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new-ct.sh
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#!/bin/bash
set -e # Exit when any command fails
#
# Constants
#
DEFAULT_OSTYPE='ubuntu'
DEFAULT_CORES=2
DEFAULT_MEMORY=2048
DEFAULT_ROOTFS='local-zfs:8'
#
# Functions
#
function echo_err() {
>&2 echo "$@"
}
function show_usage() {
if [ -n "$1" ]; then
tput setaf 1
echo "Error: $1";
tput sgr0
fi
echo_err
echo_err "Usage: $0 <ctid> --ostemplate <file> --hostname <name> --password <password> [OPTIONS]"
echo_err ' <ctid> Proxmox unique ID of the CT.'
echo_err ' --ostemplate The OS template or backup file.'
echo_err ' --hostname Set a host name for the container.'
echo_err ' --password Sets root password inside container.'
echo_err
echo_err 'Additional options:'
echo_err " --ostype OS type (default = $DEFAULT_OSTYPE)."
echo_err " --cores Number of cores per socket (default = $DEFAULT_CORES)."
echo_err " --memory Amount of RAM for the VM in MB (default = $DEFAULT_MEMORY)."
echo_err " --rootfs Use volume as container root (default = $DEFAULT_ROOTFS)."
echo_err ' --sshkey[s] Setup public SSH keys (one key per line, OpenSSH format).'
echo_err ' --privileged Makes the container run as privileged user (default = unprivileged).'
echo_err ' --install-docker Install docker and docker-compose.'
echo_err " --help, -h Display this help message."
echo_err
exit 1
}
#
# Main
#
CT_OSTEMPLATE=
CT_HOSTNAME=
CT_PASSWORD=
CT_OSTYPE=$DEFAULT_OSTYPE
CT_CORES=$DEFAULT_CORES
CT_MEMORY=$DEFAULT_MEMORY
CT_ROOTFS=$DEFAULT_ROOTFS
CT_SSHKEYS=
CT_UNPRIVILEGED=1
CT_INSTALL_DOCKER=0
# Parse arguments -- https://stackoverflow.com/a/14203146/33244
POSITIONAL_ARGS=()
while [[ "$#" -gt 0 ]]; do case $1 in
--ostemplate) CT_OSTEMPLATE="$2"; shift; shift;;
--hostname) CT_HOSTNAME="$2"; shift; shift;;
--password) CT_PASSWORD="$2"; shift; shift;;
--ostype) CT_OSTYPE="$2"; shift; shift;;
--cores) CT_CORES="$2"; shift; shift;;
--memory) CT_MEMORY="$2"; shift; shift;;
--rootfs) CT_ROOTFS="$2"; shift; shift;;
--sshkey|--sshkeys) CT_SSHKEYS="$2"; shift; shift;;
--privileged) CT_UNPRIVILEGED=0; shift;;
--install-docker) CT_INSTALL_DOCKER=1; shift;;
-h|--help) show_usage;;
-*|--*) show_usage "Unknown option: $1";;
*) POSITIONAL_ARGS+=("$1"); shift;;
esac; done
set -- "${POSITIONAL_ARGS[@]}" # restore positional parameters
CT_ID="$1"
if [ -z "$CT_ID" ]; then show_usage "You must inform a CT id."; fi;
if [ -z "$CT_OSTEMPLATE" ]; then show_usage "You must inform an OS template (--ostemplate)."; fi;
if [ -z "$CT_HOSTNAME" ]; then show_usage "You must inform a host name (--hostname)."; fi;
if [ -z "$CT_PASSWORD" ]; then show_usage "You must inform a password (--password)."; fi;
if [ $CT_INSTALL_DOCKER -eq 1 ]; then
if [ "$CT_OSTYPE" != 'ubuntu' ] && [ "$CT_OSTYPE" != 'debian' ] && [ "$CT_OSTYPE" != 'alpine' ]; then
show_usage "Don't know how to install docker on '$OSTYPE'.";
fi
fi;
if [ -n "$CT_SSHKEYS" ]; then
SSH_KEYS_ARGS="--ssh-public-keys $CT_SSHKEYS"
fi;
if [ $CT_INSTALL_DOCKER -eq 1 ]; then
DOCKER_VOL=$(./new-ct-docker-volume.sh $CT_ID)
# Extra arguments required for Docker
DOCKER_ARGS="--unprivileged $CT_UNPRIVILEGED --features keyctl=$CT_UNPRIVILEGED,nesting=1 --mp0 local-zfs:$DOCKER_VOL,mp=/var/lib/docker,backup=0"
fi;
# Create CT
CT_INTERFACE_NAME='eth0'
pct create $CT_ID $CT_OSTEMPLATE \
--ostype $CT_OSTYPE \
--cmode shell \
--hostname $CT_HOSTNAME \
--password $CT_PASSWORD \
--rootfs $CT_ROOTFS \
--net0 name=$CT_INTERFACE_NAME,bridge=vmbr0,ip=dhcp \
--cores $CT_CORES \
--memory $CT_MEMORY \
--onboot 1 \
$DOCKER_ARGS \
$SSH_KEYS_ARGS
# Cannot set timezone in 'pct create' (Bug?)
# Causes "Insecure dependency in symlink while running with -T switch at /usr/share/perl5/PVE/LXC/Setup/Base.pm"
# pveversion: pve-manager/7.0-11/63d82f4e (running kernel: 5.11.22-4-pve)
pct set $CT_ID --timezone host
# Start container
pct start $CT_ID
# Update /etc/issue
cat | pct exec $CT_ID -- sh -c 'cat > /etc/issue' <<EOF
\S{PRETTY_NAME} \n \l
$CT_INTERFACE_NAME: \4{$CT_INTERFACE_NAME}
EOF
# Install docker
if [ $CT_INSTALL_DOCKER -eq 1 ]; then
# Wait for network -- Source: https://stackoverflow.com/a/24963234
cat | pct exec $CT_ID -- sh <<'EOF'
WAIT_FOR_HOST=google.com
while ! (ping -c 1 -W 1 $WAIT_FOR_HOST > /dev/null 2>&1); do
echo "Waiting for $WAIT_FOR_HOST - network interface might be down..."
sleep 1
done
EOF
if [ "$CT_OSTYPE" == 'ubuntu' ]; then
cat | pct exec $CT_ID -- sh <<'EOF'
# Install docker -- Source: https://docs.docker.com/engine/install/ubuntu/
apt-get update
apt-get install -y ca-certificates curl gnupg lsb-release
mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
apt-get update -y
apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose
EOF
fi
if [ "$CT_OSTYPE" == 'debian' ]; then
cat | pct exec $CT_ID -- sh <<'EOF'
# Install docker -- Source: https://docs.docker.com/engine/install/debian/
apt-get update
apt-get install -y ca-certificates curl gnupg lsb-release
mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
apt-get update -y
apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose
EOF
fi
if [ "$CT_OSTYPE" == 'alpine' ]; then
cat | pct exec $CT_ID -- sh <<'EOF'
# Install docker -- Source: https://wiki.alpinelinux.org/wiki/Docker
apk update
apk add docker docker-compose
rc-update add docker boot
service docker start
EOF
fi
# Assert that storage driver is 'overlay2'
pct exec $CT_ID docker info | grep -i 'storage driver: overlay2' > /dev/null
if [ $? -ne 0 ]; then
tput setaf 1
echo_err 'WARNING: Docker storage driver is not "overlay2".'
tput sgr0
fi
fi