Migrating from consul to mongodb for backend

Migrating to mongodb from consul.
The main reason being the value size limitation of 512kb in consul.
See https://jira.onap.org/browse/MULTICLOUD-426 for details.
This requires a little bit of hierarchy management
and data management.
We are no longer converting structs to json encoded
strings. The underlying db supports structs without any modifications.
Also, since Mongo has the concept of collections, each submodule can
use its own collection for storage as needed.
Definition uses a collection called rbdef right now.
P10: Enabling unit tests for mongo.go. This requires the usage
     of aliased functions.
P11: Expanded unit tests for all functions in mongo.go
P12: Refactored parameter validation.
     Removed TestHealthCheck as we are not mocking any of the
       db commands right now
     Checking return value of read with an expected value
P13: Adding back consul support.
     Fixing functional test
     Full consul implementation check and modifications is
     being tracked by MULTICLOUD-427
P15: Fix ReadAll unit test and corresponding code
     ReadAll now returns error when no objects are found

Issue-ID: MULTICLOUD-426
Change-Id: I42d239b324025fc4ef4e561790aceeff794001ef
Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

2 files changed, 9 insertions, 14 deletions

diff --git a/deployments/docker-compose.yml b/deployments/docker-compose.yml
index 73d5651c..a72bd096 100644
--- a/deployments/docker-compose.yml
+++ b/deployments/docker-compose.yml
@@ -28,33 +28,28 @@ services:
     environment:
       - CSAR_DIR=/opt/csar
       - KUBE_CONFIG_DIR=/opt/kubeconfig
-      - DATABASE_TYPE=consul
+      - DATABASE_TYPE=mongo
       - DATABASE_IP=172.19.0.2
       - PLUGINS_DIR=/opt/multicloud/k8s
       - HTTP_PROXY=$HTTP_PROXY
       - HTTPS_PROXY=$HTTPS_PROXY
       - NO_PROXY=$NO_PROXY,172.19.0.2
     depends_on:
-      - consul
+      - mongo
     links:
-      - consul
+      - mongo
     volumes:
       - /opt/csar:/opt/csar
       - /opt/kubeconfig:/opt/kubeconfig
-  consul:
-    image: consul
+  mongo:
+    image: mongo
     networks:
       multicloud_net:
         ipv4_address: 172.19.0.2
     environment:
-      CONSUL_CLIENT_INTERFACE: 'eth0'
-      CONSUL_BIND_INTERFACE: 'eth0'
       HTTP_PROXY: $HTTP_PROXY
       HTTPS_PROXY: $HTTPS_PROXY
       NO_PROXY: $NO_PROXY
-    command: ["agent", "-server", "-bootstrap-expect=1"]
-    volumes:
-      - /opt/consul/config:/consul/config
 
 networks:
   multicloud_net:
diff --git a/deployments/start.sh b/deployments/start.sh
index da2eacee..d1b9f68a 100755
--- a/deployments/start.sh
+++ b/deployments/start.sh
@@ -19,13 +19,13 @@ export IMAGE_NAME="nexus3.onap.org:10003/onap/multicloud/k8s"
 
 export CSAR_DIR=/opt/csar
 export KUBE_CONFIG_DIR=/opt/kubeconfig
-export DATABASE_TYPE=consul
+export DATABASE_TYPE=mongo
 export PLUGINS_DIR=$k8s_path/src/k8splugin/plugins
 
-echo "Starting consul services"
+echo "Starting mongo services"
 docker-compose kill
-docker-compose up -d consul
-export DATABASE_IP=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker ps -aqf "name=consul"))
+docker-compose up -d mongo
+export DATABASE_IP=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker ps -aqf "name=mongo"))
 export no_proxy=$no_proxy,$DATABASE_IP
 export NO_PROXY=$NO_PROXY,$DATABASE_IP