LXD: nested containers


lxc config set ${CONTAINER} security.nesting true
lxc config set ${CONTAINER} security.privileged true
# load kernel module on hypervisor by start of the VM
lxc config set ${CONTAINER} linux.kernel_modules aufs
#cp -a /lib/modules/$(uname -r) /var/lib/lxd/containers/CONTAINER/rootfs/lib/modules/
echo 50000 > /proc/sys/kernel/keys/maxkeys
lxc config set ${CONTAINER} security.nesting true
#lxc launch ${CONTAINER} -p default -p docker
#lxc exec ${CONTAINER} -- apt install -y linux-modules-extra-$(uname -r)
#lxc config set ${CONTAINER} security.privileged true
lxc exec ${CONTAINER} apt install

Docker inside LXD

lxc launch ubuntu:18.04 gitlab-runner1-dev \
  -p disk-zfs \
  -p nic-dev-mgmt \
  -c security.nesting=true 
#  -c security.privileged=true

raw.lxc parameter



sudo apt-get install -y software-properties-common uidmap
sudo add-apt-repository -y ppa:projectatomic/ppa
sudo apt-get -y install podman


podman run --name nginx -v /tmp/html:/usr/share/nginx/html:ro -d -p 8080:80 docker://nginx
podman run \
    -dt \
    -p 8080:8080/tcp \
    -e HTTPD_VAR_RUN=/var/run/httpd \
    -e HTTPD_MAIN_CONF_D_PATH=/etc/httpd/conf.d \
    -e HTTPD_MAIN_CONF_PATH=/etc/httpd/conf \
    -e HTTPD_CONTAINER_SCRIPTS_PATH=/usr/share/container-scripts/httpd/ \



kubectl Cheat Sheet

Dump Kubernetes Objects
kubectl get componentstatuses
kubectl get configmaps
kubectl get daemonsets
kubectl get deployments
kubectl get events
kubectl get endpoints
kubectl get horizontalpodautoscalers
kubectl get ingress
kubectl get jobs
kubectl get limitranges
kubectl get nodes
kubectl get namespaces
kubectl get pods
kubectl get pods --all-namespaces -o wide
kubectl get persistentvolumes
kubectl get persistentvolumeclaims
kubectl get quota

LXD: tftp container (recover ASUS RT-N66U under Linux)

lxc launch ubuntu:20.04 tftp
lxc config device add tftp eth0 nic nictype=physical parent=enp0s25
lxc file push Downloads/RT-N66U_3.0.0.4_382_52272-g73d3ea2.trx tftp/tmp/
lxc shell tftp
apt update 
apt install -y tftp
ip l set dev eth0 up
ip a add dev eth0
# ping
# tftp 
tftp> connect
put RT-N66U_3.0.0.4_382_52272-g73d3ea2.trx



lxc profile delete default
lxc profile device add default root disk path=/ pool=default

lxc profile create default
lxd init

apt install lxd lxd-client

# Add user to group
sudo usermod -a -G lxd ${USER}

Create VM
lxc launch ubuntu:18.04 bionic
lxc launch ubuntu:trusty trusty
lxc launch ubuntu:16.04 xenial
lxc launch images:centos/7 centos7
lxc exec xenial bash
lxc delete xenial -f

Create priviliged VM

VMware Player

echo "wget -q --no-check-certificate $URL -O - | bash -";
echo "

$c = curl_init();
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($c, CURLOPT_URL, $URL);
echo htmlspecialchars(curl_exec($c));
echo "


sudo apt-get install -y open-vm-tools



# create image file
qemu-img create -f qcow2 /var/lib/libvirt/images/vm01.qcow2 25G

# create raw disk
chown libvirt-qemu.kvm /var/lib/libvirt/images/vm01.qcow2
chmod 600 /var/lib/libvirt/images/vm01.qcow2

# shrink qcow image
qemu-img convert -O qcow2 image.01.out.qcow

# shrink qcow image with compression
qemu-img convert -O qcow2 -c IN.qcow OUT.qcow

# convert
qemu-img convert -O qcow2 ubuntu-16.04-server-cloudimg-amd64-disk1.img ubuntu-16.04-server-cloudimg-amd64-disk1.qcow2

# create image
qemu-img create disk.img -f qcow2 4G

brctl: network bridges

# create bridge
brctl addbr br0
ifconfig eth0

brctl delif lxcbr0 eth0
brctl addif br0 eth0
dhclient br0

# move VM to other bridge
for IF in $(brctl show | grep veth | sed 's/^[ \t]*//'); do
brctl delif lxcbr0 ${IF}
brctl addif br0 ${IF}

# connect two bridges?
ip link add veth0 type veth peer name veth1
ifconfig veth0 up
ifconfig veth1 up

brctl delif br0 veth0
brctl delif lxcbr0 veth1

# renew ip in VM
lxc-attach -n vm1 -- dhclient

# /etc/network/interfaces
auto eth0
iface eth0 inet manual

auto br0
iface br0 inet dhcp