[#30] ftp容器增加动态检测并更新dns.conf到share目录

src/metric/ftp/build/dns-publish.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+set -uo pipefail
+
+# Publish latest /private/argus/etc/dns.conf to ${FTP_BASE_PATH}/share/dns.conf
+
+SRC="/private/argus/etc/dns.conf"
+FTP_BASE_PATH="${FTP_BASE_PATH:-/private/argus/ftp}"
+DST_DIR="${FTP_BASE_PATH}/share"
+DST="${DST_DIR}/dns.conf"
+UID_VAL="${ARGUS_BUILD_UID:-2133}"
+GID_VAL="${ARGUS_BUILD_GID:-2015}"
+INTERVAL="${DNS_PUBLISH_INTERVAL:-10}"
+
+log() { echo "$(date '+%Y-%m-%d %H:%M:%S') [DNS-Publish] $*"; }
+
+mkdir -p "$DST_DIR" 2>/dev/null || true
+
+log "service start: SRC=$SRC DST=$DST interval=${INTERVAL}s"
+
+while true; do
+  if [[ -f "$SRC" ]]; then
+    # Only sync when content differs
+    if ! cmp -s "$SRC" "$DST" 2>/dev/null; then
+      tmp="${DST}.tmp"
+      if cp "$SRC" "$tmp" 2>/dev/null; then
+        mv -f "$tmp" "$DST"
+        chown "$UID_VAL":"$GID_VAL" "$DST" 2>/dev/null || true
+        chmod 0644 "$DST" 2>/dev/null || true
+        ts_src=$(date -r "$SRC" '+%Y-%m-%dT%H:%M:%S%z' 2>/dev/null || echo "?")
+        log "synced dns.conf (src mtime=$ts_src) -> $DST"
+      else
+        log "ERROR: copy failed $SRC -> $tmp"
+      fi
+    fi
+  else
+    log "waiting for source $SRC"
+  fi
+  sleep "$INTERVAL"
+done
+