Linkerd Service Mesh Guide¶

This guide explains how to install and use Linkerd in LocalCloudLab.

1. Install Linkerd CLI¶

curl -sL https://run.linkerd.io/install | bash
export PATH=$PATH:$HOME/.linkerd2/bin

Validate Cluster

linkerd check --pre

Install Control Plane

linkerd install | kubectl apply -f -
linkerd check

Install Viz Extension

linkerd viz install | kubectl apply -f -
linkerd viz check

Inject Mesh into Workloads

Example for search namespace:

kubectl get deploy -n search -o yaml \
  | linkerd inject - \
  | kubectl apply -f -

Repeat for:

checkin
postgres
redis
rabbitmq
gateway
Use Linkerd Tools

Live traffic:¶

linkerd viz tap deploy/search-api -n search

Route metrics:¶

linkerd viz routes deploy/search-api -n search

Dashboard:¶

linkerd viz dashboard

Canary & Traffic Split (Mesh-Level)

apiVersion: split.smi-spec.io/v1alpha1
kind: TrafficSplit
metadata:
  name: search-api
spec:
  service: search-api
  backends:
  - service: search-api-v1
    weight: 90
  - service: search-api-v2
    weight: 10

Summary

✔ mTLS for all services ✔ Traffic management ✔ Observability tools ✔ Canary deployments