Docker Flow proxy for hosting multiple micro services under one http …

…endpoint (#32)

* Base for gateway or docker flow proxy.

* Change default overlay subnet to not conflict with default aws subnet

embedded-execution-layer/flow-proxy.yml

@@ -0,0 +1,12 @@
+---
+
+- hosts: initial-swarm-leader-manager
+  become: yes
+  roles:
+    - { role: flow_proxy,
+        docker_endpoint: "127.0.0.1:2376",
+        docker_client_cert: "/opt/ssl/client.crt",
+        docker_client_cacert: "/opt/ssl/ca.crt",
+        docker_client_key: "/opt/ssl/client.pem"
+      }
+

embedded-execution-layer/platform/cassandra/defaults/main.yml

@@ -1,4 +1,4 @@
 ---
 cassandra_node_constraint: "node.labels.cassandra==true"
 cassandra_version: 3.9
-cassandra_overlay_subnet: 10.0.1.0/24
+cassandra_overlay_subnet: 10.0.2.0/24

embedded-execution-layer/platform/flow_proxy/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+flow_proxy_overlay_subnet: 10.0.2.0/24

embedded-execution-layer/platform/flow_proxy/tasks/main.yml

@@ -0,0 +1,86 @@
+---
+
+# We use the external docker API made available to us to provision this
+- name: Check parameters
+  assert:
+    that:
+      - docker_client_cert is defined
+      - docker_client_key is defined
+      - docker_client_cacert is defined
+      - docker_endpoint is defined
+
+- set_fact:
+    docker_cmd: docker --tlsverify --tlscacert={{ docker_client_cacert }} --tlscert={{ docker_client_cert }} --tlskey={{ docker_client_key }} -H {{ docker_endpoint }}
+
+- name: Check for Proxy Network
+  command: |
+    {{ docker_cmd }}
+    network inspect proxy
+  register: tmp_command_result
+  failed_when: "'Usage' in tmp_command_result.stderr"
+
+- set_fact:
+    tmp_network_exists: "{{ tmp_command_result.stderr == ''}}"
+
+
+- name: Deploy Proxy Network
+  command: |
+    {{ docker_cmd }}
+    network create --driver overlay --opt encrypted --subnet {{ flow_proxy_overlay_subnet }} proxy
+  when: not tmp_network_exists
+
+
+- name: Check for Swarm Listener Service
+  command: |
+    {{ docker_cmd }}
+    service inspect swarm-listener
+  register: tmp_command_result
+  failed_when: "'Usage' in tmp_command_result.stderr"
+
+- set_fact:
+    tmp_service_exists: "{{ tmp_command_result.stderr == ''}}"
+
+- name: Deploy Swarm Listener Service
+  command: |
+    {{ docker_cmd }}
+    service create --name swarm-listener
+    --network proxy
+    --mount "type=bind,source=/var/run/docker.sock,target=/var/run/docker.sock"
+    -e DF_NOTIFY_CREATE_SERVICE_URL=http://proxy:8080/v1/docker-flow-proxy/reconfigure
+    -e DF_NOTIFY_REMOVE_SERVICE_URL=http://proxy:8080/v1/docker-flow-proxy/remove
+    --constraint 'node.role==manager'
+    vfarcic/docker-flow-swarm-listener
+  when: not tmp_service_exists
+
+- name: Check for Flow Proxy Service
+  command: |
+    {{ docker_cmd }}
+    service inspect proxy
+  register: tmp_command_result
+  failed_when: "'Usage' in tmp_command_result.stderr"
+
+- set_fact:
+    tmp_service_exists: "{{ tmp_command_result.stderr == ''}}"
+
+- name: Deploy Flow Proxy Service
+  command: |
+    {{ docker_cmd }}
+    service create --name proxy
+    --mode global
+    -p 80:80
+    -p 443:443
+    --network proxy
+    -e MODE=swarm
+    -e LISTENER_ADDRESS=swarm-listener
+    vfarcic/docker-flow-proxy
+  when: not tmp_service_exists
+
+
+
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