diff --git a/Dockerfile b/Dockerfile
index befa27f..2c09edd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,36 +1,20 @@
-# ===============================
-# Stage 1: kubectl
-# ===============================
-FROM bitnami/kubectl AS kubectl
-
-
-# ===============================
-# Stage 2: runtime
-# ===============================
 FROM python:3.11-slim
 
-# kubectl 복사
-COPY --from=kubectl /opt/bitnami/kubectl/bin/kubectl /usr/local/bin/kubectl
+RUN apt-get update && \
+    apt-get install -y curl && \
+    curl -LO https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl && \
+    install -m 0755 kubectl /usr/local/bin/kubectl && \
+    rm -rf /var/lib/apt/lists/*
 
-# 필수 패키지
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    ca-certificates \
- && rm -rf /var/lib/apt/lists/*
-
-# python 패키지
-RUN pip install --no-cache-dir ruamel.yaml
-
-# 작업 디렉토리
 WORKDIR /app
 
-# 스크립트 복사
-COPY migrate.py /app/migrate.py
+COPY migrator.py mapping.yaml app.py requirements.txt ./
+COPY templates ./templates
 
-# 기본 mapping.yaml
-COPY mapping.yaml /app/mapping.yaml
+RUN pip install --no-cache-dir -r requirements.txt gunicorn
 
-# 실행 권한
-RUN chmod +x /app/migrate.py
+RUN mkdir /work
 
-# 기본 엔트리포인트
-ENTRYPOINT ["python", "/app/migrate.py"]
+EXPOSE 8080
+
+CMD ["gunicorn", "-b", "0.0.0.0:8080", "--timeout", "300", "app:app"]
diff --git a/app.py b/app.py
new file mode 100644
index 0000000..e018a56
--- /dev/null
+++ b/app.py
@@ -0,0 +1,117 @@
+from flask import Flask, render_template, request, send_file, abort
+import subprocess
+import uuid
+import shutil
+from pathlib import Path
+from datetime import datetime
+import zipfile
+
+#app = Flask(__name__)
+app = Flask(__name__, static_folder="static")
+
+BASE = Path("/work")
+BASE.mkdir(exist_ok=True)
+
+
+def ts():
+    return datetime.now().strftime("%Y-%m-%d-%H-%M-%S")
+
+
+@app.route("/", methods=["GET", "POST"])
+def index():
+    if request.method == "POST":
+        job_id = str(uuid.uuid4())
+        job_dir = BASE / job_id
+        job_dir.mkdir(parents=True)
+
+        cmd = [
+            "python3",
+            "/app/migrator.py",
+            "--split",
+            "--mapping", "/app/mapping.yaml",
+        ]
+
+        if request.form.get("from_class"):
+            cmd += ["--from-ingress-class", request.form["from_class"]]
+
+        if request.form.get("to_class"):
+            cmd += ["--ingress-class", request.form["to_class"]]
+
+        if request.form.get("namespace"):
+            cmd += ["--namespace", request.form["namespace"]]
+
+        subprocess.check_call(cmd, cwd=job_dir)
+
+        timestamp = ts()
+
+        # result.zip (yaml + report)
+        result_zip = BASE / f"{timestamp}-result.zip"
+        with zipfile.ZipFile(result_zip, "w", zipfile.ZIP_DEFLATED) as z:
+            for p in (job_dir / "yaml").rglob("*"):
+                z.write(p, p.relative_to(job_dir))
+            report = job_dir / "migration-report.md"
+            if report.exists():
+                z.write(report, report.relative_to(job_dir))
+
+        # backup.zip
+        backup_zip = BASE / f"{timestamp}-backup.zip"
+        with zipfile.ZipFile(backup_zip, "w", zipfile.ZIP_DEFLATED) as z:
+            for p in (job_dir / "backup").rglob("*"):
+                z.write(p, p.relative_to(job_dir))
+
+        return preview(job_id, result_zip.name, backup_zip.name)
+
+    return render_template("index.html")
+
+
+@app.route("/preview/<job_id>/<result_zip>/<backup_zip>")
+def preview(job_id, result_zip, backup_zip):
+    job_dir = BASE / job_id
+
+    def tree(root: Path):
+        t = {}
+        if not root.exists():
+            return t
+        for ns in sorted(root.iterdir()):
+            if ns.is_dir():
+                t[ns.name] = sorted(f.name for f in ns.iterdir() if f.is_file())
+        return t
+
+    return render_template(
+        "preview.html",
+        job_id=job_id,
+        yaml_tree=tree(job_dir / "yaml"),
+        backup_tree=tree(job_dir / "backup"),
+        result_zip=result_zip,
+        backup_zip=backup_zip,
+    )
+
+
+@app.route("/view/<job_id>/<kind>/<path:path>")
+def view_file(job_id, kind, path):
+    if kind not in ("yaml", "backup"):
+        abort(404)
+    f = BASE / job_id / kind / path
+    if not f.exists():
+        abort(404)
+    return f"<pre>{f.read_text()}</pre>"
+
+
+@app.route("/report/<job_id>")
+def view_report(job_id):
+    report = BASE / job_id / "migration-report.md"
+    if not report.exists():
+        abort(404)
+    return f"<pre>{report.read_text()}</pre>"
+
+
+@app.route("/download/<name>")
+def download(name):
+    path = BASE / name
+    if not path.exists():
+        abort(404)
+    return send_file(path, as_attachment=True)
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8080, debug=False)
diff --git a/migrator.py b/migrator.py
new file mode 100644
index 0000000..c569702
--- /dev/null
+++ b/migrator.py
@@ -0,0 +1,313 @@
+#!/usr/bin/env python3
+import argparse
+import subprocess
+from copy import deepcopy
+from pathlib import Path
+from collections import defaultdict
+
+from ruamel.yaml import YAML
+
+
+# -----------------------------
+# YAML 설정
+# -----------------------------
+yaml = YAML()
+yaml.preserve_quotes = True
+yaml.indent(mapping=2, sequence=4, offset=2)
+yaml.width = 4096
+
+
+# -----------------------------
+# kubectl ingress 조회
+# -----------------------------
+def kubectl_ingress(namespace=None):
+    cmd = ["kubectl", "get", "ingress"]
+
+    if namespace:
+        cmd += ["-n", namespace]
+    else:
+        cmd.append("--all-namespaces")
+
+    cmd += ["-o", "yaml"]
+
+    out = subprocess.check_output(cmd)
+    return yaml.load(out)
+
+
+# -----------------------------
+# mapping.yaml 로드
+# -----------------------------
+def load_mapping(path):
+    with open(path) as f:
+        return yaml.load(f)
+
+
+# -----------------------------
+# annotation 렌더링
+# -----------------------------
+def render_annotations_block(unsupported, partial, converted):
+    lines = []
+
+    if unsupported:
+        note = unsupported[0]["note"]
+        lines.append(f"    # {note}")
+        for u in unsupported:
+            lines.append(f"    #{u['key']}: {u['value']}")
+        lines.append("")
+
+    if partial:
+        for p in partial:
+            lines.append(f"    # PARTIAL SUPPORT: {p['note']}")
+            lines.append(f"    {p['haproxy']}: \"{str(p['value'])}\"")
+        lines.append("")
+
+    for c in converted:
+        lines.append(f"    {c['haproxy']}: \"{str(c['value'])}\"")
+
+    return "\n".join(lines)
+
+
+# -----------------------------
+# metadata 정리
+# -----------------------------
+def cleanup_metadata(meta):
+    for k in [
+        "creationTimestamp",
+        "generation",
+        "resourceVersion",
+        "uid",
+        "managedFields",
+    ]:
+        meta.pop(k, None)
+
+
+# -----------------------------
+# ingressClassName 기준 필터링
+# -----------------------------
+def filter_by_ingress_class(data, from_ingress_class):
+    filtered = deepcopy(data)
+    filtered["items"] = []
+
+    for item in data.get("items", []):
+        spec = item.get("spec", {})
+        current_class = spec.get("ingressClassName", "nginx")
+
+        if current_class == from_ingress_class:
+            filtered["items"].append(item)
+
+    return filtered
+
+
+# -----------------------------
+# 변환 전 원본 백업 (backup/ns/ingress.yaml)
+# -----------------------------
+def backup_original_ingress(data, backup_dir="./backup"):
+    base = Path(backup_dir)
+    base.mkdir(parents=True, exist_ok=True)
+
+    for item in data.get("items", []):
+        meta = item.get("metadata", {})
+        name = meta.get("name")
+        namespace = meta.get("namespace", "default")
+
+        ns_dir = base / namespace
+        ns_dir.mkdir(parents=True, exist_ok=True)
+
+        with (ns_dir / f"{name}.yaml").open("w") as f:
+            yaml.dump(item, f)
+
+
+# -----------------------------
+# ingress 변환 로직
+# -----------------------------
+def migrate_ingress(data, mapping, to_ingress_class=None):
+    report = {
+        "converted": [],
+        "partial": [],
+        "unsupported": [],
+        "detail": defaultdict(lambda: {"partial": [], "unsupported": []}),
+    }
+
+    new = deepcopy(data)
+
+    for item in new.get("items", []):
+        meta = item.setdefault("metadata", {})
+        spec = item.setdefault("spec", {})
+
+        cleanup_metadata(meta)
+
+        name = meta.get("name")
+        namespace = meta.get("namespace", "default")
+        ingress_id = f"{namespace}/{name}"
+
+        if to_ingress_class:
+            spec["ingressClassName"] = to_ingress_class
+
+        anns = meta.get("annotations", {}) or {}
+
+        unsupported = []
+        partial = []
+        converted = []
+
+        for k, v in anns.items():
+            rule = mapping.get(k)
+
+            if not rule:
+                converted.append({"haproxy": k, "value": v})
+                continue
+
+            support = rule.get("support", "unsupported")
+            haproxy_key = rule.get("haproxy")
+            note = rule.get("note", "no HAProxy equivalent")
+
+            if support == "full" and haproxy_key:
+                converted.append({"haproxy": haproxy_key, "value": v})
+                report["converted"].append(k)
+
+            elif support == "partial" and haproxy_key:
+                partial.append({"haproxy": haproxy_key, "value": v, "note": note})
+                report["partial"].append(k)
+                report["detail"][ingress_id]["partial"].append(
+                    {"nginx": k, "haproxy": haproxy_key, "note": note}
+                )
+            else:
+                unsupported.append({"key": k, "value": v, "note": note})
+                report["unsupported"].append(k)
+                report["detail"][ingress_id]["unsupported"].append(
+                    {"nginx": k, "value": v, "note": note}
+                )
+
+        meta.pop("annotations", None)
+        item["_rendered_annotations"] = render_annotations_block(
+            unsupported, partial, converted
+        )
+
+    return new, report
+
+
+# -----------------------------
+# 리포트 생성
+# -----------------------------
+def write_report(report, path):
+    with open(path, "w") as f:
+        f.write("# Ingress Migration Report\n\n")
+        f.write("## Summary\n")
+        f.write(f"- Converted  : {len(report['converted'])}\n")
+        f.write(f"- Partial    : {len(report['partial'])}\n")
+        f.write(f"- Unsupported: {len(report['unsupported'])}\n\n")
+        f.write("---\n\n")
+
+        for ingress, detail in report["detail"].items():
+            if not detail["partial"] and not detail["unsupported"]:
+                continue
+
+            f.write(f"## {ingress}\n\n")
+
+            for p in detail["partial"]:
+                f.write(
+                    f"- PARTIAL {p['nginx']} → {p['haproxy']}\n"
+                    f"  - note: {p['note']}\n"
+                )
+
+            for u in detail["unsupported"]:
+                f.write(
+                    f"- UNSUPPORTED {u['nginx']}\n"
+                    f"  - note: {u['note']}\n"
+                )
+
+            f.write("\n")
+
+
+# -----------------------------
+# 파일 저장 (yaml/ns/ingress.yaml)
+# -----------------------------
+def save_split(data, out_dir="./yaml"):
+    base = Path(out_dir)
+    base.mkdir(parents=True, exist_ok=True)
+
+    for item in data.get("items", []):
+        rendered = item.pop("_rendered_annotations", "")
+        meta = item["metadata"]
+        name = meta["name"]
+        namespace = meta.get("namespace", "default")
+
+        ns_dir = base / namespace
+        ns_dir.mkdir(parents=True, exist_ok=True)
+
+        path = ns_dir / f"{name}.yaml"
+
+        with path.open("w") as f:
+            yaml.dump(item, f)
+
+        if rendered:
+            content = path.read_text()
+            content = content.replace(
+                "metadata:\n",
+                "metadata:\n  annotations:\n" + rendered + "\n",
+                1,
+            )
+            path.write_text(content)
+
+
+# -----------------------------
+# main
+# -----------------------------
+def main():
+    parser = argparse.ArgumentParser(
+        description="nginx ingress → HAProxy ingress migration utility"
+    )
+    parser.add_argument("--mapping", default="mapping.yaml")
+    parser.add_argument("--split", action="store_true")
+    parser.add_argument("--out", default="./yaml")
+    parser.add_argument("--ingress-class", help="target ingressClassName")
+    parser.add_argument(
+        "--from-ingress-class",
+        default="nginx",
+        help="source ingressClassName (default: nginx)",
+    )
+    parser.add_argument(
+        "--namespace",
+        help="target namespace (default: all namespaces)",
+    )
+    parser.add_argument("--report", default="migration-report.md")
+
+    args = parser.parse_args()
+
+    if not args.split:
+        parser.error("--split must be specified")
+
+    # 디렉토리 보장
+    Path("./backup").mkdir(parents=True, exist_ok=True)
+    Path(args.out).mkdir(parents=True, exist_ok=True)
+
+    ingress = kubectl_ingress(args.namespace)
+
+    ingress = filter_by_ingress_class(
+        ingress,
+        args.from_ingress_class,
+    )
+
+    backup_original_ingress(ingress)
+
+    mapping = load_mapping(args.mapping)
+
+    converted, report = migrate_ingress(
+        ingress,
+        mapping,
+        to_ingress_class=args.ingress_class,
+    )
+
+    save_split(converted, args.out)
+    write_report(report, args.report)
+
+    print("\n=== Migration Summary ===")
+    print(f"Converted  : {len(report['converted'])}")
+    print(f"Partial    : {len(report['partial'])}")
+    print(f"Unsupported: {len(report['unsupported'])}")
+    print(f"Backup     : ./backup/<namespace>/<ingress>.yaml")
+    print(f"Output     : {args.out}/<namespace>/<ingress>.yaml")
+    print(f"Report     : {args.report}")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..433345b
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,3 @@
+flask
+ruamel.yaml
+gunicorn
diff --git a/static/style.css b/static/style.css
new file mode 100644
index 0000000..2c9e445
--- /dev/null
+++ b/static/style.css
@@ -0,0 +1,73 @@
+body {
+  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
+  margin: 0;
+  background: #0f172a;
+  color: #e5e7eb;
+}
+
+.container {
+  max-width: 1100px;
+  margin: 40px auto;
+  padding: 24px;
+}
+
+.card {
+  background: #020617;
+  border: 1px solid #1e293b;
+  border-radius: 10px;
+  padding: 20px;
+  margin-bottom: 24px;
+}
+
+h1, h2, h3, h4 {
+  margin-top: 0;
+}
+
+label {
+  font-size: 14px;
+  color: #94a3b8;
+}
+
+input {
+  width: 100%;
+  padding: 10px;
+  margin: 6px 0 14px;
+  border-radius: 6px;
+  border: 1px solid #334155;
+  background: #020617;
+  color: #e5e7eb;
+}
+
+button {
+  background: #2563eb;
+  color: white;
+  border: none;
+  padding: 10px 18px;
+  border-radius: 6px;
+  cursor: pointer;
+}
+
+button:hover {
+  background: #1d4ed8;
+}
+
+a {
+  color: #60a5fa;
+  text-decoration: none;
+}
+
+a:hover {
+  text-decoration: underline;
+}
+
+ul {
+  padding-left: 18px;
+}
+
+pre {
+  background: #020617;
+  border: 1px solid #1e293b;
+  border-radius: 8px;
+  padding: 16px;
+  overflow-x: auto;
+}
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..d62ad0d
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Ingress Migrator</title>
+  <link rel="stylesheet" href="/static/style.css">
+</head>
+<body>
+<div class="container">
+  <h1>Ingress Migrator</h1>
+
+  <div class="card">
+    <form method="post">
+      <label>From ingressClass</label>
+      <input name="from_class" value="nginx">
+
+      <label>To ingressClass</label>
+      <input name="to_class" value="haproxy">
+
+      <label>Namespace (optional)</label>
+      <input name="namespace">
+
+      <button type="submit">Run Migration</button>
+    </form>
+  </div>
+</div>
+</body>
+</html>
diff --git a/templates/preview.html b/templates/preview.html
new file mode 100644
index 0000000..93b07cb
--- /dev/null
+++ b/templates/preview.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Result</title>
+  <link rel="stylesheet" href="/static/style.css">
+</head>
+<body>
+<div class="container">
+
+  <h1>Migration Result</h1>
+
+  <div class="card">
+    <h2>Converted YAML</h2>
+    {% for ns, files in yaml_tree.items() %}
+      <h4>{{ ns }}</h4>
+      <ul>
+        {% for f in files %}
+          <li><a href="/view/{{ job_id }}/yaml/{{ ns }}/{{ f }}">{{ f }}</a></li>
+        {% endfor %}
+      </ul>
+    {% endfor %}
+  </div>
+
+  <div class="card">
+    <h2>Original Backup</h2>
+    {% for ns, files in backup_tree.items() %}
+      <h4>{{ ns }}</h4>
+      <ul>
+        {% for f in files %}
+          <li><a href="/view/{{ job_id }}/backup/{{ ns }}/{{ f }}">{{ f }}</a></li>
+        {% endfor %}
+      </ul>
+    {% endfor %}
+  </div>
+
+  <div class="card">
+    <a href="/report/{{ job_id }}">📄 migration-report.md</a><br><br>
+    <a href="/download/{{ result_zip }}">⬇ result.zip</a><br>
+    <a href="/download/{{ backup_zip }}">⬇ backup.zip</a>
+  </div>
+
+</div>
+</body>
+</html>
diff --git a/templates/report.html b/templates/report.html
new file mode 100644
index 0000000..de66ff5
--- /dev/null
+++ b/templates/report.html
@@ -0,0 +1,2 @@
+<h2>Migration Report</h2>
+<pre>{{ content }}</pre>