Weave Scope is a monitoring tool for Docker and Kubernetes clusters. It allows you to monitor your on-premise Docker host as well as Kubernetes cluster in realtime.
You can visualize the utilization of your containers or your cluster on a web dashboard.
Weave Scope can also be used to manage your docker containers which includes operations such as start,stop containers. You can also access the container shell from Weave Scope.
This guide shall cover how to install Weave Scope on an on-premise Docker host and on a Kubernetes cluster.
Install Weave Scope on Docker host
Run the following commands on a docker host to install Weave Scope:
sudo curl -L git.io/scope -o /usr/local/bin/scope sudo chmod a+x /usr/local/bin/scope
Launch Weave Scope:
$ scope launch
# scope launch 7807556aed11a523d5ec2dc651a438aa6bae7df1a2d76dd440c82530b475c49d Scope probe started Weave Scope is listening at the following URL(s): * http://172.16.34.12:4040/
You can now access Weave scope on
The dashboard will show the containers running on your host and there are several other options to manage and/or monitor your host:
To manage your containers, click one one of them, you will be presented with an interface where you can view the metrics of the container and also do various operations on the container such as start,stop, pause etc. You can also execute the container’s shell as shown below:
General metrics are available at the Table tab:
Install Weave Scope on Kubernetes Cluster
We shall deploy Weave Scope on our K8s cluster and demonstrate how to monitor and manage your cluster using the tool.
Weave Scope service will be exposed via NodePort in this tutorial. It is however NOT advisable to expose Weave Scope service to the internet as this will leave your cluster vulnerable to anyone who can access it.
This means that you should only expose the service if you are running on a local network.
Deploy Weave Scope using the script below:
kubectl apply -f 'https://cloud.weave.works/launch/k8s/weavescope.yaml?k8s-service-type=NodePort'
namespace/weave configured serviceaccount/weave-scope created clusterrole.rbac.authorization.k8s.io/weave-scope created clusterrolebinding.rbac.authorization.k8s.io/weave-scope created deployment.apps/weave-scope-app created service/weave-scope-app created deployment.apps/weave-scope-cluster-agent created daemonset.apps/weave-scope-agent created
This deploys 2 pods,Weave-scope-app and Weave-scope-agent. The Weave-scope-agent runs on every node.
The deployment is also confined in weave namespace.
To see if the deployments have started successfully:
$ kubectl get pods -n weave NAME READY STATUS RESTARTS AGE weave-scope-agent-btpg7 1/1 Running 0 3h20m weave-scope-agent-qmvtx 1/1 Running 0 3h20m weave-scope-app-545ddf96b4-bvmbj 1/1 Running 0 3h20m weave-scope-cluster-agent-74c596c6b7-wnj9r 1/1 Running 0 3h20m
We then need to obtain the NodePort that has been exposed using the command below:
$ kubectl get service -n weave NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE weave-scope-app NodePort 10.111.239.55 <none> 80:32766/TCP 3h25m
In the sample above, the weave-scope-app service has been exposed on port 32766 using NodePort service-type.
We can now access the dashboard through the controller IP and the NodePort.
In the image above, we can visualize our Kubernetes cluster and also manage it.
You can check the logs of different deployments from the dashboard.
From the dashboard, we can also check the health and status of pods.
Weave Scope is easy to install and use. It has interesting features that you would love to explore as a system administrator.
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