From c07cc6c6af5ff73e6086f8821699ea55777872a2 Mon Sep 17 00:00:00 2001
From: CzBiX <gliuwr@gmail.com>
Date: Mon, 22 Feb 2016 17:57:43 +0800
Subject: [PATCH] [docker] generate server config on first run

---
 tools/docker/Dockerfile           | 16 ++++++++++------
 tools/docker/README.md            |  8 ++++++--
 tools/docker/build.sh             |  4 ----
 tools/docker/docker-entrypoint.sh |  8 ++++++++
 tools/docker/gen-server-cfg.sh    |  1 +
 5 files changed, 25 insertions(+), 12 deletions(-)
 create mode 100755 tools/docker/docker-entrypoint.sh

diff --git a/tools/docker/Dockerfile b/tools/docker/Dockerfile
index bd3dd32b..a829585b 100644
--- a/tools/docker/Dockerfile
+++ b/tools/docker/Dockerfile
@@ -1,10 +1,14 @@
 FROM golang:latest
 
-RUN go get -u github.com/v2ray/v2ray-core
-RUN rm -f $GOPATH/bin/build
-RUN go install github.com/v2ray/v2ray-core/tools/build
-RUN $GOPATH/bin/build
+RUN go get -u github.com/v2ray/v2ray-core \
+  && rm -f $GOPATH/bin/build \
+  && go install github.com/v2ray/v2ray-core/tools/build \
+  && build \
+  && rm -rf pkg src
 
 EXPOSE 27183
-ADD server-cfg.json /go/server-cfg.json
-CMD /go/bin/v2ray-custom-linux-64/v2ray --config="/go/server-cfg.json"
+COPY gen-server-cfg.sh /go/gen-server-cfg.sh
+COPY docker-entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["/go/bin/v2ray-custom-linux-64/v2ray", "--config=/go/server-cfg.json"]
diff --git a/tools/docker/README.md b/tools/docker/README.md
index 69401a7b..8594ddf6 100644
--- a/tools/docker/README.md
+++ b/tools/docker/README.md
@@ -16,8 +16,12 @@ Then spin up a v2ray instance with:
 ./run.sh
 ```
 
-The build script will generate a server config file with random user id. You
-can get it from `server-cfg.json`.
+The docker image will generate a server config file with random user id on first run.
+You can get see it with:
+
+```bash
+docker logs v2ray
+```
 
 To tail the access log, run:
 
diff --git a/tools/docker/build.sh b/tools/docker/build.sh
index 677b15b6..001d8325 100755
--- a/tools/docker/build.sh
+++ b/tools/docker/build.sh
@@ -1,7 +1,3 @@
 #!/bin/bash
 
-if [ ! -e server-cfg.json ]; then
-        ./gen-server-config.sh
-fi
-
 docker build --rm=true --tag=$USER/v2ray ./
diff --git a/tools/docker/docker-entrypoint.sh b/tools/docker/docker-entrypoint.sh
new file mode 100755
index 00000000..db1a3427
--- /dev/null
+++ b/tools/docker/docker-entrypoint.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+set -e
+
+if [ ! -e "server-cfg.json" ]; then
+    ./gen-server-cfg.sh
+fi
+
+exec "$@"
diff --git a/tools/docker/gen-server-cfg.sh b/tools/docker/gen-server-cfg.sh
index 6974cd8a..4886746d 100755
--- a/tools/docker/gen-server-cfg.sh
+++ b/tools/docker/gen-server-cfg.sh
@@ -7,6 +7,7 @@ rand_str () {
 }
 
 ID="$(rand_str 8)-$(rand_str 4)-$(rand_str 4)-$(rand_str 4)-$(rand_str 12)"
+echo "Generated client ID: $ID"
 
 cat <<EOF > server-cfg.json
 {