SD-Fabric Deployment

Update aether-pod-configs

aether-app-configs is a git project hosted on gerrit.opencord.org and we placed the following materials in it.

  • Rancher Fleet’s configuration to install SD-Fabric applications on Rancher, including ONOS, Stratum, Telegraf and PFCP-Agent.

  • Customized configuration for each application (helm values).

  • Application specific configuration files, including ONOS network configuration and Stratum chassis config.

Here is an example folder structure:

╰─$ tree aether-dev/app/onos aether-dev/app/stratum aether-dev/app/pfcp-agent aether-dev/app/telegraf
├── fleet.yaml
├── kustomization.yaml
├── overlays
│   ├── dev-pairedleaves-tucson
│   │   └── values.yaml
│   ├── dev-pdp-menlo
│   │   └── values.yaml
│   └── dev-sdfabric-menlo
│       └── values.yaml
└── registry-sealed-secret.yaml
aether-dev/app/stratum
├── fleet.yaml
└── overlays
   ├── dev-pairedleaves-tucson
   │   ├── kustomization.yaml
   │   ├── leaf1
   │   ├── leaf2
   │   ├── qos-config-leaf1.yaml
   │   ├── qos-config-leaf2.yaml
   │   └── values.yaml
   └── dev-sdfabric-menlo
      ├── kustomization.yaml
      ├── menlo-sdfabric-leaf1
      ├── menlo-sdfabric-leaf2
      └── values.yaml
aether-dev/app/pfcp-agent
├── fleet.yaml
└── overlays
   ├── dev-pairedleaves-tucson
   │   └── values.yaml
   └── dev-sdfabric-menlo
      └── values.yaml
aether-dev/app/telegraf
├── fleet.yaml
└── overlays
   ├── dev-pairedleaves-tucson
   │   └── values.yaml
   └── dev-sdfabric-menlo
      └── values.yaml

App folder

Rancher Fleet reads fleet.yaml to know where to download the Helm Chart manifest and how to customize the deployment for each target clusters.

Here is the example of fleet.yaml which downloads SD-Fabric(1.0.18) Helm Chart from https://charts.aetherproject.org and then use the overlays/$cluster_name/values.yaml to customize each cluster.

# SPDX-FileCopyrightText: 2021-present Open Networking Foundation <info@opennetworking.org>

defaultNamespace: tost
helm:
releaseName: sdfabric
repo: https://charts.aetherproject.org
chart: sdfabric
version: 1.0.18
helm:
   values:
      import:
      stratum:
         enabled: false
targetCustomizations:
- name: dev-sdfabric-menlo
   clusterSelector:
      matchLabels:
      management.cattle.io/cluster-display-name: dev-sdfabric-menlo
   helm:
      valuesFiles:
      - overlays/dev-sdfabric-menlo/values.yaml
- name: dev-pairedleaves-tucson
   clusterSelector:
      matchLabels:
      management.cattle.io/cluster-display-name: dev-pairedleaves-tucson
   helm:
      valuesFiles:
      - overlays/dev-pairedleaves-tucson/values.yaml
- name: dev-pdp-menlo
   clusterSelector:
      matchLabels:
      management.cattle.io/cluster-display-name: dev-pdp-menlo
   helm:
      valuesFiles:
      - overlays/dev-pdp-menlo/values.yaml

values.yaml used to custom your sdfabric Helm chart values and please check SD-Fabric Helm chart to see how to configure it.

ONOS App

For the ONOS application, the most import configuration is network configuration (netcfg) which is environment-dependent configuration and you should configure it properly.

netcfg is configured in the Helm Value files and please check the following example.

╰─$ cat aether-app-configs/aether-dev/app/onos/overlays/dev-sdfabric-menlo/values.yaml                                                                                                                                                    130# SPDX-FileCopyrightText: 2020-present Open Networking Foundation <info@opennetworking.org>

# Value file for SDFabric helm chart.
...
onos-classic:
   config:
      componentConfig:
         "org.onosproject.net.host.impl.HostManager": >
         {
            "monitorHosts": "true",
            "probeRate": "10000"
         }
         "org.onosproject.provider.general.device.impl.GeneralDeviceProvider": >
         {
            "readPortId": true
         }
      netcfg: >
         {
            .....
         }

Please check SD-Fabric Configuration Guide to learn more about network configuration.

Stratum App

Stratum reads the chassis config from the Kubernetes configmap resource but it doesn’t support the function to dynamically reload the chassis config, which means we have to restart the Stratum pod every time when we update the chassis config.

In order to solve this problem without modifying Stratum’s source code, we have introduced the Kustomize to the deployment process. Kustomize supports the function called configMapGenerator which generates the configmap with a hash suffix in its name and then inject this hash-based name to the spec section of Stratum YAML file.

See the following example, you can see the configmap name isn’t fixed.

From the view of the Kubernetes, when it notices the spec of the YAML file is changed, it will redeploy whole Stratum application, which means Stratum will read the updated chassis config eventually.

╰─$ tree aether-dev/app/stratum
├── fleet.yaml
└── overlays
   ├── dev-pairedleaves-tucson
   │   ├── kustomization.yaml
   │   ├── leaf1
   │   ├── leaf2
   │   ├── qos-config-leaf1.yaml
   │   ├── qos-config-leaf2.yaml
   │   └── values.yaml
   └── dev-sdfabric-menlo
      ├── kustomization.yaml
      ├── menlo-sdfabric-leaf1
      ├── menlo-sdfabric-leaf2
      └── values.yaml

╰─$ cat aether-dev/app/stratum/overlays/dev-pairedleaves-tucson/kustomization.yaml
# SPDX-FileCopyrightText: 2021-present Open Networking Foundation <info@opennetworking.org>

configMapGenerator:
- name: stratum-chassis-configs
   files:
      - leaf1
      - leaf2

Check SD-Fabric Doc to learn how to write the chassis config and don’t forget to add the file name into the kustomization.yaml file once you set up your chassis config.

Attention

The switch-dependent config file should be named as ${hostname}. For example, if the host name of your Tofino switch is my-leaf, please name config file my-leaf.

Telegraf App

Below is the example directory structure of Telegraf application.

╰─$ tree aether-dev/app/telegraf                                                                                                                                                                                                 255 ↵
aether-dev/app/telegraf
├── fleet.yaml
└── overlays
   ├── dev-pairedleaves-tucson
   │   └── values.yaml
   └── dev-sdfabric-menlo
      └── values.yaml

The values.yaml used to override the ONOS-Telegraf Helm Chart and its environment-dependent. Please pay attention to the inputs.addresses section. Telegraf will read data from stratum so we need to specify all Tofino switch’s IP addresses here. Taking Menlo staging pod as example, there are four switches so we fill out 4 IP addresses.

config:
   outputs:
      - prometheus_client:
         metric_version: 2
         listen: ":9273"
inputs:
   - cisco_telemetry_gnmi:
      addresses:
         - 10.92.1.81:9339
         - 10.92.1.82:9339
         - 10.92.1.83:9339
         - 10.92.1.84:9339
      redial: 10s
   - cisco_telemetry_gnmi.subscription:
      name: stratum_counters
      origin: openconfig-interfaces
      path: /interfaces/interface[name=*]/state/counters
      sample_interval: 5000ns
      subscription_mode: sample

Create Your Own Configs

Assume we would like to deploy the SD-Fabric to the ace-example cluster in the development environment.

  1. Modify the fleet.yaml to customize your cluster with specific value file.

  2. Add your Helm Values into the overlays folder.

  3. Have to add the chassis config file into the kustomization.yaml for Stratum application.

╰─$ git st
On branch master
Your branch is up to date with 'origin/master'.

Changes to be committed:
(use "git restore --staged <file>..." to unstage)
      modified:   aether-dev/app/onos/fleet.yaml
      new file:   aether-dev/app/onos/overlays/dev-my-cluster/values.yaml
      modified:   aether-dev/app/stratum/fleet.yaml
      new file:   aether-dev/app/stratum/overlays/dev-my-cluster/kustomization.yaml
      new file:   aether-dev/app/stratum/overlays/dev-my-cluster/menlo-sdfabric-leaf1
      new file:   aether-dev/app/stratum/overlays/dev-my-cluster/menlo-sdfabric-leaf2
      new file:   aether-dev/app/stratum/overlays/dev-my-cluster/values.yaml
      modified:   aether-dev/app/telegraf/fleet.yaml
      new file:   aether-dev/app/telegraf/overlays/dev-my-cluster/values.yaml

Quick recap

To recap, most of the files in app folder can be copied from existing examples. However, there are a few files we need to pay extra attentions to.

  • fleet.yaml in each app folder

  • Chassis config in app/stratum/overlays/$cluster_name/ folder There should be one chassis config for each switch. The file name needs to be ${hostname}

  • values.yaml in telegraf folder need to be updated with all switch IP addresses

Double check these files and make sure they have been updated accordingly.

Create a review request

We also need to create a gerrit review request, similar to what we have done in the Aether Runtime Deployment.

Please refer to Aether Runtime Deployment to create a review request.

Deploy to ACE cluster

SD-Fabric is environment dependent application and you have to prepare correct configurations for both ONOS and Stratum to make it work.

Check below section to learn more about how we setup the Jenkins job and how it works

Create SD-Fabric deployment job in Jenkins

We have been using the Rancher Fleet to deploy SD-Fabric as the GitOps approach which means every change we push to the Git repo will be synced to the target cluster automatically.

However, ONOS doesn’t support the incremental upgrade which means we have to delete all ONOS instance and then create all instance again every time we want to upgrade ONOS application.

Rancher Fleet doesn’t support the full recreation during the Application upgrade and that’s reason we have created a Jenkins job to recreate the ONOSs application.

You have to add the Jenkins job for new cluster by modifying aether-ci-management

Download the aether-ci-management repository.

$ cd $WORKDIR
$ git clone "ssh://[username]@gerrit.opencord.org:29418/aether-ci-management"

Create Your Own Jenkins Job

Modify jjb/repos/sdfabric.yaml to add your cluster.

For example, we want to deploy the SD-Fabric to our new cluster my-cluster which is on the staging environment. Add the following content into jjb/repo/sdfabric.yaml.

--- a/jjb/repos/sdfabric.yaml
+++ b/jjb/repos/sdfabric.yaml
@@ -50,6 +50,17 @@
      - "deploy-sdfabric-app":
      - "deploy-debug"

+- project:
+    name: my-cluster
+    disable-job: false
+    fleet-workspace: 'aether-dev'
+    properties:
+      - onf-infra-onfstaff-private
+    jobs:
+      - "deploy-sdfabric-app":
+      - "deploy-debug"
+
+

If your cluster is on the production environment, you have to change both terraform_env and fleet-workspace

Trigger SD-Fabric deployment in Jenkins

Whenever a change is merged into aether-app-config, the Jenkins job should be triggered automatically to (re)deploy SD-Fabric .

You can also manually trigger the job to redeploy SD-Fabric if needed and below is an example of default parameters when you run the job.

../_images/jenkins-sdfabric-params.png

If you want to capture all SD-Fabric related containers logs before redeploying them, please enable POD_LOG option. The Jenkins job helps to redeploy ONOS, Stratum and PFCP-Agent application and the default options is ONOS and Stratum, you can redeploy what you want by click those REDEPLOY_XXXX options.

Verification

Fabric connectivity should be fully ready at this point. We should verify that all servers, including compute nodes and the management router, have an IP address and are able to reach each other via fabric interface before continuing the next step.

This can be simply done by running a ping command from one server to another server’s fabric IP.

Troubleshooting

The deployment process involves the following steps:

  1. Jenkins Job (For ONOS Only)

  2. Rancher Fleet upgrade application based on Git change

  3. Applications be deployed into Kubernetes cluster

  4. ONOS/Stratum will read the configuration (network config, chassis config)

  5. Pod become running

Taking ONOS as an example, here’s what you can do to troubleshoot.

You can see the log message of the first step in Jenkins console. If something goes wrong, the status of the Jenkins job will be in red. If Jenkins doesn’t report any error message, the next step is going to Rancher Fleet’s portal to ensure Fleet works as expected.

Accessing the Stratum CLI

You can login to the Stratum container running on a switch using this script:

#!/bin/bash
echo 'Attaching to Stratum container. Ctrl-P Ctrl-Q to exit'
echo 'Press Enter to continue...'
DOCKER_ID=`docker ps | grep stratum-bf | awk '{print $1}'`
docker attach $DOCKER_ID

You should then see the bf_sde prompt:

bf_sde> pm
bf_sde.pm> show -a

Accessing the ONOS CLI

After setting up kubectl to access the SD-Fabric pods, run:

$ kubectl get pods -n tost

Pick a SD-Fabric pod, and make a port forward to it, then login to it with the onos CLI tool:

$ kubectl -n tost port-forward onos-tost-onos-classic-0 8181 8101
$ onos karaf@localhost

In some rare cases, you may need to access the ONOS master instance CLI, in which case you can run roles:

karaf@root > roles
device:devswitch1: master=onos-tost-onos-classic-1, standbys=[ onos-tost-onos-classic-0 ]

Above lines show that onos-tost-onos-classic-1 is the master. So switch to that by killing the port forward, starting a new one pointing at the master, then logging into that one:

$ ps ax | grep -i kubectl
# returns kubectl commands running, pick the port-forward one and kill it
$ kill 0123
$ kubectl -n tost port-forward onos-tost-onos-classic-1 8181 8101
$ onos karaf@localhost