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Install Dragonfly & Nydus on Kubernetes

This document will help you experience how to use Dragonfly & Nydus.

Prerequisites

Name Version Document
Kind v0.17.0+ kind.sigs.k8s.io
Helm v3.11.0+ helm.sh
kubectl v1.23.17+ kubernetes.io
docker v23.0.3+ docker.com

Notice: Kind is recommended if no kubernetes cluster is available for testing.

Setup kubernetes cluster

Download containerd configuration for kind.

curl -fsSL -o config.toml https://raw.githubusercontent.com/dragonflyoss/Dragonfly2/main/test/testdata/containerd/config.toml

Create kind cluster configuration file kind-config.yaml, configuration content is as follows:

cat <<EOF > kind-config.yaml
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
networking:
  ipFamily: dual
nodes:
  - role: control-plane
    image: kindest/node:v1.23.17
    extraPortMappings:
      - containerPort: 4001
        hostPort: 4001
        protocol: TCP
    extraMounts:
      - hostPath: ./config.toml
        containerPath: /etc/containerd/config.toml
      - hostPath: /tmp/artifact
        containerPath: /tmp/artifact
      - hostPath: /dev/fuse
        containerPath: /dev/fuse
EOF

Create a kind cluster using the configuration file:

$ kind create cluster --config kind-config.yaml
Creating cluster "kind" ...
 ✓ Ensuring node image (kindest/node:v1.23.17) 🖼
 ✓ Preparing nodes 📦
 ✓ Writing configuration 📜
 ✓ Starting control-plane 🕹️
 ✓ Installing CNI 🔌
 ✓ Installing StorageClass 💾
Set kubectl context to "kind-kind"
You can now use your cluster with:

kubectl cluster-info --context kind-kind

Thanks for using kind! 😊

Switch the context of kubectl to kind cluster:

kubectl config use-context kind-kind

Install Dragonfly based on Helm Charts

Install Dragonfly using the configuration:

$ helm repo add dragonfly https://dragonflyoss.github.io/helm-charts/
$ helm install --wait --timeout 10m --dependency-update --create-namespace --namespace dragonfly-system dragonfly dragonfly/dragonfly --set client.config.proxy.prefetch=true,seedClient.config.proxy.prefetch=true
NAME: dragonfly
LAST DEPLOYED: Fri Apr  7 10:35:12 2023
NAMESPACE: dragonfly-system
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
1. Get the scheduler address by running these commands:
  export SCHEDULER_POD_NAME=$(kubectl get pods --namespace dragonfly-system -l "app=dragonfly,release=dragonfly,component=scheduler" -o jsonpath={.items[0].metadata.name})
  export SCHEDULER_CONTAINER_PORT=$(kubectl get pod --namespace dragonfly-system $SCHEDULER_POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
  kubectl --namespace dragonfly-system port-forward $SCHEDULER_POD_NAME 8002:$SCHEDULER_CONTAINER_PORT
  echo "Visit http://127.0.0.1:8002 to use your scheduler"

2. Configure runtime to use dragonfly:
  https://d7y.io/docs/getting-started/quick-start/kubernetes/

Check that Dragonfly is deployed successfully:

$ kubectl wait po --all -n dragonfly-system --for=condition=ready --timeout=10m
pod/dragonfly-client-gs924 condition met
pod/dragonfly-manager-5d97fd88fb-txnw9 condition met
pod/dragonfly-manager-5d97fd88fb-v2nmh condition met
pod/dragonfly-manager-5d97fd88fb-xg6wr condition met
pod/dragonfly-mysql-0 condition met
pod/dragonfly-redis-master-0 condition met
pod/dragonfly-redis-replicas-0 condition met
pod/dragonfly-redis-replicas-1 condition met
pod/dragonfly-redis-replicas-2 condition met
pod/dragonfly-scheduler-0 condition met
pod/dragonfly-scheduler-1 condition met
pod/dragonfly-scheduler-2 condition met
pod/dragonfly-seed-client-0 condition met
pod/dragonfly-seed-client-1 condition met
pod/dragonfly-seed-client-2 condition met

Install Nydus based on Helm Charts

Install Nydus using the default configuration, for more information about mirrors configuration, please refer to document.

$ curl -fsSL -o config-nydus.yaml https://raw.githubusercontent.com/dragonflyoss/Dragonfly2/main/test/testdata/charts/config-nydus.yaml
$ helm install --wait --timeout 10m --dependency-update --create-namespace --namespace nydus-snapshotter nydus-snapshotter dragonfly/nydus-snapshotter -f config-nydus.yaml
NAME: nydus-snapshotter
LAST DEPLOYED: Fri Apr  7 10:40:50 2023
NAMESPACE: nydus-snapshotter
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
Thank you for installing nydus-snapshotter.

Your release is named nydus-snapshotter.

To learn more about the release, try:

  $ helm status nydus-snapshotter
  $ helm get all nydus-snapshotter

Check that Nydus is deployed successfully:

$ kubectl wait po --all -n nydus-snapshotter --for=condition=ready --timeout=1m
pod/nydus-snapshotter-6mwlv condition met

Run Nydus Image in Kubernetes

Create Nginx pod configuration file nginx-nydus.yaml with Nydus image ghcr.io/dragonflyoss/image-service/nginx:nydus-latest. For more details about how to build nydus image, please refer to the document.

cat <<EOF > nginx-nydus.yaml
apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
    - name: nginx
      image: ghcr.io/dragonflyoss/image-service/nginx:nydus-latest
      imagePullPolicy: Always
      command: ["sh", "-c"]
      args:
        - tail -f /dev/null
EOF

Create a Nginx pod using the configuration file:

kubectl apply -f nginx-nydus.yaml

Check that Nginx is deployed successfully:

$ kubectl wait po nginx --for=condition=ready --timeout=1m
pod/nginx condition met

Executing the date command in the Nginx container.

$ kubectl exec -it nginx -- date
Mon Apr 10 07:57:38 UTC 2023

Verify downloaded Nydus image via Dragonfly

Verify downloaded Nydus image via Dragonfly based on mirror mode:

$ CLIENT_POD_NAME=`kubectl -n dragonfly-system get pod -l component=client --no-headers -o custom-columns=NAME:metadata.name`
$ kubectl -n dragonfly-system exec -it ${CLIENT_POD_NAME} -- sh -c 'grep "download task succeeded" /var/log/dragonfly/dfdaemon/dfdaemon.log'
2024-05-28T12:36:24.861903Z INFO download_task: dragonfly-client/src/grpc/dfdaemon_download.rs:276: download task succeeded host_id="127.0.0.1-kind-worker" task_id="4535f073321f0d1908b8c3ad63a1d59324573c0083961c5bcb7f38ac72ad598d" peer_id="127.0.0.1-kind-worker-13095fb5-786a-4908-b8c1-744be144b383"

Performance testing

Test the performance of single-machine image download after the integration of Dragonfly and Nydus, please refer to document.

Notes

Install Dragonfly and Nydus in Alibaba Cloud ACK

If you are using Dragonfly and Nydus in Alibaba Cloud ACK, you should follow the steps when deploying Dragonfly.

Create Draognfly configuration file d7y-config.yaml, configuration content is as follows:

cat <<EOF > d7y-config.yaml
seedClient:
  persistence:
    storageClass: "alicloud-disk-essd"
    size: 20Gi

redis:
  master:
    persistence:
      storageClass: "alicloud-disk-essd"
      size: 20Gi
  replica:
    persistence:
      storageClass: "alicloud-disk-essd"
      size: 20Gi

mysql:
  primary:
    persistence:
      storageClass: "alicloud-disk-essd"
      size: 20Gi
EOF

Install Dragonfly using the params:

$ helm repo add dragonfly https://dragonflyoss.github.io/helm-charts/
$ helm install --wait --timeout 10m --dependency-update --create-namespace --namespace dragonfly-system dragonfly dragonfly/dragonfly --set client.config.proxy.prefetch=true,seedClient.config.proxy.prefetch=true-f d7y-config.yaml
NAME: dragonfly
LAST DEPLOYED: Fri Apr  7 10:35:12 2023
NAMESPACE: dragonfly-system
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
1. Get the scheduler address by running these commands:
  export SCHEDULER_POD_NAME=$(kubectl get pods --namespace dragonfly-system -l "app=dragonfly,release=dragonfly,component=scheduler" -o jsonpath={.items[0].metadata.name})
  export SCHEDULER_CONTAINER_PORT=$(kubectl get pod --namespace dragonfly-system $SCHEDULER_POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
  kubectl --namespace dragonfly-system port-forward $SCHEDULER_POD_NAME 8002:$SCHEDULER_CONTAINER_PORT
  echo "Visit http://127.0.0.1:8002 to use your scheduler"

2. Configure runtime to use dragonfly:
  https://d7y.io/docs/getting-started/quick-start/kubernetes/

Check that Dragonfly is deployed successfully:

$ kubectl wait po --all -n dragonfly-system --for=condition=ready --timeout=10m
pod/dragonfly-client-gs924 condition met
pod/dragonfly-manager-5d97fd88fb-txnw9 condition met
pod/dragonfly-manager-5d97fd88fb-v2nmh condition met
pod/dragonfly-manager-5d97fd88fb-xg6wr condition met
pod/dragonfly-mysql-0 condition met
pod/dragonfly-redis-master-0 condition met
pod/dragonfly-redis-replicas-0 condition met
pod/dragonfly-redis-replicas-1 condition met
pod/dragonfly-redis-replicas-2 condition met
pod/dragonfly-scheduler-0 condition met
pod/dragonfly-scheduler-1 condition met
pod/dragonfly-scheduler-2 condition met
pod/dragonfly-seed-client-0 condition met
pod/dragonfly-seed-client-1 condition met
pod/dragonfly-seed-client-2 condition met