docs(readme): Uninstall script will remove pve lxc ip tags

README.md

@@ -50,3 +50,15 @@ rm -f /lib/systemd/system/lxc-iptag.service
 rm -f /usr/local/etc/lxc-iptag.conf
 rm -f /usr/local/bin/lxc-iptag
 ```
+
+If you want to remove all lxc-iptag related datas (includes all ip tags), run the following command:
+
+This script will:
+
+- Stop and disable `lxc-iptag` systemd service
+- Remove pve all lxc ip tags
+- Delete all lxc-iptag related systemd unit, config file and script
+
+```sh
+curl -sL https://github.com/gitsang/lxc-iptag/raw/main/uninstall.sh | bash
+```

uninstall.sh

@@ -6,6 +6,40 @@ set -xe
 systemctl stop lxc-iptag.service
 systemctl disable lxc-iptag.service
 
+# clean ip tags
+is_valid_ipv4() {
+    local ip=$1
+    local regex="^([0-9]{1,3}\.){3}[0-9]{1,3}$"
+
+    if [[ $ip =~ $regex ]]; then
+        IFS='.' read -r -a parts <<< "$ip"
+        for part in "${parts[@]}"; do
+            if ! [[ $part =~ ^[0-9]+$ ]] || ((part < 0 || part > 255)); then
+                return 1
+            fi
+        done
+        return 0
+    else
+        return 1
+    fi
+}
+vmid_list=$(pct list 2>/dev/null | grep -v VMID | awk '{print $1}')
+for vmid in ${vmid_list}; do
+    next_tags=()
+
+    # Parse current tags
+    mapfile -t current_tags < <(pct config "${vmid}" | grep tags | awk '{print $2}' | sed 's/;/\n/g')
+    for current_tag in "${current_tags[@]}"; do
+        if ! is_valid_ipv4 "${current_tag}"; then
+            next_tags+=("${current_tag}")
+        fi
+    done
+
+    # Set tags
+    echo "Setting ${vmid} tags from ${current_tags[*]} to ${next_tags[*]}"
+    pct set "${vmid}" -tags "$(IFS=';'; echo "${next_tags[*]}")"
+done
+
 # remove lxc-iptag
 rm -f /lib/systemd/system/lxc-iptag.service
 rm -f /usr/local/etc/lxc-iptag.conf