnt/clusterfs
overlay 45G 30G 16G 66% /var/lib/docker/overlay2/13c00d8da105f15d306ffa8a67431b0d63f622ddd129209d27df84ab8f615903/merged
shm 512M 323M 190M 64% /var/lib/docker/containers/2e4baf2805cb1313f24056c2a17c6daf3b4b590dec4637176edb12b69bd3f8ae/mounts/shm
/dev/loop0 3.2G 3.2G 0 100% /mnt/cdrom
tmpfs 13G 0 13G 0% /run/user/0
172.X.X.X:/gpfs/prod 176T 120T 56T 69% /mnt/gpfs

CONTAINER (Db2wh) →

[root@HOSTB]# docker exec -it Db2wh bash
[root@HOSTB - Db2wh /]# df -h
Filesystem Size Used Avail Use% Mounted on
overlay 45G 30G 16G 66% /
tmpfs 64M 0 64M 0% /dev
clusterfs 16T 16T 912G 95% /mnt/blumeta0
/dev/mapper/rhel-root 45G 30G 16G 66% /etc/hosts
shm 512M 322M 191M 63% /dev/shm
tmpfs 62G 4.1G 58G 7% /run
tmpfs 13G 0 13G 0% /run/user/500
tmpfs 13G 0 13G 0% /run/user/503
tmpfs 13G 0 13G 0% /run/user/305482416

IMAGES:

[root@node1-db2wh gpfs]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
store/ibmcorp/db2wh_ee v11.5.2.0-db2wh-ppcle 6fbe8385dfd8 2 years ago 9.05GB
veritasnetbackup/client 8.1.2 182088531fa8 3 years ago 1.23GB

DOCKER PS

[root@node1-db2wh gpfs]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2e4baf2805cb store/ibmcorp/db2wh_ee:v11.5.2.0-db2wh-ppcle “/usr/sbin/init” 4 months ago Up 4 months Db2wh

[root@node1-db2wh gpfs]# docker run -d -it --privileged=true --net=host --name=Db2wh -v /mnt/gpfs:/mnt/gpfs 6fbe8385dfd8
docker: Error response from daemon: Conflict. The container name “/Db2wh” is already in use by container “2e4baf2805cb1313f24056c2a17c6daf3b4b590dec4637176edb12b69bd3 f8ae”. You have to remove (or rename) that container to be able to reuse that name.

Appreciate your help !

Regards
Shairq Hanif

6

Hi Martin ,
Could you please check my last response and assist

Thanks,
Shariq

7

Hi again

Sorry for the late response, have been alone with my daugter for vacation and there is not so much computer time when she is here :wink:

But you cant do it to allready running containers, you need to stop+delete the old one, and re-create it with the correct mounts.

Is there a reason why you dont stop+delete the current?