fix(packaging): move templates/ into decnet/ package so they ship with pip install

The docker build contexts and syslog_bridge.py lived at repo root, which
meant setuptools (include = ["decnet*"]) never shipped them. Agents
installed via `pip install $RELEASE_DIR` got site-packages/decnet/** but no
templates/, so every deploy blew up in deployer._sync_logging_helper with
FileNotFoundError on templates/syslog_bridge.py.

Move templates/ -> decnet/templates/ and declare it as setuptools
package-data. Path resolutions in services/*.py and engine/deployer.py drop
one .parent since templates now lives beside the code. Test fixtures,
bandit exclude path, and coverage omit glob updated to match.

decnet/templates/elasticsearch/Dockerfile

@@ -0,0 +1,23 @@
+ARG BASE_IMAGE=debian:bookworm-slim
+FROM ${BASE_IMAGE}
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3 \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY syslog_bridge.py /opt/syslog_bridge.py
+COPY server.py /opt/server.py
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+EXPOSE 9200
+RUN useradd -r -s /bin/false -d /opt logrelay \
+ && apt-get update && apt-get install -y --no-install-recommends libcap2-bin \
+ && rm -rf /var/lib/apt/lists/* \
+ && (find /usr/bin/ -maxdepth 1 -name 'python3*' -type f -exec setcap 'cap_net_bind_service+eip' {} \; 2>/dev/null || true)
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+  CMD kill -0 1 || exit 1
+
+USER logrelay
+ENTRYPOINT ["/entrypoint.sh"]

decnet/templates/elasticsearch/entrypoint.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+set -e
+exec python3 /opt/server.py

decnet/templates/elasticsearch/server.py

@@ -0,0 +1,123 @@
+#!/usr/bin/env python3
+"""
+Elasticsearch server — presents a convincing ES 7.x HTTP API on port 9200.
+Logs all requests (especially recon probes like /_cat/, /_cluster/, /_nodes/)
+as JSON. Designed to attract automated scanners and credential stuffers.
+"""
+
+import json
+import os
+from http.server import BaseHTTPRequestHandler, HTTPServer
+from syslog_bridge import syslog_line, write_syslog_file, forward_syslog
+
+NODE_NAME = os.environ.get("NODE_NAME", "esserver")
+SERVICE_NAME   = "elasticsearch"
+LOG_TARGET = os.environ.get("LOG_TARGET", "")
+
+_CLUSTER_UUID = "xC3Pr9abTq2mNkOeLvXwYA"
+_NODE_UUID = "dJH7Lm2sRqWvPn0kFiEtBo"
+
+_ROOT_RESPONSE = {
+    "name": NODE_NAME,
+    "cluster_name": "elasticsearch",
+    "cluster_uuid": _CLUSTER_UUID,
+    "version": {
+        "number": "7.17.9",
+        "build_flavor": "default",
+        "build_type": "docker",
+        "build_hash": "ef48222227ee6b9e70e502f0f0daa52435ee634d",
+        "build_date": "2023-01-31T05:34:43.305517834Z",
+        "build_snapshot": False,
+        "lucene_version": "8.11.1",
+        "minimum_wire_compatibility_version": "6.8.0",
+        "minimum_index_compatibility_version": "6.0.0-beta1",
+    },
+    "tagline": "You Know, for Search",
+}
+
+
+
+
+def _log(event_type: str, severity: int = 6, **kwargs) -> None:
+    line = syslog_line(SERVICE_NAME, NODE_NAME, event_type, severity, **kwargs)
+    write_syslog_file(line)
+    forward_syslog(line, LOG_TARGET)
+
+
+class ESHandler(BaseHTTPRequestHandler):
+    server_version = "elasticsearch"
+    sys_version = ""
+
+    def _send_json(self, code: int, data: dict) -> None:
+        body = json.dumps(data).encode()
+        self.send_response(code)
+        self.send_header("Content-Type", "application/json; charset=UTF-8")
+        self.send_header("Content-Length", str(len(body)))
+        self.send_header("X-elastic-product", "Elasticsearch")
+        self.end_headers()
+        self.wfile.write(body)
+
+    def _read_body(self) -> str:
+        length = int(self.headers.get("Content-Length", 0))
+        return self.rfile.read(length).decode(errors="replace") if length else ""
+
+    def do_GET(self):
+        src = self.client_address[0]
+        path = self.path.split("?")[0]
+
+        if path in ("/", ""):
+            _log("root_probe", src=src, method="GET", path=self.path)
+            self._send_json(200, _ROOT_RESPONSE)
+        elif path.startswith("/_cat/"):
+            _log("cat_api", src=src, method="GET", path=self.path)
+            self._send_json(200, [])
+        elif path.startswith("/_cluster/"):
+            _log("cluster_recon", src=src, method="GET", path=self.path)
+            self._send_json(200, {"cluster_name": "elasticsearch", "status": "green",
+                                   "number_of_nodes": 3, "number_of_data_nodes": 3})
+        elif path.startswith("/_nodes"):
+            _log("nodes_recon", src=src, method="GET", path=self.path)
+            self._send_json(200, {"_nodes": {"total": 3, "successful": 3, "failed": 0}, "nodes": {}})
+        elif path.startswith("/_security/") or path.startswith("/_xpack/"):
+            _log("security_probe", src=src, method="GET", path=self.path)
+            self._send_json(200, {"enabled": True, "available": True})
+        else:
+            _log("request", src=src, method="GET", path=self.path)
+            self._send_json(404, {"error": {"root_cause": [{"type": "index_not_found_exception",
+                                                             "reason": "no such index"}]}})
+
+    def do_POST(self):
+        src = self.client_address[0]
+        body = self._read_body()
+        path = self.path.split("?")[0]
+        _log("post_request", src=src, method="POST", path=self.path,
+             body_preview=body[:300], user_agent=self.headers.get("User-Agent", ""))
+        if "_search" in path or "_bulk" in path:
+            self._send_json(200, {"took": 1, "timed_out": False, "hits": {"total": {"value": 0}, "hits": []}})
+        else:
+            self._send_json(200, {"result": "created", "_id": "1", "_index": "server"})
+
+    def do_PUT(self):
+        src = self.client_address[0]
+        body = self._read_body()
+        _log("put_request", src=src, method="PUT", path=self.path, body_preview=body[:300])
+        self._send_json(200, {"acknowledged": True})
+
+    def do_DELETE(self):
+        src = self.client_address[0]
+        _log("delete_request", src=src, method="DELETE", path=self.path)
+        self._send_json(200, {"acknowledged": True})
+
+    def do_HEAD(self):
+        src = self.client_address[0]
+        _log("head_request", src=src, method="HEAD", path=self.path)
+        self._send_json(200, {})
+
+    def log_message(self, fmt, *args):
+        pass  # suppress default HTTP server logging
+
+
+if __name__ == "__main__":
+    _log("startup", msg=f"Elasticsearch server starting as {NODE_NAME}")
+    server = HTTPServer(("0.0.0.0", 9200), ESHandler)  # nosec B104
+    server.serve_forever()

decnet/templates/elasticsearch/syslog_bridge.py

@@ -0,0 +1,89 @@
+#!/usr/bin/env python3
+"""
+Shared RFC 5424 syslog helper used by service containers.
+
+Services call syslog_line() to format an RFC 5424 message, then
+write_syslog_file() to emit it to stdout — the container runtime
+captures it, and the host-side collector streams it into the log file.
+
+RFC 5424 structure:
+  <PRI>1 TIMESTAMP HOSTNAME APP-NAME PROCID MSGID [SD-ELEMENT] MSG
+
+Facility: local0 (16). SD element ID uses PEN 55555.
+"""
+
+from datetime import datetime, timezone
+from typing import Any
+
+# ─── Constants ────────────────────────────────────────────────────────────────
+
+_FACILITY_LOCAL0 = 16
+_SD_ID = "relay@55555"
+_NILVALUE = "-"
+
+SEVERITY_EMERG   = 0
+SEVERITY_ALERT   = 1
+SEVERITY_CRIT    = 2
+SEVERITY_ERROR   = 3
+SEVERITY_WARNING = 4
+SEVERITY_NOTICE  = 5
+SEVERITY_INFO    = 6
+SEVERITY_DEBUG   = 7
+
+_MAX_HOSTNAME = 255
+_MAX_APPNAME  = 48
+_MAX_MSGID    = 32
+
+# ─── Formatter ────────────────────────────────────────────────────────────────
+
+def _sd_escape(value: str) -> str:
+    """Escape SD-PARAM-VALUE per RFC 5424 §6.3.3."""
+    return value.replace("\\", "\\\\").replace('"', '\\"').replace("]", "\\]")
+
+
+def _sd_element(fields: dict[str, Any]) -> str:
+    if not fields:
+        return _NILVALUE
+    params = " ".join(f'{k}="{_sd_escape(str(v))}"' for k, v in fields.items())
+    return f"[{_SD_ID} {params}]"
+
+
+def syslog_line(
+    service: str,
+    hostname: str,
+    event_type: str,
+    severity: int = SEVERITY_INFO,
+    timestamp: datetime | None = None,
+    msg: str | None = None,
+    **fields: Any,
+) -> str:
+    """
+    Return a single RFC 5424-compliant syslog line (no trailing newline).
+
+    Args:
+        service:    APP-NAME (e.g. "http", "mysql")
+        hostname:   HOSTNAME (node name)
+        event_type: MSGID    (e.g. "request", "login_attempt")
+        severity:   Syslog severity integer (default: INFO=6)
+        timestamp:  UTC datetime; defaults to now
+        msg:        Optional free-text MSG
+        **fields:   Encoded as structured data params
+    """
+    pri     = f"<{_FACILITY_LOCAL0 * 8 + severity}>"
+    ts      = (timestamp or datetime.now(timezone.utc)).isoformat()
+    host    = (hostname or _NILVALUE)[:_MAX_HOSTNAME]
+    appname = (service  or _NILVALUE)[:_MAX_APPNAME]
+    msgid   = (event_type or _NILVALUE)[:_MAX_MSGID]
+    sd      = _sd_element(fields)
+    message = f" {msg}" if msg else ""
+    return f"{pri}1 {ts} {host} {appname} {_NILVALUE} {msgid} {sd}{message}"
+
+
+def write_syslog_file(line: str) -> None:
+    """Emit a syslog line to stdout for container log capture."""
+    print(line, flush=True)
+
+
+def forward_syslog(line: str, log_target: str) -> None:
+    """No-op stub. TCP forwarding is handled by rsyslog, not by service containers."""
+    pass