linkerd-buoyant

linkerd-buoyant

The Linkerd Buoyant extension connects your Linkerd-enabled Kubernetes cluster to Buoyant Cloud, the global platform health dashboard for Linkerd.

This repo consists of two components:

• agent: Runs on your Kubernetes cluster.
• cli: Runs locally or wherever you install the Linkerd CLI.

Install CLI

To install the CLI, run:

curl -sL https://buoyant.cloud/install | sh

Alternatively, you can download the CLI directly via the releases page.

Usage

$ linkerd-buoyant
linkerd-buoyant manages the Buoyant Cloud agent.

It enables operational control over the Buoyant Cloud agent, providing install,
upgrade, and delete functionality.

Usage:
  linkerd-buoyant [command]

Available Commands:
  check       Check the Buoyant Cloud agent installation for potential problems
  completion  Generate the autocompletion script for the specified shell
  dashboard   Open the Buoyant Cloud dashboard
  help        Help about any command
  install     Output Buoyant Cloud agent manifest for installation
  uninstall   Output Kubernetes manifest to uninstall the Buoyant Cloud agent
  version     Print the CLI and agent version information

Flags:
      --context string      The name of the kubeconfig context to use
  -h, --help                help for linkerd-buoyant
      --kubeconfig string   Path to the kubeconfig file to use for CLI requests (default "/home/sig/.kube/config")
  -v, --verbose             Turn on debug logging

Use "linkerd-buoyant [command] --help" for more information about a command.

Development

Agent

Setup credentials and env vars

export BUOYANT_CLOUD_CLIENT_ID="org-client-id"
export BUOYANT_CLOUD_CLIENT_SECRET="org-client-secret"
export AGENT_NAME="agent-name"

Build and run agent registrator

# Create agent-metadata config map with the desired agent name
cat <<EOF | kubectl apply -f -
kind: Namespace
apiVersion: v1
metadata:
  name: buoyant-cloud
  annotations:
    linkerd.io/inject: enabled
  labels:
    app.kubernetes.io/part-of: buoyant-cloud
    linkerd.io/extension: buoyant
---
kind: ConfigMap
metadata:
  name: agent-metadata
  namespace: buoyant-cloud
  labels:
    app.kubernetes.io/part-of: buoyant-cloud
apiVersion: v1
data:
  agent_name: $AGENT_NAME
EOF

# Run the registrator
bin/go-run agent registrator

Build and run agent

# Read the agent id field (populated by the registrator) in the agent-metadata config map
export AGENT_ID=$(kubectl get cm/agent-metadata -n buoyant-cloud -o jsonpath='{.data.agent_id}')

# Run the agent with the agent id
bin/go-run agent agent --agent-id=$AGENT_ID

Docker build:

docker buildx build -f agent/Dockerfile -t ghcr.io/buoyantio/linkerd-buoyant:latest .

CLI

Build and run:

bin/go-run cli

Run with a version number:

go run -ldflags "-s -w -X github.com/buoyantio/linkerd-buoyant/cli/pkg/version.Version=vX.Y.Z" cli/main.go version

Test against a local server:

bin/go-run cli --bcloud-server http://localhost:8084 check

Protobuf

The generated protobuf bindings in gen come from the proto directory in this repo. If you make changes there, re-generate them with:

bin/gen-proto

Testing

go test -race -cover ./...
bin/lint

Helm

Test template:

helm template --namespace buoyant-cloud --values charts/linkerd-buoyant/ci/fake-values.yaml linkerd-buoyant charts/linkerd-buoyant

Install:

helm install --create-namespace --namespace buoyant-cloud --values charts/linkerd-buoyant/ci/fake-values.yaml linkerd-buoyant charts/linkerd-buoyant

To install a live agent from buoyant.cloud you need to obtain its values.yml. To obtain a values file, head over to https://buoyant.cloud/settings?helm=1. In case you have only one pair of org credentials, you will be prompted with a dialog that contains the helm values. Otherwise, you can pick the exact credentials pair and click on Helm usage. Save the values into agent-values.yaml.

helm install --create-namespace --namespace buoyant-cloud --values agent-values.yaml --set metadata.agentName=$AGENT_NAME linkerd-buoyant charts/linkerd-buoyant

Update chart README.md:

bin/helm-docs --chart-search-root=charts

Release

Note the latest release: https://github.com/BuoyantIO/linkerd-buoyant/releases

TAG=v0.0.XX
git tag $TAG
git push origin $TAG

License

Copyright 2022 Buoyant, Inc. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use these files except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.