fix(emqx): increase disk to 6GB and add optional MQ disable prompt

EMQX 6.1+ preallocates significant disk space for the MQ feature,
causing high CPU/disk usage on small containers (emqx/emqx#16649).

- Increase default disk from 4GB to 6GB
- Add read -rp prompt during install to optionally disable MQ feature
  via mq.enable=false in emqx.conf (reduces disk/CPU overhead)
- Setting is in install script (not CT script) per reviewer feedback

Co-authored-by: sim-san <sim-san@users.noreply.github.com>

ct/emqx.sh

@@ -9,7 +9,7 @@ APP="EMQX"
 var_tags="${var_tags:-mqtt}"
 var_cpu="${var_cpu:-2}"
 var_ram="${var_ram:-1024}"
-var_disk="${var_disk:-4}"
+var_disk="${var_disk:-6}"
 var_os="${var_os:-debian}"
 var_version="${var_version:-13}"
 var_unprivileged="${var_unprivileged:-1}"

frontend/public/json/emqx.json

@@ -21,7 +21,7 @@
       "resources": {
         "cpu": 2,
         "ram": 1024,
-        "hdd": 4,
+        "hdd": 6,
         "os": "debian",
         "version": "13"
       }

install/emqx-install.sh

@@ -38,6 +38,18 @@ rm -f "$DEB_FILE"
 echo "$LATEST_VERSION" >~/.emqx
 msg_ok "Installed EMQX"
 
+read -r -p "${TAB3}Would you like to disable the EMQX MQ feature? (reduces disk/CPU usage) <y/N> " prompt
+if [[ ${prompt,,} =~ ^(y|yes)$ ]]; then
+  msg_info "Disabling EMQX MQ feature"
+  mkdir -p /etc/emqx
+  if ! grep -q "^mq.enable" /etc/emqx/emqx.conf 2>/dev/null; then
+    echo "mq.enable = false" >>/etc/emqx/emqx.conf
+  else
+    sed -i 's/^mq.enable.*/mq.enable = false/' /etc/emqx/emqx.conf
+  fi
+  msg_ok "Disabled EMQX MQ feature"
+fi
+
 msg_info "Starting EMQX service"
 $STD systemctl enable -q --now emqx
 msg_ok "Enabled EMQX service"

vm/archlinux-vm.sh

@@ -70,7 +70,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }
@@ -203,6 +203,7 @@ function exit-script() {
 
 function default_settings() {
   VMID=$(get_valid_nextid)
+  FORMAT=",efitype=4m"
   MACHINE=""
   DISK_SIZE="4G"
   DISK_CACHE=""
@@ -258,9 +259,11 @@ function advanced_settings() {
     3>&1 1>&2 2>&3); then
     if [ "$MACH" = q35 ]; then
       echo -e "${CONTAINERTYPE}${BOLD}${DGN}Machine Type: ${BGN}$MACH${CL}"
+      FORMAT=""
       MACHINE=" -machine q35"
     else
       echo -e "${CONTAINERTYPE}${BOLD}${DGN}Machine Type: ${BGN}$MACH${CL}"
+      FORMAT=",efitype=4m"
       MACHINE=""
     fi
   else
@@ -473,45 +476,31 @@ case $STORAGE_TYPE in
 nfs | dir | cifs)
   DISK_EXT=".qcow2"
   DISK_REF="$VMID/"
-  DISK_IMPORT="--format qcow2"
+  DISK_IMPORT="-format qcow2"
   THIN=""
   ;;
 btrfs)
   DISK_EXT=".raw"
   DISK_REF="$VMID/"
-  DISK_IMPORT="--format raw"
+  DISK_IMPORT="-format raw"
+  FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="--format raw"
-  ;;
 esac
+for i in {0,1}; do
+  disk="DISK$i"
+  eval DISK"${i}"=vm-"${VMID}"-disk-"${i}"${DISK_EXT:-}
+  eval DISK"${i}"_REF="${STORAGE}":"${DISK_REF:-}"${!disk}
+done
 
 msg_info "Creating a Arch Linux VM"
 qm create $VMID -agent 1${MACHINE} -tablet 0 -localtime 1 -bios ovmf${CPU_TYPE} -cores $CORE_COUNT -memory $RAM_SIZE \
   -name $HN -tags community-script -net0 virtio,bridge=$BRG,macaddr=$MAC$VLAN$MTU -onboot 1 -ostype l26 -scsihw virtio-scsi-pci
-
-if qm disk import --help >/dev/null 2>&1; then
-  IMPORT_CMD=(qm disk import)
-else
-  IMPORT_CMD=(qm importdisk)
-fi
-
-IMPORT_OUT="$("${IMPORT_CMD[@]}" "$VMID" "${FILE}" "$STORAGE" ${DISK_IMPORT:-} 2>&1 || true)"
-DISK_REF_IMPORTED="$(printf '%s\n' "$IMPORT_OUT" | sed -n "s/.*successfully imported disk '\([^']\+\)'.*/\1/p" | tr -d "\r\"'")"
-[[ -z "$DISK_REF_IMPORTED" ]] && DISK_REF_IMPORTED="$(pvesm list "$STORAGE" | awk -v id="$VMID" '$5 ~ ("vm-"id"-disk-") {print $1":"$5}' | sort | tail -n1)"
-[[ -z "$DISK_REF_IMPORTED" ]] && {
-  msg_error "Unable to determine imported disk reference."
-  echo "$IMPORT_OUT"
-  exit 1
-}
-msg_ok "Imported disk (${CL}${BL}${DISK_REF_IMPORTED}${CL})"
-
+pvesm alloc $STORAGE $VMID $DISK0 4M 1>&/dev/null
+qm importdisk $VMID ${FILE} $STORAGE ${DISK_IMPORT:-} 1>&/dev/null
 qm set $VMID \
-  -efidisk0 ${STORAGE}:0,efitype=4m \
-  -scsi0 ${DISK_REF_IMPORTED},${DISK_CACHE}${THIN%,} \
+  -efidisk0 ${DISK0_REF}${FORMAT} \
+  -scsi0 ${DISK1_REF},${DISK_CACHE}${THIN}size=${DISK_SIZE} \
   -ide2 ${STORAGE}:cloudinit \
   -boot order=scsi0 \
   -serial0 socket >/dev/null

vm/debian-13-vm.sh

@@ -70,7 +70,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }
@@ -560,11 +560,6 @@ btrfs)
   FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1}; do
   disk="DISK$i"

vm/debian-vm.sh

@@ -70,7 +70,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }
@@ -501,11 +501,6 @@ btrfs)
   FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1}; do
   disk="DISK$i"

vm/docker-vm.sh

@@ -45,7 +45,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }

vm/haos-vm.sh

@@ -74,7 +74,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }

vm/mikrotik-routeros.sh

@@ -71,7 +71,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }
@@ -566,11 +566,6 @@ zfspool)
   DISK_REF=""
   DISK_IMPORT="-format raw"
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 
 DISK_VAR="vm-${VMID}-disk-0${DISK_EXT:-}"

vm/nextcloud-vm.sh

@@ -70,7 +70,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }
@@ -487,11 +487,6 @@ btrfs)
   FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1,2}; do
   disk="DISK$i"

vm/openwrt-vm.sh

@@ -74,7 +74,7 @@ function error_handler() {
   local exit_code="$?"
   local line_number="$1"
   local command="$2"
-  post_update_to_api "failed" "$exit_code"
+  post_update_to_api "failed" "$command"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
   echo -e "\n$error_message\n"
   cleanup_vmid

vm/opnsense-vm.sh

@@ -48,7 +48,7 @@ function error_handler() {
   local exit_code="$?"
   local line_number="$1"
   local command="$2"
-  post_update_to_api "failed" "$exit_code"
+  post_update_to_api "failed" "$command"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
   echo -e "\n$error_message\n"
   cleanup_vmid
@@ -619,11 +619,6 @@ btrfs)
   FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1}; do
   disk="DISK$i"

vm/owncloud-vm.sh

@@ -71,7 +71,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }
@@ -500,11 +500,6 @@ btrfs)
   FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1,2}; do
   disk="DISK$i"

vm/pimox-haos-vm.sh

@@ -79,7 +79,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }
@@ -402,11 +402,6 @@ nfs | dir)
   DISK_REF="$VMID/"
   DISK_IMPORT="-format qcow2"
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1}; do
   disk="DISK$i"

vm/ubuntu2204-vm.sh

@@ -66,7 +66,7 @@ function error_handler() {
   local exit_code="$?"
   local line_number="$1"
   local command="$2"
-  post_update_to_api "failed" "$exit_code"
+  post_update_to_api "failed" "$command"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
   echo -e "\n$error_message\n"
   cleanup_vmid
@@ -482,11 +482,6 @@ btrfs)
   FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1}; do
   disk="DISK$i"

vm/ubuntu2404-vm.sh

@@ -69,7 +69,7 @@ function error_handler() {
   local exit_code="$?"
   local line_number="$1"
   local command="$2"
-  post_update_to_api "failed" "$exit_code"
+  post_update_to_api "failed" "$command"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
   echo -e "\n$error_message\n"
   cleanup_vmid
@@ -484,11 +484,6 @@ btrfs)
   FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1}; do
   disk="DISK$i"

vm/ubuntu2504-vm.sh

@@ -68,7 +68,7 @@ function error_handler() {
   local exit_code="$?"
   local line_number="$1"
   local command="$2"
-  post_update_to_api "failed" "$exit_code"
+  post_update_to_api "failed" "$command"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
   echo -e "\n$error_message\n"
   cleanup_vmid
@@ -483,11 +483,6 @@ btrfs)
   FORMAT=",efitype=4m"
   THIN=""
   ;;
-*)
-  DISK_EXT=""
-  DISK_REF=""
-  DISK_IMPORT="-format raw"
-  ;;
 esac
 for i in {0,1}; do
   disk="DISK$i"

vm/umbrel-os-vm.sh

@@ -69,7 +69,7 @@ function error_handler() {
   local line_number="$1"
   local command="$2"
   local error_message="${RD}[ERROR]${CL} in line ${RD}$line_number${CL}: exit code ${RD}$exit_code${CL}: while executing command ${YW}$command${CL}"
-  post_update_to_api "failed" "${exit_code}"
+  post_update_to_api "failed" "${command}"
   echo -e "\n$error_message\n"
   cleanup_vmid
 }