Tag: lxc – ServerOK

lxc error Unable to fetch GPG key from keyserver

Posted on June 27, 2021 by ServerOk

When i create an lxc container on the Ubuntu server, I get an error

root@instance-20210627-0830:~# lxc-create -t download -n ok
Setting up the GPG keyring
ERROR: Unable to fetch GPG key from keyserver
lxc-create: ok: lxccontainer.c: create_run_template: 1616 Failed to create container from template
lxc-create: ok: tools/lxc_create.c: main: 319 Failed to create container ok
root@instance-20210627-0830:~#

root@instance-20210627-0830:~# lxc-create -t download -n ok

Setting up the GPG keyring

ERROR: Unable to fetch GPG key from keyserver

lxc-create: ok: lxccontainer.c: create_run_template: 1616 Failed to create container from template

lxc-create: ok: tools/lxc_create.c: main: 319 Failed to create container ok

root@instance-20210627-0830:~#

To fix this, you can run

export DOWNLOAD_KEYSERVER="keyserver.ubuntu.com"

1	export DOWNLOAD_KEYSERVER="keyserver.ubuntu.com"

To make it permanent, add it to .bashrc

vi ~/.bashrc

1	vi ~/.bashrc

At the end of the file, add

export DOWNLOAD_KEYSERVER="keyserver.ubuntu.com"

1	export DOWNLOAD_KEYSERVER="keyserver.ubuntu.com"

Method 2 You can specify DOWNLOAD_KEYSERVER environment variable for the command with

DOWNLOAD_KEYSERVER="keyserver.ubuntu.com" lxc-create -t download -n mycontainer -- -d ubuntu -r focal -a amd64

1	DOWNLOAD_KEYSERVER="keyserver.ubuntu.com" lxc-create -t download -n mycontainer -- -d ubuntu -r focal -a amd64

Method 3 Use […]

Copy a file from host into LXD container

Posted on January 18, 2021 (June 27, 2021) by ServerOk

To copy file from host machine to LXD container run

lxc file push FILE_NAME CONTAINER_NAME/FOLDER/

1	lxc file push FILE_NAME CONTAINER_NAME/FOLDER/

Example

lxc file push ant-media-server-enterprise-2.2.1-20201029_2042.zip centos8/root/

1	lxc file push ant-media-server-enterprise-2.2.1-20201029_2042.zip centos8/root/

To copy a file from the host machine to an lxd container, run

lxc file push FILE_NAME CONTAINER_NAME/path/to/folder/

1	lxc file push FILE_NAME CONTAINER_NAME/path/to/folder/

To copy a file from LXD container to the local machine, run

lxc file pull first-vm/root/2.txt .

1	lxc file pull first-vm/root/2.txt .

If you need to copy a folder and files inside, you can use option –recursive […]

LXD container snapshot and restore

Posted on August 31, 2019 by ServerOk

lxc allow you to take snapshot, restore snapshot of a container. Here we create a snapshot, then delete the /etc folder from the container. Now the container is useless. Restore the container from snapshot to get it work again.

root@UNUSED:~# lxc snapshot my-vm-2 my-vm-2-snap1
root@UNUSED:~# lxc exec my-vm-2 -- rm -rf /etc
root@UNUSED:~# lxc exec my-vm-2 -- bash
I have no name!@my-vm-2:~# ls -l / | grep etc
I have no name!@my-vm-2:~# exit
root@UNUSED:~# lxc restore my-vm-2 my-vm-2-snap1
root@UNUSED:~# lxc exec my-vm-2 -- bash
root@my-vm-2:~# ls -l / | grep etc
drwxr-xr-x  89 root   root    4096 Aug 27 07:06 etc
root@my-vm-2:~# exit
root@UNUSED:~#

root@UNUSED:~# lxc snapshot my-vm-2 my-vm-2-snap1

root@UNUSED:~# lxc exec my-vm-2 -- rm -rf /etc

root@UNUSED:~# lxc exec my-vm-2 -- bash

I have no name!@my-vm-2:~# ls -l / | grep etc

I have no name!@my-vm-2:~# exit

root@UNUSED:~# lxc restore my-vm-2 my-vm-2-snap1

root@UNUSED:~# lxc exec my-vm-2 -- bash

root@my-vm-2:~# ls -l / | grep etc

drwxr-xr-x 89 root root 4096 Aug 27 07:06 etc

root@my-vm-2:~# exit

root@UNUSED:~#

[…]

Create lxc container with lxc-create

Posted on August 26, 2019 (June 27, 2021) by ServerOk

lxc-create is used to create lxc container. To create a container, run

lxc-create -t download -n CONTAINER_NAME_HERE

1	lxc-create -t download -n CONTAINER_NAME_HERE

This will list all available containers. You can select the OS you want to use. To specify OS, you can use the following examples

lxc-create -t download -n mycontainer-1 -- -d ubuntu -r focal -a amd64
lxc-create -t download -n mycontainer-2 -- -d debian -r buster -a amd64

1 2	lxc-create -t download -n mycontainer-1 -- -d ubuntu -r focal -a amd64 lxc-create -t download -n mycontainer-2 -- -d debian -r buster -a amd64

To list all containers, run

lxc-ls -f

lxc-ls -f

To start a container, run

lxc-start NAME

1	lxc-start NAME

To connect to a container, […]