Merge pull request #10 from eSailors/ssl

Add support for SSL

.gitignore

@@ -0,0 +1,2 @@
+/dev
+/*.retry

Dockerfile

@@ -13,8 +13,10 @@ COPY files/ecr.ini /etc/supervisor.d/ecr.ini
 COPY files/root /etc/crontabs/root
 
 COPY files/nginx.conf /usr/local/openresty/nginx/conf/nginx.conf
+COPY files/ssl.conf /usr/local/openresty/nginx/conf/ssl.conf
 
 ENV PORT 5000
+RUN chmod a+x /startup.sh /renew_token.sh
 
 ENTRYPOINT ["/startup.sh"]
 CMD ["/usr/bin/supervisord", "-c", "/etc/supervisord.conf"]

README.md

@@ -1,38 +1,64 @@
-aws-ecr-http-proxy
-===========
+<p align="left">
+    <a href="https://hub.docker.com/r/esailors/aws-ecr-http-proxy/builds" alt="Build">
+        <img src="https://img.shields.io/docker/build/esailors/aws-ecr-http-proxy" /></a>
+    <a href="https://hub.docker.com/r/esailors/aws-ecr-http-proxy" alt="Pulls">
+        <img src="https://img.shields.io/docker/pulls/esailors/aws-ecr-http-proxy" /></a>
+    <a href="https://www.esailors.de" alt="Maintained">
+        <img src="https://img.shields.io/maintenance/yes/2019.svg" /></a>
 
-A very simple nginx proxy that forwards requests to AWS ECR and caches the responses locally.
+</p>
 
-Run it like this, replace UPSTREAM with your target address with following required params:
-- `AWS_REGION`
-- `AWS_ACCESS_KEY_ID`
-- `AWS_SECRET_ACCESS_KEY`
+# aws-ecr-http-proxy
 
-It is also possible to define `CACHE_MAX_SIZE` env to limit maximum cache size on provided volume
+A very simple nginx push/pull proxy that forwards requests to AWS ECR and caches the responses locally.
 
-For example:
+### Configuration:
+The proxy is packaged in a docker container and can be configured with following environment variables:
+
+| Environment Variable                | Description                                    | Status                            | Default    |
+| :---------------------------------: | :--------------------------------------------: | :-------------------------------: | :--------: |
+| `AWS_REGION`                        | AWS Region for AWS ECR                         | Required                          |            |
+| `AWS_ACCESS_KEY_ID`                 | AWS Account Access Key ID                      | Required                          |            |
+| `AWS_SECRET_ACCESS_KEY`             | AWS Account Secret Access Key                  | Required                          |            |
+| `UPSTREAM`                          | URL for AWS ECR                                | Required                          |            |
+| `RESOLVER`                          | DNS server to be used by proxy                 | Required                          |            |
+| `PORT`                              | Port on which proxy listens                    | Required                          |            |
+| `CACHE_MAX_SIZE`                    | Maximum size for cache volume                  | Optional                          |  `75g`     |
+| `CACHE_KEY`                         | Cache key used for the content by nginx        | Optional                          |  `$uri`    |
+| `ENABLE_SSL`                        | Used to enable SSL/TLS for proxy               | Optional                          | `false`    |
+| `REGISTRY_HTTP_TLS_KEY`             | Path to TLS key in the container               | Required with TLS                 |            |
+| `REGISTRY_HTTP_TLS_CERTIFICATE`     | Path to TLS cert in the container              | Required with TLS                 |            |
+
+### Example:
 
 ```sh
 docker run --rm --name docker-registry-proxy --net=host \
-  -v /local-storage/cache:/cache \
+  -v /registry/local-storage/cache:/cache \
+  -v /registry/certificate.pem:/opt/ssl/certificate.pem
+  -v /registry/key.pem:/opt/ssl/key.pem
   -e PORT=5000 \
   -e RESOLVER=8.8.8.8 \
   -e UPSTREAM=https://XXXXXXXXXX.dkr.ecr.eu-central-1.amazonaws.com \
   -e AWS_SECRET_ACCESS_KEY=${AWS_SECRET_ACCESS_KEY} \
   -e AWS_ACCESS_KEY_ID=${AWS_ACCESS_KEY_ID} \
   -e AWS_REGION=${AWS_DEFAULT_REGION} \
   -e CACHE_MAX_SIZE=100g \
+  -e ENABLE_SSL=true \
+  -e REGISTRY_HTTP_TLS_KEY=/opt/ssl/key.pem \
+  -e REGISTRY_HTTP_TLS_CERTIFICATE=/opt/ssl/certificate.pem
   esailors/aws-ecr-http-proxy:latest
 ```
 
 If you ran this command on "registry-proxy.example.com" you can now get your images using `docker pull registry-proxy.example.com:5000/repo/image`.
 
 ### Deploying the proxy
-Modify the ansible role variables according to your need and run the playbook as follow:
+Modify the ansible role [variables](https://github.com/eSailors/aws-ecr-http-proxy/tree/master/roles/docker-registry-proxy/defaults) according to your need and run the playbook as follow:
 ```sh
 ansible-playbook -i hosts playbook-docker-registry-proxy.yaml
 ```
-The docker registry for project is available [here](https://hub.docker.com/r/esailors/aws-ecr-http-proxy)
+In case you want to enable SSL/TLS please replace the SSL certificates with the valid ones in [roles/docker-registry-proxy/files/*.pem](https://github.com/eSailors/aws-ecr-http-proxy/tree/master/roles/docker-registry-proxy/files)
 
-### Note
-The proxy has `HTTP` endpoint so in order to avoid docker client complaining about it either mark the registry host as insecure in your [deamon config](https://docs.docker.com/registry/insecure/) or add [SSL/TLS termination](https://docs.docker.com/registry/recipes/nginx)
+### Note on SSL/TLS
+The proxy is using `HTTP` (plain text) as default protocol for now. So in order to avoid docker client complaining either:
+ - (**Recommended**) Enable SSL/TLS using `ENABLE_SSL` configuration. For that you will have to mount your **valid** certificate/key in the container and pass the paths using  `REGISTRY_HTTP_TLS_*` variables.
+ - Mark the registry host as insecure in your client [deamon config](https://docs.docker.com/registry/insecure/).

files/nginx.conf

@@ -21,8 +21,15 @@ http {
   # will run before forking out nginx worker processes
   init_by_lua_block { require "cjson" }
 
+  #https://docs.docker.com/registry/recipes/nginx/#setting-things-up
+  map $upstream_http_docker_distribution_api_version $docker_distribution_api_version {
+  '' 'registry/2.0';
+  }
+
   server {
-    listen PORT default_server;
+    listen PORT SSL_LISTEN default_server;
+
+    SSL_INCLUDE
 
     # Cache
     add_header X-Cache-Status   $upstream_cache_status;
@@ -36,20 +43,21 @@ http {
     chunked_transfer_encoding on;
 
     # increases timeouts to avoid HTTP 504
-    proxy_connect_timeout  300s;
+    proxy_connect_timeout  3s;
     proxy_read_timeout     300s;
     proxy_send_timeout     300s;
     send_timeout           300s;
 
     # disable proxy request buffering
     proxy_request_buffering off;
 
+    add_header 'Docker-Distribution-Api-Version' $docker_distribution_api_version always;
     add_header "Access-Control-Allow-Origin" "*";
 
     location / {
       set $url        UPSTREAM;
       proxy_pass      $url;
-      proxy_redirect  $url http://$host:PORT;
+      proxy_redirect  $url SCHEME://$host:PORT;
 
       # Add AWS ECR authentication headers
       proxy_set_header  X-Real-IP          $remote_addr;
@@ -65,7 +73,7 @@ http {
     location ~ ^/v2/.*/blobs/[a-z0-9]+:[a-f0-9]+$ {
       set $url        UPSTREAM;
       proxy_pass      $url;
-      proxy_redirect  $url http://$host:PORT;
+      proxy_redirect  $url SCHEME://$host:PORT;
 
       # Add AWS ECR authentication headers
       proxy_set_header  X-Real-IP          $remote_addr;
@@ -88,7 +96,7 @@ http {
       set                    $saved_redirect_location '$upstream_http_location';
       proxy_pass             $saved_redirect_location;
       proxy_cache            cache;
-      proxy_cache_key        $scheme$proxy_host$uri$request_method;
+      proxy_cache_key        CACHE_KEY;
       proxy_cache_valid      200  1y;
       proxy_cache_use_stale  error timeout invalid_header updating
                              http_500 http_502 http_503 http_504;

files/ssl.conf

@@ -0,0 +1,8 @@
+ssl_certificate_key REGISTRY_HTTP_TLS_KEY;
+ssl_certificate     REGISTRY_HTTP_TLS_CERTIFICATE;
+
+ssl_protocols TLSv1.2;
+ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';
+ssl_prefer_server_ciphers on;
+
+add_header Strict-Transport-Security max-age=31536000;

files/startup.sh

@@ -34,13 +34,30 @@ echo Using resolver $RESOLVER and $UPSTREAM [$(dig +short  ${UPSTREAM_WITHOUT_PO
 CACHE_MAX_SIZE=${CACHE_MAX_SIZE:-75g}
 echo Using cache max size $CACHE_MAX_SIZE
 
+CACHE_KEY=${CACHE_KEY:='$uri'}
+echo Using cache key $CACHE_KEY
+
+SCHEME=http
 CONFIG=/usr/local/openresty/nginx/conf/nginx.conf
+SSL_CONFIG=/usr/local/openresty/nginx/conf/ssl.conf
+
+if [ "$ENABLE_SSL" ]; then
+  sed -i -e s!REGISTRY_HTTP_TLS_CERTIFICATE!"$REGISTRY_HTTP_TLS_CERTIFICATE"!g $SSL_CONFIG
+  sed -i -e s!REGISTRY_HTTP_TLS_KEY!"$REGISTRY_HTTP_TLS_KEY"!g $SSL_CONFIG
+  SSL_LISTEN="ssl"
+  SSL_INCLUDE="include $SSL_CONFIG;"
+  SCHEME="https"
+fi
 
 # Update nginx config
 sed -i -e s!UPSTREAM!"$UPSTREAM"!g $CONFIG
 sed -i -e s!PORT!"$PORT"!g $CONFIG
 sed -i -e s!RESOLVER!"$RESOLVER"!g $CONFIG
 sed -i -e s!CACHE_MAX_SIZE!"$CACHE_MAX_SIZE"!g $CONFIG
+sed -i -e s!CACHE_KEY!"$CACHE_KEY"!g $CONFIG
+sed -i -e s!SCHEME!"$SCHEME"!g $CONFIG
+sed -i -e s!SSL_INCLUDE!"$SSL_INCLUDE"!g $CONFIG
+sed -i -e s!SSL_LISTEN!"$SSL_LISTEN"!g $CONFIG
 
 # setup ~/.aws directory
 AWS_FOLDER='/root/.aws'

hosts

@@ -1,2 +1,2 @@
 [docker-registry-proxy]
-registry-proxy.example.com
+localhost ansible_connection=local

roles/docker-registry-proxy/defaults/main.yml

@@ -8,3 +8,7 @@ docker_proxy_backend_resolver: "8.8.8.8"
 docker_proxy_ecr_access_id:
 docker_proxy_ecr_secret_key:
 docker_proxy_ecr_region:
+
+docker_proxy_ssl_enabled:
+docker_proxy_ssl_host_path: /registry
+docker_proxy_ssl_container_path: /opt/nginx

roles/docker-registry-proxy/files/certificate.pem

@@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----
+MIIFcTCCA1mgAwIBAgIJALWdZASytQRkMA0GCSqGSIb3DQEBCwUAME8xCzAJBgNV
+BAYTAkRFMRUwEwYDVQQHDAxEZWZhdWx0IENpdHkxFTATBgNVBAoMDGVTYWlsb3Jz
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+XipqaCA=
+-----END CERTIFICATE-----

roles/docker-registry-proxy/files/key.pem

@@ -0,0 +1,52 @@
+-----BEGIN PRIVATE KEY-----
+MIIJQQIBADANBgkqhkiG9w0BAQEFAASCCSswggknAgEAAoICAQCrznLzCWlKJO4f
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+UFg2hiaXvnBuMgGHodqIzeQarqKv
+-----END PRIVATE KEY-----

roles/docker-registry-proxy/tasks/main.yaml

@@ -2,6 +2,16 @@
   become: true
   file: path={{ docker_proxy_cache_path  }} state=directory mode=0755 recurse=true
 
+- name: Copy the ssl certificates
+  become: true
+  copy:
+    src: "{{ item }}"
+    dest: "{{ docker_proxy_ssl_host_path }}/{{ item }}"
+  with_items:
+    - certificate.pem
+    - key.pem
+  when: docker_proxy_ssl_enabled | bool
+
 - name: Print current cache directory size information
   become: true
   command: du -hs {{ docker_proxy_cache_path  }}
@@ -10,6 +20,8 @@
   become: true
   command: >
     docker pull esailors/aws-ecr-http-proxy:{{ docker_proxy_version }}
+  tags:
+    - pull-image
 
 - name: Remove previous proxy container
   become: true
@@ -29,11 +41,21 @@
       --net host
       --restart=unless-stopped
 
-      -v {{ docker_proxy_cache_path  }}:/cache
+      -v {{ docker_proxy_cache_path }}:/cache
+
+      {% if docker_proxy_ssl_enabled | bool %}
+      -v {{ docker_proxy_ssl_host_path }}/certificate.pem:{{ docker_proxy_ssl_container_path }}/certificate.pem
+      -v {{ docker_proxy_ssl_host_path }}/key.pem:{{ docker_proxy_ssl_container_path }}/key.pem
+
+      -e ENABLE_SSL=true
+      -e REGISTRY_HTTP_TLS_KEY={{ docker_proxy_ssl_container_path }}/key.pem
+      -e REGISTRY_HTTP_TLS_CERTIFICATE={{ docker_proxy_ssl_container_path }}/certificate.pem
+      {% endif %}
+
       -e RESOLVER={{ docker_proxy_backend_resolver }}
       -e PORT=5000
       -e UPSTREAM={{ docker_proxy_backend_schema }}://{{ docker_proxy_backend }}
-      -e CACHE_MAX_SIZE={{ docker_proxy_cache_limit }} 
+      -e CACHE_MAX_SIZE={{ docker_proxy_cache_limit }}
       -e AWS_ACCESS_KEY_ID={{ docker_proxy_ecr_access_id }}
       -e AWS_SECRET_ACCESS_KEY={{ docker_proxy_ecr_secret_key }}
       -e AWS_REGION={{ docker_proxy_ecr_region }}