create_container.sh

#!/usr/bin/env bash

# project: https://github.com/fiveangle/proxmox_portainer_lxc
# synopsis: Creates Portainer/docker environment nested within a Proxmox LXC container
# author: Dave Johnson, fiveangle@gmail.com
# date: 13mar2021
# license: GPL 3.0 https://www.gnu.org/licenses/gpl-3.0.en.html
# contribs: Dave Johnson <fiveangle@gmail.com> https://github.com/fiveangle 
#           Actpo Homoc https://github.com/Actpohomoc
#           whiskerz007 https://github.com/whiskerz007

# Set your desired container parameters
PORTAINER_VERSION=portainer-ce  # 1.x=portainer, 2.x=portainer-ce
HOSTNAME=portainer
DISK_SIZE=64G



# Create temporary container environment setup script
CONTAINER_ENV_SETUP_SCRIPT=$(mktemp)
trap "rm -f $CONTAINER_ENV_SETUP_SCRIPT" 0 2 3 15

###################################################
#### BEGIN embedded CONTAINER_ENV_SETUP_SCRIPT
###################################################
cat > $CONTAINER_ENV_SETUP_SCRIPT <<EOF_MASTER
#!/usr/bin/env bash

# Setup script environment
set -o errexit  #Exit immediately if a pipeline returns a non-zero status
set -o errtrace #Trap ERR from shell functions, command substitutions, and commands from subshell
set -o nounset  #Treat unset variables as an error
set -o pipefail #Pipe will exit with last non-zero status if applicable
shopt -s expand_aliases
alias die='EXIT=\$? LINE=\$LINENO error_exit'
trap die ERR
trap 'die "Script interrupted."' INT

function error_exit() {
  trap - ERR
  local DEFAULT='Unknown failure occured.'
  local REASON="\e[97m\${1:-\$DEFAULT}\e[39m"
  local FLAG="\e[91m[ERROR:LXC] \e[93m\$EXIT@\$LINE"
  msg "\$FLAG \$REASON"
  exit \$EXIT
}
function msg() {
  local TEXT="\$1"
  echo -e "\$TEXT"
}

# Prepare container OS
msg "Setting up container OS..."
sed -i "/\$LANG/ s/\\(^# \\)//" /etc/locale.gen
locale-gen >/dev/null
apt-get -y purge openssh-{client,server} >/dev/null
apt-get autoremove >/dev/null

# Update container OS
msg "Updating container OS..."
apt-get update >/dev/null
apt-get -qqy upgrade &>/dev/null

# Install prerequisites
msg "Installing prerequisites..."
apt-get -qqy install \\
    curl &>/dev/null

# Customize Docker configuration
msg "Customizing Docker..."
DOCKER_CONFIG_PATH='/etc/docker/daemon.json'
mkdir -p \$(dirname \$DOCKER_CONFIG_PATH)
cat >\$DOCKER_CONFIG_PATH <<'EOF'
{
  "log-driver": "journald"
}
EOF

# Install Docker
msg "Installing Docker..."
sh <(curl -sSL https://get.docker.com) &>/dev/null

# Install Portainer
msg "Installing Portainer $PORTAINER_VERSION..."
docker volume create portainer_data >/dev/null
docker run -d \\
  -p 8000:8000 \\
  -p 9000:9000 \\
  --name=portainer \\
  --restart=unless-stopped \\
  -v /var/run/docker.sock:/var/run/docker.sock \\
  -v portainer_data:/data \\
  portainer/$PORTAINER_VERSION &>/dev/null

# Customize container
msg "Customizing container..."
rm /etc/motd # Remove message of the day after login
rm /etc/update-motd.d/10-uname # Remove kernel information after login
touch ~/.hushlogin # Remove 'Last login: ' and mail notification after login
GETTY_OVERRIDE="/etc/systemd/system/container-getty@1.service.d/override.conf"
mkdir -p \$(dirname \$GETTY_OVERRIDE)
cat << EOF > \$GETTY_OVERRIDE
[Service]
ExecStart=
ExecStart=-/sbin/agetty --autologin root --noclear --keep-baud tty%I 115200,38400,9600 \\\$TERM
EOF
systemctl daemon-reload
systemctl restart \$(basename \$(dirname \$GETTY_OVERRIDE) | sed 's/\\.d//')

# Cleanup container
msg "Cleanup..."
apt-get autoclean
rm -rf /setup.sh /var/{cache,log}/* /var/lib/apt/lists/*
EOF_MASTER
#################################################
#### END embedded CONTAINER_ENV_SETUP_SCRIPT
#################################################

# Setup script environment
set -o errexit  #Exit immediately if a pipeline returns a non-zero status
set -o errtrace #Trap ERR from shell functions, command substitutions, and commands from subshell
set -o nounset  #Treat unset variables as an error
set -o pipefail #Pipe will exit with last non-zero status if applicable
shopt -s expand_aliases
alias die='EXIT=$? LINE=$LINENO error_exit'
trap die ERR
trap cleanup EXIT

function error_exit() {
  trap - ERR
  local DEFAULT='Unknown failure occured.'
  local REASON="\e[97m${1:-$DEFAULT}\e[39m"
  local FLAG="\e[91m[ERROR] \e[93m$EXIT@$LINE"
  msg "$FLAG $REASON"
  [ ! -z ${CTID-} ] && cleanup_ctid
  exit $EXIT
}
function warn() {
  local REASON="\e[97m$1\e[39m"
  local FLAG="\e[93m[WARNING]\e[39m"
  msg "$FLAG $REASON"
}
function info() {
  local REASON="$1"
  local FLAG="\e[36m[INFO]\e[39m"
  msg "$FLAG $REASON"
}
function msg() {
  local TEXT="$1"
  echo -e "$TEXT"
}
function cleanup_ctid() {
  if [ ! -z ${MOUNT+x} ]; then
    pct unmount $CTID
  fi
  if $(pct status $CTID &>/dev/null); then
    if [ "$(pct status $CTID | awk '{print $2}')" == "running" ]; then
      pct stop $CTID
    fi
    pct destroy $CTID
  elif [ "$(pvesm list $STORAGE --vmid $CTID)" != "" ]; then
    pvesm free $ROOTFS
  fi
}
function cleanup() {
  popd >/dev/null
  rm -rf $TEMP_DIR
}
function load_module() {
  if ! $(lsmod | grep -Fq $1); then
    modprobe $1 &>/dev/null || \
      die "Failed to load '$1' module."
  fi
  MODULES_PATH=/etc/modules
  if ! $(grep -Fxq "$1" $MODULES_PATH); then
    echo "$1" >> $MODULES_PATH || \
      die "Failed to add '$1' module to load at boot."
  fi
}
TEMP_DIR=$(mktemp -d)
pushd $TEMP_DIR >/dev/null

# Download setup script
#wget -qL https://github.com/fiveangle/proxmox_portainer_lxc/raw/master/setup.sh
#cp /root/install/setup.sh ./

# Detect modules and automatically load at boot
load_module aufs
load_module overlay

# Select storage location
while read -r line; do
  TAG=$(echo $line | awk '{print $1}')
  TYPE=$(echo $line | awk '{printf "%-10s", $2}')
  FREE=$(echo $line | numfmt --field 4-6 --from-unit=K --to=iec --format %.2f | awk '{printf( "%9sB", $6)}')
  ITEM="  Type: $TYPE Free: $FREE "
  OFFSET=2
  if [[ $((${#ITEM} + $OFFSET)) -gt ${MSG_MAX_LENGTH:-} ]]; then
    MSG_MAX_LENGTH=$((${#ITEM} + $OFFSET))
  fi
  STORAGE_MENU+=( "$TAG" "$ITEM" "OFF" )
done < <(pvesm status -content rootdir | awk 'NR>1')
if [ $((${#STORAGE_MENU[@]}/3)) -eq 0 ]; then
  warn "'Container' needs to be selected for at least one storage location."
  die "Unable to detect valid storage location."
elif [ $((${#STORAGE_MENU[@]}/3)) -eq 1 ]; then
  STORAGE=${STORAGE_MENU[0]}
else
  while [ -z "${STORAGE:+x}" ]; do
    STORAGE=$(whiptail --title "Storage Pools" --radiolist \
    "Which storage pool you would like to use for the container?\n\n" \
    16 $(($MSG_MAX_LENGTH + 23)) 6 \
    "${STORAGE_MENU[@]}" 3>&1 1>&2 2>&3) || exit
  done
fi
info "Using '$STORAGE' for storage location."

# Get the next guest VM/LXC ID
CTID=$(pvesh get /cluster/nextid)
info "Container ID is $CTID."

# Download latest Debian 10 LXC template
msg "Updating LXC template list..."
pveam update >/dev/null
msg "Downloading LXC template..."
OSTYPE=debian
OSVERSION=${OSTYPE}-10
mapfile -t TEMPLATES < <(pveam available -section system | sed -n "s/.*\($OSVERSION.*\)/\1/p" | sort -t - -k 2 -V)
TEMPLATE="${TEMPLATES[-1]}"
pveam download local $TEMPLATE >/dev/null ||
  die "A problem occured while downloading the LXC template."

# Create variables for container disk
STORAGE_TYPE=$(pvesm status -storage $STORAGE | awk 'NR>1 {print $2}')
case $STORAGE_TYPE in
  dir|nfs)
    DISK_EXT=".raw"
    DISK_REF="$CTID/"
    ;;
  zfspool)
    DISK_PREFIX="subvol"
    DISK_FORMAT="subvol"
    ;;
esac
DISK=${DISK_PREFIX:-vm}-${CTID}-disk-0${DISK_EXT-}
ROOTFS=${STORAGE}:${DISK_REF-}${DISK}

# Create LXC
msg "Creating LXC container..."
pvesm alloc $STORAGE $CTID $DISK $DISK_SIZE --format ${DISK_FORMAT:-raw} >/dev/null
if [ "$STORAGE_TYPE" == "zfspool" ]; then
  warn "Some containers may not work properly due to ZFS not supporting 'fallocate'."
else
  mkfs.ext4 $(pvesm path $ROOTFS) &>/dev/null
fi
ARCH=$(dpkg --print-architecture)
TEMPLATE_STRING="local:vztmpl/${TEMPLATE}"
pct create $CTID $TEMPLATE_STRING -arch $ARCH -features nesting=1 \
  -hostname $HOSTNAME -net0 name=eth0,bridge=vmbr0,ip=dhcp -onboot 1 \
  -ostype $OSTYPE -rootfs $ROOTFS,size=$DISK_SIZE -storage $STORAGE >/dev/null

# Modify LXC permissions to support Docker
LXC_CONFIG=/etc/pve/lxc/${CTID}.conf
cat <<EOF >> $LXC_CONFIG
lxc.cgroup.devices.allow: a
lxc.cap.drop:
EOF

# Set container description
pct set $CTID -description "Access Portainer interface using the following URL:

http://<IP_ADDRESS>:9000"

# Set container timezone to match host
MOUNT=$(pct mount $CTID | cut -d"'" -f 2)
ln -fs $(readlink /etc/localtime) ${MOUNT}/etc/localtime
pct unmount $CTID && unset MOUNT

# Setup container
msg "Starting LXC container..."
pct start $CTID
pct push $CTID $CONTAINER_ENV_SETUP_SCRIPT /setup.sh -perms 755
pct exec $CTID /setup.sh

# Get network details and show completion message
IP=$(pct exec $CTID ip a s dev eth0 | sed -n '/inet / s/\// /p' | awk '{print $2}')
info "Successfully created Portainer LXC to container ID $CTID."
msg "

Portainer is reachable by going to the following URLs:

      http://${IP}:9000
      http://${HOSTNAME}.local:9000

"