Starting the Discovery Script

.gitignore

@@ -1,3 +1,4 @@
 .idea
 *~
-venv
+venv
+.docker_data

Dockerfile

@@ -5,6 +5,8 @@ RUN apk add --no-cache bash python3 py-yaml
 COPY entrypoint.* /
 COPY conf.d /etc/haproxy/conf.d
 COPY assets/errors-custom/* /etc/haproxy/errors-custom/
+RUN pip install --upgrade pip \
+ && pip install -r requirements.txt
 
 ENTRYPOINT [ "/entrypoint.sh" ]
 CMD ["haproxy", "-f", "/etc/haproxy/haproxy.cfg"]

README.md

@@ -5,53 +5,57 @@ This Docker image will create dynamically the `haproxy.cfg` based on very simple
 # Features
 
 - Enable or disable Stats on port 1936 with custom password
-- Simple mapping host => host:port 
-- Simple redirect host => host:port
+- Discover and setup haproxy from Docker Tag 
+- Discover and setup haproxy redirect from Docker Tag
 
 
 # Basic Usage
 
-Create a yaml file in your machine called `easyconfig.cfg` and put the contents:
-
-```yaml
-stats:
-  username: admin
-  password: password
-  port: 1936         # Optional (default 1936)
-
-customerrors: true   # Optional (default false)
-
-easymapping:
-  - port: 80
-    hosts:                                     
-      host1.com.br: container:5000
-      host2.com.br: other:3000
-    redirect:
-      www.host1.com.br: http://host1.com.br
-      
-  - port: 443
-    ssl_cert: /etc/easyconfig/mycert.pem
-    hosts:
-      host1.com.br: container:80
-
-  - port: 8080
-    hosts:
-      host3.com.br: domain:8181
-```
-
-Then run (remember to enable the proper ports):
+Docker run:
 
 ```bash
 docker run \ 
-    -v /path/to/local:/etc/easyconfig \
     -p 80:80 \
     -p 8080:8080 \
     -p 1936:1936 \
     --name easy-haproxy-instance \
+    -e DISCOVER=swarm \
+    -e HAPROXY_USERNAME=admin \
+    -e HAPROXY_PASSWORD=password \
+    -e HAPROXY_STATS_PORT=1936 \ 
+    -e REFRESH_STATE=1 \
     -d byjg/easy-haproxy
 ```
 
+The `DISCOVER` environment variable will define where is located your containers (see below more details):
+- swarm
+- awsecs
 
+# Tags to defined:
+
+| Tag                                        | Description                                                                                             |
+|--------------------------------------------|---------------------------------------------------------------------------------------------------------|
+| com.byjg.easyhaproxy.definitions           | A Comma delimited list with the definitions. Each name requires the definition of the parameters below. |
+| com.byjg.easyhaproxy.port.<definition>     | What is the port that the HAProxy will listen to.                                                       |
+| com.byjg.easyhaproxy.host.<definition>     | What is the host that the HAProxy will listen to.                                                       |
+| com.byjg.easyhaproxy.redirect.<definition> | Host redirects from connections in the port defined above.                                              |
+| com.byjg.easyhaproxy.sslcert.<definition>  | Cert PEM Base64 encoded.                                                                                |
+
+E.g.
+
+```
+docker run \
+    -l com.byjg.easyhaproxy.definitions=http \
+    -l com.byjg.easyhaproxy.port.http=80\
+    -l com.byjg.easyhaproxy.host.http=byjg.com.br \
+    ....
+```
+
+## Redirect Example:
+
+```text
+www.byjg.com.br=>http://byjg.com.br,byjg.com=>http://byjg.com.br
+```
 
 # Mapping custom .cfg files
 
@@ -114,3 +118,18 @@ is the http error code (e.g. 503.http)
 docker build -t byjg/easy-haproxy .
 ```
 
+
+
+# Docker Swarm
+
+
+# AWS
+
+Easy HAProxy will try to get tasks from the tasks running in the CLUSTER. 
+It is important that easy haproxy run in the ECS Cluster and can connect to the containers.  
+
+   
+You'll have to pass also the `AWS_ACCESS_KEY_ID`/`AWS_SECRET_ACCESS_KEY` or setup a role in the instance in order and 
+the `ECS_CLUSTER` with the arn of the cluster
+
+

discover.py

@@ -0,0 +1,39 @@
+import os
+import json
+
+path = os.path.dirname(os.path.realpath(__file__))
+with open(path + "/.docker_data", 'r') as content_file:
+    lineList = content_file.readlines()
+
+result = dict()
+
+for line in lineList:
+    line = line.strip()
+    i = line.find("=")
+    container = line[:i]
+    jsonStr = line[i+1:]
+    d = json.loads(jsonStr)
+
+    if "com.byjg.easyhaproxy.definitions" in d.keys():
+        definitions = d["com.byjg.easyhaproxy.definitions"].split(",")
+
+        for definition in definitions:
+            port = d["com.byjg.easyhaproxy.port." + definition] if "com.byjg.easyhaproxy.port." + definition in d else "80"
+            if port not in result:
+                result[port] = dict()
+                result[port]["hosts"] = dict()
+                result[port]["redirect"] = dict()
+                result[port]["ssl_cert"] = None
+
+            result[port]["hosts"][d["com.byjg.easyhaproxy.host." + definition] if "com.byjg.easyhaproxy.host." + definition in d else ""] = container + ":" + (d["com.byjg.easyhaproxy.localport." + definition] if "com.byjg.easyhaproxy.localport." + definition in d else "80")
+
+            redirect = d["com.byjg.easyhaproxy.redirect." + definition] if "com.byjg.easyhaproxy.redirect." + definition in d else ""
+            for r in redirect.split(","):
+                r_parts = r.split("=>")
+                result[port]["redirect"][r_parts[0]] = r_parts[1]
+
+
+print(result)
+# print(jsonStr)
+
+

discover.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+
+#docker run \
+#    -l com.byjg.easyhaproxy.definitions=http \
+#    -l com.byjg.easyhaproxy.port.http=80 \
+#    -l com.byjg.easyhaproxy.port.localport=80 \
+#    -l com.byjg.easyhaproxy.host.http=byjg.com.br \
+#    -l com.byjg.easyhaproxy.redirect.http=byjg.com.br%http://www.byjg.com.br,byjg.com%http://www.byjg.com.br \
+#-d byjg/php:7.3-fpm-nginx
+
+
+touch ./.docker_data ./docker_data_old
+
+mv ./.docker_data ./docker_data_old
+
+CONTAINERS=$(docker node ps $(docker node ls -q) --format "{{ .Name }}" --filter desired-state=running | cut -d. -f1 | sort | uniq)
+
+for container in $CONTAINERS; do
+    docker inspect --format "{{ json .Spec.Labels }}" $container | xargs -I % echo $container=% >> ./.docker_data
+done
+
+
+if cmp -s ./.docker_data ./.docker_data_old ; then
+   echo "Nothing changed"
+else
+   echo "Something changed"
+fi
+
+# byjg_site={"com.byjg.easyhaproxy.definition":"http","com.byjg.easyhaproxy.host.http":"byjg.com.br","com.byjg.easyhaproxy.port.http":"80","com.byjg.easyhaproxy.redirect.http":"byjg.com.br%http://www.byjg.com.br,byjg.com%http://www.byjg.com.br","maintainer":"Joao Gilberto Magalhaes"}

requirements.txt

@@ -1 +1,2 @@
-pyyaml
+pyyaml
+docker