Add APPC Deployment Documentation

This will take care of adding the following RST documentation files:
- The README in the appc git repo so that it is also available in HTML form
- The documentation found on wiki to build and test APPC in a local environment.

Change-Id: Iea7153bd077b60c7ae40da423e1a154de97ce390
Signed-off-by: Hector Anapan <ha076r@att.com>
Issue-Id: APPC-247

1 files changed, 338 insertions, 0 deletions

diff --git a/docs/APPC Deployment Guidelines/APPC Deployment Guidelines.rst b/docs/APPC Deployment Guidelines/APPC Deployment Guidelines.rst
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+==========================
+APPC Deployment Guidelines
+==========================
+
+Introduction
+============
+
+The Application Controller (APPC) is one of the components in the ONAP
+Platform. Its main function is to perform functions to control the
+lifecycle of Virtual Functions (VNFs) as well as the components that
+make up these functions. Therefore, this allows the cloud to be
+abstracted from Virtual Functions in order to enable repeatable actions,
+as well as enabling automation and a dynamic configuration approach.
+
+ONAP APPC is delivered with **3 Docker Containers**, which are deployed
+using Docker Images already containing the APPC Framework Suite. NOTE:
+All three containers are hosted on Ubuntu 14.04 LTS OS.
+
+Deployment Mode for APPC
+========================
+
+The docker containers described above are set up to be deployed on the
+same Virtual Machine. **Docker Compose** is Docker's deployment tool
+that allows to configure and deploy multiple containers at once.
+
+Compiling and Building APPC
+===========================
+
+APPC (structured as a Maven project) uses the Maven tool to help
+compile, build, and deploy APPC Artifacts (usually made up of Java
+packages) into a Maven Repository. In order to compile and build APPC, a
+``mvn clean install`` is executed, which checks for any errors and Java
+exceptions during compilation process.
+
+Deploying APPC
+==============
+
+In order to deploy APPC, a Docker-ready machine needs to be available in
+order to deploy the APPC Docker Containers. The following will help
+explain the requirements in order to run Docker to deploy these
+containers.
+
+APPC Docker Containers
+----------------------
+
+ONAP APPC docker images are currently stored on the Rackspace Nexus
+Docker Registry (Maven Repository). The deployment code can be found in
+the Maven Project that builds and deploys the Docker Images to be
+deployed in the Nexus Repository (current approach is by using Jenkins).
+These Docker Images are composed of the APPC Artifacts
+(org.openecomp.appc.\*) compiled and packaged in the "appc" git
+repository.
+
+The following Docker images are the actual deployment images used for
+running APPC:
+
+-  **APPC Container**: This Docker container carries the APPC Core
+   Framework (OpenDaylight, Karaf, OSGI Bundles, ODL Functions/APIs, and
+   APPC specific features). This image is built on top of the SDN-C
+   Docker Image, which contains core features (such as dblib as the
+   Database Connector, SLI - the Service Logic Interpreter, and the
+   Active & Available Inventory (A&AI) Listener). Some of these
+   inherited SDN-C features/artifacts are necessary dependencies to
+   build and compile APPC features/artifacts.
+-  **MySQL DB Container (Version 5.6)**: This is the database for APPC.
+   It is currently using MySQL Community Version (Open-Source version).
+-  **Node Red / DGBuilder**: This container has the visual tool used to
+   assemble DGs in order to put together flows or services used to serve
+   Virtual Functions. NOTE: This container is deployed using a Docker
+   Image that is managed and supported by the SDN-C component.
+
+Starting APPC
+=============
+
+Ther following steps are needed to deploy and start ONAP APPC:
+
+Requirement to Pre-Define properties before compiling APPC:
+-----------------------------------------------------------
+
+-  The following maven properties are not defined by default, since they
+   change based on where the platform is being deployed:
+
+   -  ${openecomp.nexus.url}: URL of the Nexus Repository where APPC
+      Code is at.
+   -  ${openecomp.nexus.port}: Port number of the Nexus Repository where
+      APPC Code is at.
+   -  ${openecomp.nexus.user}: Username ID of the Nexus Repository where
+      APPC Code is at.
+   -  ${openecomp.nexus.password}: Password of the Nexus Repository
+      where APPC Code is at.
+
+Using Jenkins Jobs to set up APPC Package
+-----------------------------------------
+
+-  A Jenkins instance for ONAP is required, in which Jenkins Jobs for
+   both the APPC core code and deployment code are maintained.
+
+-  Jenkins Job for APPC Core git project: The Jenkins Job for the APPC
+   git repository (Core Component) is in charge of compiling and
+   uploading/deploying successfully compiled maven APPC artifacts into a
+   Nexus/Maven Repository.
+
+-  Jenkins Job for APPC Deployment git project: The Jenkins Job is used
+   to run the APPC Deployment code which ultimately builds and deploy
+   the APPC Docker Image. Once the Jenkins job runs successfully, the
+   newly compiled images are uploaded to the Nexus Repository. The APPC
+   Docker image contains all the SDN-C and APPC artifacts needed to
+   deploy a successful APPC Component.
+
+   -  With this job, all required and newly compiled and uploaded (to
+      Nexus Repository) APPC features from the Jenkins job are pulled
+      into the images and installed in an automated fashion.
+
+-  As explained in the "APPC Docker Containers" section, the
+   configuration and set up of the other two docker containers are not
+   maintained by APPC. MySQL Docker Image is maintained by the Open
+   Source MySQL Community and the Node Red / DGBuilder Docker Image is
+   maintained by SDN-C.
+
+Using Docker to start APPC Package
+----------------------------------
+
+-  The VM where APPC will be started needs to have Docker Engine and
+   Docker-Compose installed (instructions on how to set Docker Engine
+   can be found
+   `here <https://docs.docker.com/engine/installation/>`__). The stable
+   version of Docker Engine where APPC has been tested to work is v1.12.
+   An important requirement in order to access the Docker Image
+   Repository on Nexus Repository (where docker images are currently
+   stored) need to include the Nexus repository certificate imported in
+   the host VM. This is needed for Docker to be able to access the
+   Docker Images required (NOTE: MySQL Docker Image is obtained from the
+   public Docker Hub).
+
+-  NOTE ON "docker-compose" COMMANDS: The only work if there is a
+   provided docker-compose YAML script in the cmd path
+
+-  In order to deploy containers, the following steps need to be taken
+   in your host VM (Assuming instructions on how to set up Docker Engine
+   have already been done):
+
+.. code:: bash
+
+    # Install Docker-Compose
+    apt-get install python-pip
+    pip install docker-compose
+
+    # Login to Nexus Repo to pull Docker Images (this assumes that Nexus Certificate is already imported in the Host VM on /usr/local/share/ca-certificates/ path):
+    docker login <DOCKER_REGISTRY_REPO> # prompts for user credentials as a way to authenticate
+
+    # Pull latest version of Docker Images (separately)
+    docker pull <APPC_DOCKER_IMAGE_URL>
+    docker pull mysql/mysql-server:5.6 # Default Open-Source MySQL Docker Image
+    docker pull <SDNC_DOCKER_IMAGE_URL>
+
+    # Pull latest version of Docker Images
+    docker-compose pull
+
+    # Deploy Containers
+    docker-compose up  # add -d argument to start process as a daemon (background process)
+
+Using Docker to stop APPC Package
+---------------------------------
+
+-  The following steps are required to stop the APPC package:
+
+.. code:: bash
+
+    # Stop and Destroy Docker Containers (with docker-compose YAML script)
+    docker-compose down
+
+    # Stop Docker Containers (without docker-compose YAML script)
+    docker stop <APPC_DOCKER_CONTAINER>
+    docker stop <MYSQL_DOCKER_CONTAINER>
+    docker stop <DGBUILDER_DOCKER_CONTAINER>
+
+    # Destroy Docker Containers (without docker-compose YAML script)
+    docker rm <APPC_DOCKER_CONTAINER>
+    docker rm <MYSQL_DOCKER_CONTAINER>
+    docker rm <DGBUILDER_DOCKER_CONTAINER>
+
+-  NOTE: To get a feel of how the deployment is actually performed, it
+   is best to review the Docker Strategy of APPC and look at the actual
+   Jenkins Jobs.
+
+Other Useful Docker Commands
+----------------------------
+
+-  The commands below are useful to test or troubleshoot in case a
+   change in the gitlab code breaks a clean APPC deployment:
+
+.. code:: bash
+
+    # Check current docker-compose logs generated during 'docker-compose up' process:
+    docker-compose logs # add -f to display logs in real time
+
+    # Check out docker container's current details
+    docker inspect <DOCKER_CONTAINER>
+
+    # Verbose output during docker-compose commands
+    docker-compose --verbose <DOCKER_COMPOSE_CMD_ARG>
+
+    # Check previous docker volumes
+    docker volume ls
+
+    # Delete previous docker volume(s)
+    docker volume rm <DOCKER_VOL_ID_1> <DOCKER_VOL_ID_2> ... <DOCKER_VOL_ID_N>
+
+ONAP Heat Template
+------------------
+
+A Heat template that can be used on RackSpace to spin up the APPC Host
+VM as well as the other ONAP Components is available in gitlab. This
+template would orchestrate the deployment of all ONAP components, which
+will trigger docker instantiation techniques to start up the containers
+(either standard docker or docker-compose - depending on how the
+component's containers get spun up).
+
+Validating APPC Installation
+============================
+
+First of all, APPC Features come in the form of Karaf Features (an
+ODL-OpenDaylight package) which can be composed of one or more OSGI
+bundles. These features get installed in the ODL framework in order to
+be used and installed in the APPC Docker Container (NOTE: SDN-C Core
+Features also get installed since APPC docker image uses the SDN-C Core
+docker image as a base image).
+
+Accessing docker containers
+---------------------------
+
+The following command is used to log in / access the docker containers:
+
+.. code:: bash
+
+    docker exec -it <DOCKER_CONTAINER> bash
+
+Checking if APPC Features are installed successfully
+----------------------------------------------------
+
+The following commands are used to check if the APPC (and SDN-C) Bundles
+and Features have been installed correctly in ODL (make sure to enter
+the APPC Docker Container shell session):
+
+.. code:: bash
+
+    # All commands are done inside the appc docker container
+
+    # Enter the ODL Karaf Console
+    cd /opt/opendaylight/current/bin
+    ./client -u karaf
+
+    # Check if features have been installed or not (the ones with an 'X' in the "Installed" column have been successfully installed)
+    feature:list | grep appc # filter appc features only
+    feature:list | grep sdnc # filter sdn-c features only
+
+    # Check if bundles have been loaded successfully (the ones with 'Active' in the "State" column have been successfully loaded)
+    bundle:list | grep appc # filter appc bundles only
+    bundle:list | grep sdnc # grep sdn-c bundles only
+
+    # Check reason why bundle failed to load
+    bundle:diag | grep <BUNDLE_NAME>
+
+Accessing the API Explorer
+--------------------------
+
+The API Explorer is a GUI provided by OpenDaylight Open Source
+Framework. This GUI is very useful to send API calls from APIs that are
+either developed by APPC or SDN-C frameworks. In order to make these
+REST calls, some APIs use the
+`RESTCONF <http://sdntutorials.com/what-is-restconf/>`__ protocol to
+make such calls.
+
+Currently, the APIs that have a Directed Graph (DG) mapped to it are the
+ones that can be tested which are the SDN-C APIs and APPC
+"appc-provider" APIs (LCM APIs will be available to test in later
+releases).
+
+In order to access this GUI, you need to go to the following website
+which will prompt for ODL user credentials in order to authenticate
+(more details on generic API Explorer
+`here <https://wiki.opendaylight.org/view/OpenDaylight_Controller:MD-SAL:Restconf_API_Explorer>`__):
+
+-  http://localhost:8282/apidoc/explorer/index.html (change localhost to
+   your VM's public IP).
+
+APPC Configuration Model
+========================
+
+APPC Configuration model involves using "default.properties" files
+(which are usually located in each of the APPC Features -
+..//src//resources/org/openecomp/appc/default.properties) for APPC
+Feature that have default (or null) property values inside the core APPC
+code. These default (or null) properties should be overwritten in the
+properties file called "appc.properties" located in the APPC Deployment
+code (../installation/src/main/appc-properties/appc.properties).
+
+Each APPC component depends on the property values that are defined for
+them in order to function properly. For example, the APPC Feature
+"appc-rest-adapter" located in the APPC Core repo is used to listen to
+events that are being sent and received in the form of DMaaP Messages
+through a DMaaP Server Instance (which is usually defined as a RESTful
+API Layer over the Apache Kafka Framework). The properties for this
+feature need to be defined to point to the right DMaaP set of events to
+make sure that we are sending and receiving the proper messages on
+DMaaP.
+
+Currently, there are two ways to change properties for APPC Features:
+
+-  **Permanent Change**: In appc.properties, change property values as
+   needed and commit changes in your current git repo where your APPC
+   Deployment code repo is at. Then, run your Jenkins job that deploys
+   the APPC Docker Image (make sure the Jenkins Job configuration points
+   to the branch where you just commited the properties change) to make
+   sure that APPC Docker Image contains latest changes of
+   appc.properties from the beginning (of course, the Host VM where the
+   docker containers will be deployed at needs to update images with
+   "docker-compose pull" to pick up the changes you just committed and
+   compiled).
+-  **Temporary Change (for quick testing/debugging)**: In the APPC
+   Docker Container, find the appc.properties file in
+   /opt/openecomp/appc/properties/appc.properties and make changes as
+   needed. Then, restart the APPC Docker Container by running "docker
+   stop " then "docker start ") (NOTE: This approach will lose all
+   changes done in appc.properties if the docker container is destroyed
+   instead of stopped).
+
+Additional Notes
+================
+
+-  For more information on a current list of available properties for
+   APPC Features, please go to README.md located in the installation
+   directory path of the APPC Deployment Code.
+-  More documentation can be found on the ONAP Wiki's `APPC
+   Documentation Page <https://wiki.onap.org/display/DW/Controllers>`__
+   and in ONAP's `Read the
+   docs <http://onap.readthedocs.io/en/latest/release/index.html#projects>`__
+   documentation site.