Created config guide for SDC sample app

- Overview with micro-service diagram
- Source diagram file in GIMP with layers for editing by
others
- Deploying the sample
- Using the sample
- Exposing Jaeger Tracing and Prometheus monitoring browser
interfaces
- Modifying run-time micro-service configuration including
modifying load balancer server list and adding a custom snort rule
- Uninstalling the sample

- Updated overview with service description, table and traffic
flow description, general edits
- Link to A/B configuration guide and doc index file
- Additional edits
- Diagram for Jaeger UI with SDC

Change-Id: I5d851316c05a9e1bd48c8aab5511a98116e6893d
Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>
(cherry picked from commit cf6910ca918b00ef5859bb060ac81cc148e6c0d1)

6 files changed, 546 insertions, 0 deletions

diff --git a/docs/release/configguide/a_b_config_guide.rst b/docs/release/configguide/a_b_config_guide.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. SPDX-License-Identifier CC-BY-4.0
+.. (c) optionally add copywriters name
+
+.. _a_b_config_guide:
+
+=======================
+A-B Configuration Guide
+=======================
+
+This is a placeholder file for now
+
+- ensure Istio is in the path
+- ensure old route rule deleted
+- istioctl -n default delete routerules lb-default
+- redis port forward
+- clover/test/yaml/fraser_a_b_test.yaml
+- change ingress port
diff --git a/docs/release/configguide/imgs/sdc_sample.png b/docs/release/configguide/imgs/sdc_sample.png
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diff --git a/docs/release/configguide/imgs/sdc_tracing.png b/docs/release/configguide/imgs/sdc_tracing.png
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diff --git a/docs/release/configguide/index.rst b/docs/release/configguide/index.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. SPDX-License-Identifier CC-BY-4.0
+.. (c) optionally add copywriters name
+
+.. _clover_config_guides:
+
+********************************************************
+OPNFV Verified Program Testing User Guide
+********************************************************
+
+.. toctree::
+   :maxdepth: 3
+
+   sdc_config_guide.rst
+   a_b_config_guide.rst
diff --git a/docs/release/configguide/sdc_config_guide.rst b/docs/release/configguide/sdc_config_guide.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. SPDX-License-Identifier CC-BY-4.0
+.. (c) optionally add copywriters name
+
+
+=======================================
+Clover SDC Sample Configuration Guide
+=======================================
+
+This document provides a guide to use the Service Delivery Controller (SDC) sample, which is
+initially delivered in the Clover Fraser release.
+
+.. contents::
+   :depth: 3
+   :local:
+
+
+Overview
+=========
+
+The SDC is a sample application that allows the flow of ingress HTTP traffic to be controlled
+and inspected in an Istio service mesh. It provides the ability to demonstrate the Istio sandbox
+including a service mesh and surrounding tools including tracing, monitoring, and logging.
+
+The SDC sample comprises the following services:
+
+ * **Proxy** - used to mirror traffic to security (snort-ids) services and propagate traffic to
+   load balancing services. In future releases, the proxy will process security alerts and
+   provide access control by blacklisting clients based on source IP address.
+
+ * **Load Balancer** - provides basic round-robin load balancing to other downstream
+   services without Istio provisions. Istio features built-in load balancing to provide
+   request routing for canary and A/B scenarios. The sample application employs both tiers
+   of load balancing to demonstrate how load balancing algorithms can be controlled to
+   address both network and application requirements.
+
+ * **Intrusion Detection System** - used to detect web vulnerabilities using limited set of
+   rules/signatures and send security alerts to the proxy.
+
+ * **Server** - simple web servers used to terminate web requests from the load balancing
+   services for end-to-end traffic flow.
+
+The table below shows key details of the sample application Kubernetes manifest for the services
+outlined above:
+
++---------------------+----------------------+------------------------+-----------------------+
+| Service             |     Kubernetes       | Docker Image           | Ports                 |
+|                     | Deployment App Name  |                        |                       |
++=====================+======================+========================+=======================+
+| Proxy               | proxy-access-control | clover-ns-nginx-proxy  | HTTP: 9180            |
+|                     |                      |                        | GRPC: 50054           |
++---------------------+----------------------+------------------------+-----------------------+
+| Load Balancers      | app: http-lb         | clover-ns-nginx-lb     | HTTP: 9180            |
+|                     | version: http-lb-v1  |                        | GRPC: 50054           |
+|                     | version: http-lb-v2  |                        |                       |
++---------------------+----------------------+------------------------+-----------------------+
+| Intrusion Detection | snort-ids            | clover-ns-snort-ids    | HTTP: 80, Redis: 6379 |
+| System (IDS)        |                      |                        | GRPC: 50052 (config)  |
+|                     |                      |                        | GRPC: 50054 (alerts)  |
++---------------------+----------------------+------------------------+-----------------------+
+| Servers             | clover-server1       | clover-ns-nginx-server | HTTP: 9180            |
+|                     | clover-server2       |                        | GRPC: 50054           |
+|                     | clover-server3       |                        |                       |
+|                     | clover-server4       |                        |                       |
+|                     | clover-server5       |                        |                       |
++---------------------+----------------------+------------------------+-----------------------+
+
+Additionally, the sample uses other ancillary elements including:
+
+ * A Redis in-memory data store for the snort IDS service to write alerts. It can also be used
+   by the Clover tracing module to analyze traces over time. Standard community containers of
+   Redis are employed by Clover.
+
+ * A Kubernetes Ingress resource (proxy-gateway) to manage external access to the service mesh.
+
+ * Clover docker container that is used to invoke deployment and cleanup scripts for the sample.
+   It can also be used to execute scripts that modify run-time service configurations. Using the
+   container avoids the need to clone the source code.
+
+ * Optional deployment of Jaeger tracing and Prometheus monitoring tools with access to their
+   browser-based UIs.
+
+.. image:: imgs/sdc_sample.png
+    :align: center
+    :scale: 100%
+
+The diagram above shows the flow of web traffic where all blue arrows denote the path of incoming
+HTTP requests through the service mesh. Requests are directed to the istio-ingress entry point
+using the Ingress resource (proxy-gateway). Istio-ingress acts as a gateway and sends traffic to
+the proxy-access-control service. Proxy-access-control mirrors traffic to the snort-ids
+service for it to monitor all incoming HTTP requests. The snort-ids asynchronously sends alert
+notifications to proxy-access-control over GRPC on port 50054, which is denoted in red, and
+stores the details of the alert events into Redis for other services to potentially inspect.
+
+Proxy-access-control also sends traffic to the http-lb load balancing service. Http-lb deploys
+two versions (http-lb-v1, http-lb-v2) of itself by sharing the same app name (http-lb) but using
+a distinct version in the Kubernetes manifest. By default, without any further configuration,
+Istio will load balance requests with a 50/50 percentage split among these two http-lb versions.
+Both the load balancers are internally configured by default to send traffic to clover-server1/2/3
+in round-robin fashion.
+
+A controlling agent that can reside inside or outside of the mesh can be used to modify the
+run-time configuration of the services, which is denoted in green. Python sample scripts that
+implement a GRPC client act as a control-agent and are used to reconfigure http-lb-v2 to load
+balance across clover-server4/5 instead of servers 1/2/3. The sample application provides
+additional examples of modifying run-time configurations such as adding user-defined rules
+to the snort-ids service to trigger alerts on other network events.
+
+Deploying the sample app
+========================
+
+Prerequisites
+-------------
+
+The following assumptions must be met before continuing on to deployment:
+
+ * Ubuntu 16.04 was used heavily for development and is advised for greenfield deployments.
+ * Installation of Docker has already been performed. It's preferable to install Docker CE.
+ * Installation of Kubernetes has already been performed. The installation in this guide was
+   executed in a single-node Kubernetes cluster on a modest virtual machine.
+ * Installation of a pod network that supports the Container Network Interface (CNI). It is
+   recommended to use flannel, as most development work employed this network add-on.
+ * Installation of Istio and Istio client (istioctl) is in your PATH (for deploy from source)
+
+Deploy with Clover container
+----------------------------
+
+The easiest way to deploy the sample is to use the Clover container by pulling the
+container and executing a top-level deploy script using the following two commands:
+
+.. code-block:: bash
+
+    $ docker pull opnfv/clover:<release_tag>
+
+The <release_tag> is **6.0.0** for the Fraser release. However, the latest
+will be pulled if the tag is unspecified.
+
+.. code-block:: bash
+
+    $ sudo docker run --rm \
+    -v ~/.kube/config:/root/.kube/config \
+    opnfv/clover \
+    /bin/bash -c '/home/opnfv/repos/clover/samples/scenarios/deploy.sh'
+
+The deploy script invoked above begins by installing Istio 0.6.0 into your Kubernetes environment.
+It proceeds to deploy the entire SDC manifest. If you've chosen to employ this method of
+deployment, you may skip the next section.
+
+Deploy from source
+------------------
+
+Ensure Istio 0.6.0 is installed, as a prerequisite, using the following commands:
+
+.. code-block:: bash
+
+    $ curl -L https://github.com/istio/istio/releases/download/0.6.0/istio-0.6.0-linux.tar.gz | tar xz
+    $ cd istio-0.6.0
+    $ export PATH=$PWD/bin:$PATH
+    $ kubectl apply -f install/kubernetes/istio.yaml
+
+The above sequence of commands installs Istio with manual sidecar injection without mutual TLS
+authentication between sidecars.
+
+To continue to deploy from the source code, clone the Clover git repository and navigate
+within the samples directory as shown below:
+
+.. code-block:: bash
+
+    $ git clone https://gerrit.opnfv.org/gerrit/clover
+    $ cd clover/samples/scenarios
+    $ git checkout stable/fraser
+
+To deploy the sample in the default Kubernetes namespace, use the following command for Istio
+manual sidecar injection:
+
+.. code-block:: bash
+
+    $ kubectl apply -f <(istioctl kube-inject --debug -f service_delivery_controller_opnfv.yaml)
+
+To deploy in another namespace, use the '-n' option. An example namespace of 'sdc' is shown below:
+
+.. code-block:: bash
+
+    $ kubectl create namespace sdc
+    $ kubectl apply -n sdc -f <(istioctl kube-inject --debug -f service_delivery_controller_opnfv.yaml)
+
+When using the above SDC manifest, all required docker images will automatically be pulled
+from the OPNFV public Dockerhub registry. An example of using a Docker local registry is also
+provided in the ``/clover/samples/scenario`` directory.
+
+Verifying the deployment
+------------------------
+
+To verify the entire SDC sample is deployed, ensure the following pods have been deployed
+with the command below:
+
+.. code-block:: bash
+
+    $ kubectl get pod --all-namespaces
+
+The listing below must include the following SDC pods assuming deployment in the default
+Kubernetes namespace:
+
+.. code-block:: bash
+
+    $ NAMESPACE      NAME                                    READY     STATUS
+    default        clover-server1-68c4755d9c-7s5q8           2/2       Running
+    default        clover-server2-57d8b786-rf5x7             2/2       Running
+    default        clover-server3-556d5f79cf-hk6rv           2/2       Running
+    default        clover-server4-6d9469b884-8srbk           2/2       Running
+    default        clover-server5-5d64f74bf-l7wqc            2/2       Running
+    default        http-lb-v1-59946c5744-w658d               2/2       Running
+    default        http-lb-v2-5df78b6849-splp9               2/2       Running
+    default        proxy-access-control-6b564b95d9-jg5wm     2/2       Running
+    default        redis                                     2/2       Running
+    default        snort-ids-5cc97fc6f-zhh5l                 2/2       Running
+
+The result of the Istio deployment must include the following pods:
+
+.. code-block:: bash
+
+    $ NAMESPACE    NAME                               READY     STATUS
+    istio-system   istio-ca-59f6dcb7d9-9frgt          1/1       Running
+    istio-system   istio-ingress-779649ff5b-mcpgr     1/1       Running
+    istio-system   istio-mixer-7f4fd7dff-mjpr8        3/3       Running
+    istio-system   istio-pilot-5f5f76ddc8-cglxs       2/2       Running
+
+Determining the ingress IP and port
+-----------------------------------
+
+To determine how incoming http traffic on port 80 will be translated, use the following command:
+
+.. code-block:: bash
+
+    $ kubectl get svc -n istio-system
+    NAME                TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)
+    istio-ingress       LoadBalancer   10.104.208.165   <pending>     80:32410/TCP,443:31045/TCP
+
+**Note, the CLUSTER-IP of the service will be unused in this example since load balancing service
+types are unsupported in this configuration. It is normal for the EXTERNAL-IP to show status
+<pending> indefinitely**
+
+In this example, traffic arriving on port 32410 will flow to istio-ingress. The
+istio-ingress service will route traffic to the proxy-access-control service based on a
+configured ingress rule, which defines a gateway for external traffic to enter
+the Istio service mesh. This makes the traffic management and policy features of Istio available
+for edge services.
+
+Using the sample app
+====================
+
+To confirm the scenario is running properly, HTTP GET requests can be made from an external
+host with a destination of the Kubernetes cluster. Requests can be invoked from the host OS
+of the Kubernetes cluster. Modify the port used below (32410) with the port obtained from section
+`Determining the ingress IP and port`_. If flannel is being used, requests can use the default
+flannel CNI IP address, as shown below:
+
+.. code-block:: bash
+
+    $ wget http://10.244.0.1:32410/
+    $ curl http://10.244.0.1:32410/
+
+An HTTP response will be returned as a result of the wget or curl command, if the SDC sample
+is operating correctly. However, the visibility into what services were accessed within
+the service mesh remains hidden. The next section `Exposing tracing and monitoring`_ shows how
+to inspect the internals of the Istio service mesh.
+
+Exposing tracing and monitoring
+-------------------------------
+
+To gain insight into the service mesh, the Jaeger tracing and Prometheus monitoring tools
+can also be deployed. These tools can show how the sample functions in the service mesh.
+Using the Clover container, issue the following command to deploy these tools
+into your Kubernetes environment:
+
+.. code-block:: bash
+
+    $ sudo docker run --rm \
+    -v ~/.kube/config:/root/.kube/config \
+    opnfv/clover \
+    /bin/bash -c '/home/opnfv/repos/clover/samples/scenarios/view.sh'
+
+The Jaeger tracing UI is exposed outside of the Kubernetes cluster via any node IP in the cluster
+using the following commands **(above command already executes the two commands below)**:
+
+.. code-block:: bash
+
+    $ kubectl expose -n istio-system deployment jaeger-deployment --port=16686 --type=NodePort
+
+Likewise, the Promethues monitoring UI is exposed with the following command:
+
+.. code-block:: bash
+
+    $ kubectl expose -n istio-system deployment prometheus --port=9090 --type=NodePort
+
+To find the ports the Jaeger tracing and Prometheus monitoring UIs are exposed on, use the
+following command:
+
+.. code-block:: bash
+
+    $ kubectl get svc --all-namespaces
+    NAMESPACE      NAME              TYPE      CLUSTER-IP   EXTERNAL-IP   PORT(S)
+    istio-system   jaeger-deployment NodePort  10.105.94.85 <none>        16686:32174/TCP
+    istio-system   prometheus        NodePort  10.97.74.230 <none>        9090:32708/TCP
+
+In the example above, the Jaeger tracing web-based UI will be available on port 32171 and
+the Prometheus monitoring UI on port 32708. In your browser, navigate to the following
+URLs for Jaeger and Prometheus respectively::
+
+    http://<node IP>:32174
+    http://<node IP>:32708
+
+Where node IP is an IP from one of the Kubernetes cluster node(s).
+
+.. image:: imgs/sdc_tracing.png
+    :align: center
+    :scale: 100%
+
+The diagram above shows the Jaeger tracing UI after traces have been fetched for the
+proxy-access-control service. After executing an HTTP request using the simple curl/wget
+commands outlined in `Using the sample app`_ , a list of SDC services will be displayed
+in the top left drop-down box labelled ``Service``. Choose ``proxy-access-control`` in
+the drop-down and click the ``Find Traces`` button at the bottom of the left controls.
+The blue box denotes what should be displayed for the services that were involved in
+handling the request including:
+
+ * istio-ingress
+ * proxy-access-control
+ * http-lb
+ * clover-server1 OR clover-server2 OR clover-server3
+
+The individual traces can be clicked on to see the details of the messages between services.
+
+Modifying the run-time configuration of services
+================================================
+
+The following control-plane actions can be invoked via GRPC messaging from a controlling agent.
+For this example, it is conducted from the host OS of a Kubernetes cluster node.
+
+**Note, the subsequent instructions assume the flannel network CNI plugin is installed. Other
+Kubernetes networking plugins may work but have not been validated.**
+
+Modifying the http-lb server list
+----------------------------------
+
+By default, both versions of the load balancers send incoming HTTP requests to clover-server1/2/3
+in round-robin fashion. To have the version 2 load balancer (http-lb-v2) send its traffic to
+clover-server4/5 instead, issue the following command:
+
+.. code-block:: bash
+
+    $ sudo docker run --rm \
+    -v ~/.kube/config:/root/.kube/config \
+    opnfv/clover \
+    /bin/bash -c 'python /home/opnfv/repos/clover/samples/services/nginx/docker/grpc/nginx_client.py \
+    --service_type=lbv2 --service_name=http-lb-v2'
+
+Adding rules to snort-ids
+--------------------------
+
+The snort service installs the readily available community rules. An initial, basic provision to
+allow custom rule additions has been implemented within this release. A custom rule will trigger
+alerts and can be defined in order to inspect network traffic. This capability, including
+rule manipulation, will be further expounded upon in subsequent releases. For the time being, the
+following basic rule additions can be performed using a client sample script.
+
+A snort IDS alert can be triggered by adding the HTTP User-Agent string shown below. The
+signature that invokes this alert is part of the community rules that are installed in the
+snort service by default. Using the curl or wget commands below, an alert can be observed using
+the Jaeger tracing browser UI. It will be displayed as a GRPC message on port 50054 from the
+**snort-ids** service to the **proxy-access-control** service.
+
+.. code-block:: bash
+
+    $ wget -U 'asafaweb.com' http://10.244.0.1:32410/
+
+Or alternatively with curl, issue this command to trigger the alert:
+
+.. code-block:: bash
+
+    $ curl -A 'asafaweb.com' http://10.244.0.1:32410/
+
+The community rule can be copied to local rules in order to ensure an alert is generated
+each time the HTTP GET request is observed by snort using the following command.
+
+.. code-block:: bash
+
+    $ sudo docker run --rm \
+    -v ~/.kube/config:/root/.kube/config \
+    opnfv/clover \
+    /bin/bash -c 'python /home/opnfv/repos/clover/samples/services/snort_ids/docker/grpc/snort_client.py \
+    --cmd=addscan --service_name=snort-ids'
+
+To add an ICMP rule to snort service, use the following command:
+
+.. code-block:: bash
+
+    $ sudo docker run --rm \
+    -v ~/.kube/config:/root/.kube/config \
+    opnfv/clover \
+    /bin/bash -c 'python /home/opnfv/repos/clover/samples/services/snort_ids/docker/grpc/snort_client.py \
+    --cmd=addicmp --service_name=snort-ids'
+
+The above command will trigger alerts whenever ICMP packets are observed by the snort service.
+An alert can be generated by pinging the snort service using the flannel IP address assigned to
+the **snort-ids** pod.
+
+Advanced Usage
+===============
+
+A-B Validation
+--------------
+
+Please see the configuration guide at :ref:`a_b_config_guide` for details on
+validating A-B route rules using the sample in this guide.
+
+Uninstall from Kubernetes envionment
+====================================
+
+Delete with Clover container
+----------------------------
+
+When you're finished working on the SDC sample, you can uninstall it with the
+following command:
+
+.. code-block:: bash
+
+     $ sudo docker run --rm \
+    -v ~/.kube/config:/root/.kube/config \
+    opnfv/clover \
+    /bin/bash -c '/home/opnfv/repos/clover/samples/scenarios/clean.sh'
+
+The command above will remove the SDC sample services, Istio components and Jaeger/Prometheus
+tools from your Kubernetes environment.
+
+Delete from source
+------------------
+
+The SDC sample services can be uninstalled from the source code using the commands below:
+
+.. code-block:: bash
+
+    $ cd clover/samples/scenarios
+    $ kubectl delete -f service_delivery_controller_opnfv.yaml
+
+    pod "redis" deleted
+    service "redis" deleted
+    deployment "clover-server1" deleted
+    service "clover-server1" deleted
+    deployment "clover-server2" deleted
+    service "clover-server2" deleted
+    deployment "clover-server3" deleted
+    service "clover-server3" deleted
+    deployment "clover-server4" deleted
+    service "clover-server4" deleted
+    deployment "clover-server5" deleted
+    service "clover-server5" deleted
+    deployment "http-lb-v1" deleted
+    deployment "http-lb-v2" deleted
+    service "http-lb" deleted
+    deployment "snort-ids" deleted
+    service "snort-ids" deleted
+    deployment "proxy-access-control" deleted
+    service "proxy-access-control" deleted
+    ingress "proxy-gateway" deleted
+
+Istio components will not be uninstalled with the above command, which deletes using the SDC
+manifest file. To remove the Istio installation, navigate to the root directory where Istio
+was installed from source and use the following command:
+
+.. code-block:: bash
+
+    $ cd istio-0.6.0
+    $ kubectl delete -f install/kubernetes/istio.yaml
+
+
+Uninstall from Docker environment
+=================================
+
+The OPNFV docker images can be removed with the following commands:
+
+.. code-block:: bash
+
+    $ docker rmi opnfv/clover-ns-nginx-proxy
+    $ docker rmi opnfv/clover-ns-nginx-lb
+    $ docker rmi opnfv/clover-ns-nginx-server
+    $ docker rmi opnfv/clover-ns-snort-ids
+    $ docker rmi opnfv/clover
+
+The Redis, Prometheus and Jaeger docker images can be removed with the following commands:
+
+.. code-block:: bash
+
+    $ docker rmi k8s.gcr.io/redis
+    $ docker rmi kubernetes/redis
+    $ docker rmi prom/prometheus
+    $ docker rmi jaegertracing/all-in-one
+
+If docker images were built locally, they can be removed with the following commands:
+
+.. code-block:: bash
+
+    $ docker rmi localhost:5000/clover-ns-nginx-proxy
+    $ docker rmi clover-ns-nginx-proxy
+    $ docker rmi localhost:5000/clover-ns-nginx-lb
+    $ docker rmi clover-ns-nginx-lb
+    $ docker rmi localhost:5000/clover-ns-nginx-server
+    $ docker rmi clover-ns-nginx-server
+    $ docker rmi localhost:5000/clover-ns-snort-ids
+    $ docker rmi clover-ns-snort-ids