Reverse proxy for Google Cloud Storage.
This is a reverse proxy for Google Cloud Storage for performing limited disclosure (IP address restriction etc...). Gets the URL of the GCS object through its internal API. Therefore, it is possible to make GCS objects private and deliver limited content.
+---------------------------------------+
| Nginx |
| access control (basic auth/ip) |
+-----+---------------------------------+
|
-----------------------------------------+
|
|
+------v-----+ +---------------+
| | | |
| gcsproxy | +------> | Google Cloud |
| | | Storage |
+------------+ +---------------+
Usage of gcsproxy:
-b string
Bind address (default "127.0.0.1:8080")
-c string
The path to the keyfile. If not present, client will use your default application credentials.
-v Show access log
The gcsproxy routing configuration is shown below.
"/{bucket:[0-9a-zA-Z-_.] +}/{object:. *}"
If you are running gcsproxy on localhost:8080 and you want to access the file gs://test-bucket/your/file/path.txt in GCS via gcsproxy,
you can use the URL You can access the file via gcsproxy at the URL http://localhost:8080/test-bucket/your/file/path.txt.
Dockerfile example
FROM debian:buster-slim AS build
WORKDIR /tmp
ENV GCSPROXY_VERSION=0.3.1
RUN apt-get update \
&& apt-get install --no-install-suggests --no-install-recommends --yes ca-certificates wget \
&& wget https://github.com/daichirata/gcsproxy/releases/download/v${GCSPROXY_VERSION}/gcsproxy-${GCSPROXY_VERSION}-linux-amd64.tar.gz \
&& tar zxf gcsproxy-${GCSPROXY_VERSION}-linux-amd64.tar.gz \
&& cp ./gcsproxy-${GCSPROXY_VERSION}-linux-amd64/gcsproxy .
FROM gcr.io/distroless/base
COPY --from=build /tmp/gcsproxy /gcsproxy
CMD ["/gcsproxy"]systemd example
[Unit]
Description=gcsproxy
[Service]
Type=simple
ExecStart=/opt/gcsproxy/gcsproxy -v
ExecStop=/bin/kill -SIGTERM $MAINPID
[Install]
WantedBy = multi-user.target
nginx.conf
upstream gcsproxy {
server '127.0.0.1:8080';
}
server {
listen 8081;
server_name _;
# Logs
access_log off;
error_log /var/log/nginx/gcsproxy.error.log error;
if ($request_method !~ "GET|HEAD|PURGE") {
return 405;
}
location / {
proxy_pass http://gcsproxy$uri;
}
}
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