emojivoto.yaml

# all resource requirements are removed from the deployments
# to ensure better utilization of nodes rsources.
# otherwise, I ended with many nodes that barely utilized 2% of the CPU
# and are unable to host more pods due to their resource requirements.

apiVersion: v1
kind: Namespace
metadata:
  name: emojivoto
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: emoji
  namespace: emojivoto
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: voting
  namespace: emojivoto
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: web
  namespace: emojivoto
---
apiVersion: v1
kind: Service
metadata:
  name: emoji-svc
  namespace: emojivoto
spec:
  ports:
  - name: grpc
    port: 8080
    targetPort: 8080
  selector:
    app: emoji-svc
---
apiVersion: v1
kind: Service
metadata:
  name: voting-svc
  namespace: emojivoto
spec:
  ports:
  - name: grpc
    port: 8080
    targetPort: 8080
  selector:
    app: voting-svc
---
apiVersion: v1
kind: Service
metadata:
  name: web-svc
  namespace: emojivoto
spec:
  ports:
  - name: http
    port: 80
    targetPort: 8080
  selector:
    app: web-svc
  type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: emoji
  namespace: emojivoto
spec:
  replicas: 1
  selector:
    matchLabels:
      app: emoji-svc
  template:
    metadata:
      labels:
        app: emoji-svc
    spec:
      containers:
      - env:
        - name: GRPC_PORT
          value: "8080"
        image: buoyantio/emojivoto-emoji-svc:v9
        name: emoji-svc
        ports:
        - containerPort: 8080
          name: grpc
      serviceAccountName: emoji
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: vote-bot
  namespace: emojivoto
spec:
  replicas: 1
  selector:
    matchLabels:
      app: vote-bot
  template:
    metadata:
      labels:
        app: vote-bot
    spec:
      containers:
      - command:
        - emojivoto-vote-bot
        env:
        - name: WEB_HOST
          value: web-svc.emojivoto:80
        image: buoyantio/emojivoto-web:v9
        name: vote-bot
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: voting
  namespace: emojivoto
spec:
  replicas: 1
  selector:
    matchLabels:
      app: voting-svc
  template:
    metadata:
      labels:
        app: voting-svc
    spec:
      containers:
      - env:
        - name: GRPC_PORT
          value: "8080"
        image: buoyantio/emojivoto-voting-svc:v9
        name: voting-svc
        ports:
        - containerPort: 8080
          name: grpc
      serviceAccountName: voting
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web
  namespace: emojivoto
spec:
  replicas: 1
  selector:
    matchLabels:
      app: web-svc
  template:
    metadata:
      labels:
        app: web-svc
    spec:
      containers:
      - env:
        - name: WEB_PORT
          value: "8080"
        - name: EMOJISVC_HOST
          value: emoji-svc.emojivoto:8080
        - name: VOTINGSVC_HOST
          value: voting-svc.emojivoto:8080
        - name: INDEX_BUNDLE
          value: dist/index_bundle.js
        image: buoyantio/emojivoto-web:v9
        name: web-svc
        ports:
        - containerPort: 8080
          name: http
      serviceAccountName: web

install-emojivoto.yaml

#!/bin/bash

linkerd_path="${1:-linkerd}"
linkerd_namespace="${2:-linkerd}"
replicas="${replicas:-5}"

root_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

# download emojivoto YAML, remove the namespace resource
emojivoto=$(cat "$root_dir"/emojivoto.yaml)
emojivoto=$(echo "$emojivoto" | tail -n +6)
emojins='namespace: emojivoto'
emojivoto="${emojivoto//$emojins/}"

# remove references to namespace in the service DNS, in the containers arguments
emojins='.emojivoto:'
newns=':'
emojivoto="${emojivoto//$emojins/$newns}"

# inject the emojivoto with the Linkerd proxy
emojivoto=$(echo "$emojivoto" | "$linkerd_path" -l "$linkerd_namespace" inject -)

ns_start_index="1"
ns_end_index="50"
for i in $(eval echo "{$ns_start_index..$ns_end_index}"); do
    emojins=$linkerd_namespace-emoji-$i
    kubectl create ns "$emojins"

    echo "$emojivoto" | kubectl apply -n "$emojins" -f -
    kubectl -n "$emojins" label deploy/emoji deploy/voting deploy/web deploy/vote-bot app=emojivoto
    kubectl -n "$emojins" scale --replicas="$replicas" deploy/emoji deploy/voting deploy/web deploy/vote-bot
    echo ""
done

kustomize.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
  #- linkerd-edge-19.12.1.yaml
- linkerd-dev.yaml
patchesStrategicMerge:
- resources-and-toleration.yaml

resources-and-toleration.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-identity
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: "true"
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "true"
        effect: "NoSchedule"
      containers:
      - name: identity
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "10Mi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-controller
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: "true"
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "true"
        effect: "NoSchedule"
      containers:
      - name: public-api
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "10Mi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-destination
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: "true"
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "true"
        effect: "NoSchedule"
      containers:
      - name: destination
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "10Mi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-grafana
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: "true"
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "true"
        effect: "NoSchedule"
      containers:
      - name: grafana
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "10Mi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-web
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: "true"
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "true"
        effect: "NoSchedule"
      containers:
      - name: web
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "10Mi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-prometheus
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: prometheus
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "prometheus"
        effect: "NoSchedule"
      containers:
      - name: prometheus
        resources:
          requests:
            cpu: "1"
            memory: "1Gi"
          limits:
            cpu: "4"
            memory: "14Gi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-proxy-injector
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: "true"
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "true"
        effect: "NoSchedule"
      containers:
      - name: proxy-injector
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "10Mi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-sp-validator
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: "true"
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "true"
        effect: "NoSchedule"
      containers:
      - name: sp-validator
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "10Mi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: linkerd-tap
  namespace: linkerd
spec:
  template:
    spec:
      nodeSelector:
        linkerd.io/control-plane-component: "true"
      tolerations:
      - key: "linkerd.io/control-plane-component"
        operator: "Equal"
        value: "true"
        effect: "NoSchedule"
      containers:
      - name: tap
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "10Mi"
      - name: linkerd-proxy
        resources:
          limits:
            cpu: "1"
            memory: "250Mi"
          requests:
            cpu: "100m"
            memory: "20Mi"