From 6c8c854d3c59397d4a5a312632a14591df504259 Mon Sep 17 00:00:00 2001
From: Dave O'Connor <git@mail.andvari.net>
Date: Sun, 12 Nov 2023 16:52:23 +0000
Subject: [PATCH] Docker ENV and entrypoint changes:

  - Use ENV for configuration of what to do with clouddns-sync.
  - Use an entrypoint.sh to properly run things.
  - Explicit release naming in dockerfile.
---
 Dockerfile    | 33 +++++++++++++++++++++++++--------
 entrypoint.sh | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 8 deletions(-)
 create mode 100644 entrypoint.sh

diff --git a/Dockerfile b/Dockerfile
index b1f0cb4..bdb5b4f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,29 @@
 FROM golang:1.21
+RUN go install github.com/gerrowadat/clouddns-sync@0.0.6
 
-WORKDIR /app
-COPY go.mod go.sum ./
-RUN go mod download
-COPY *.go ./
+COPY entrypoint.sh /
+RUN chmod +x /entrypoint.sh
 
-# Build
-RUN CGO_ENABLED=0 GOOS=linux go build -o /clouddns-sync
+USER root
+
+# Interval between runs.
+ENV GCLOUD_DNS_INTERVAL_SECS=86400
+
+# gcloud specifiers
+ENV GCLOUD_VERB "dynrecord"
+ENV GCLOUD_DNS_ZONE ""
+ENV GCLOUD_DYN_RECORD_NAME ""
+
+# nomad specifiers
+ENV NOMAD_SERVER_URI ""
+ENV NOMAD_TOKEN_FILE ""
+
+# json credentials file location
+ENV JSON_KEYFILE ""
+
+# zonefile location
+ENV ZONEFILENAME ""
+
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["/entrypoint.sh"]
 
-# Run
-ENTRYPOINT ["/clouddns-sync"]
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100644
index 0000000..020e868
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,36 @@
+#!/usr/bin/bash
+
+set -e
+
+while true
+do
+  echo "Doing $GCLOUD_VERB for zone $GCLOUD_DNS_ZONE"
+
+  case $GCLOUD_VERB in
+    nomad_sync)
+      clouddns-sync \
+        --cloud-dns-zone=$GCLOUD_DNS_ZONE \
+        --json-keyfile=$JSON_KEYFILE \
+        --nomad-server-uri=$NOMAD_SERVER_URI \
+        --nomad-token_file=$NOMAD_TOKEN_FILE \
+        $GCLOUD_VERB
+              ;;
+    getzonefile | putzonefile)
+      clouddns-sync \
+        --cloud-dns-zone=$GCLOUD_DNS_ZONE \
+        --json-keyfile=$JSON_KEYFILE \
+        -zonefilename=$ZONEFILENAME \
+        $GCLOUD_VERB
+              ;;
+    dynrecord)
+      clouddns-sync \
+        --cloud-dns-zone=$GCLOUD_DNS_ZONE \
+        --cloud-dns-dyn-record-name=$GCLOUD_DYN_RECORD_NAME \
+        --json-keyfile=$JSON_KEYFILE \
+        $GCLOUD_VERB
+              ;;
+  esac
+
+  echo "Sleeping for $GCLOUD_DNS_INTERVAL_SECS seconds..."
+  sleep $GCLOUD_DNS_INTERVAL_SECS
+done