Kubernetes capstan

Introduction

Capstan is a testing automation framework for workloads which managed by helm and running on Kubernetes. By adding a test script for a new workload, you can obtain the performance data of a new workload and the capability data of Kubernetes when running the new workload easily. Capstan can help you to choose your own Kubernetes cluster by comparing the test data of different Kubernetes clusters and know where are the bottlenecks of your Kubernetes cluster for each type of workload.

What is the scope of this project

capstan aims to provide a testing automation framework which has excellent extensibility for workloads which managed by helm and running on Kubernetes:

• Start a workload and run test script for each test case sequentially.

• Collect the testing results and the performance data of Kubernetes component and Kubernetes cluster.

• Analysis and display the testing results.

• Generate a testing report and performance report.

What is not in scope for this project

• Building a new cluster lifecycle management tool(e.g. kubeadm,kops,kubernetes-anywhere).

• Building a new data collection and analysis tool(e.g. cadvisor,heapster).

Prerequisites Installation

• Go: 1.9.3+
• Helm

QuickStart

In the quickstart, we use the default config to run capstan. You can also specify your own config.

Prepare Kubernetes admin config file

Copy the Kubernetes admin config file to the host path /etc/kubernetes/admin.conf

export KUBECONFIG=/etc/kubernetes/admin.conf

Install kubectl

curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl

chmod +x ./kubectl

sudo mv ./kubectl /usr/local/bin/kubectl

Install helm

Here is helm installtion. After installtion, you should helm init.

Build capstan

mkdir -p $GOPATH/src/github.com/ZJU-SEL
git clone https://github.com/ZJU-SEL/capstan.git $GOPATH/src/github.com/ZJU-SEL/capstan
cd $GOPATH/src/github.com/ZJU-SEL/capstan
make && make install

Deploy capstan

# install Docker
apt-get install docker.io -y

# install jq. It is used in quickstart.sh
apt-get install jq

# configure Prometheus
cat >/etc/capstan/prometheus/prometheus.yml <<EOF
global:
  scrape_interval: 15s
  scrape_timeout: 10s
scrape_configs:
  - job_name: 'pushgateway'
    static_configs:
      - targets: ['<Your-HostIP>:9091']
  - job_name: 'aliyun'
    static_configs:
      - targets: ['<Your-Kubernetes in aliyun-MasterIP>:31672','<Your-Kubernetes in aliyun-Node1IP>:31672','<Your-Kubernetes in aliyun-Node2IP>:31672',...]
EOF

# deploy
cd $GOPATH/src/github.com/ZJU-SEL/capstan/deploy
./quickstart.sh

Start capstan

capstan --v=3 --logtostderr --config=/etc/capstan/config --kubeconfig=/etc/kubernetes/admin.conf &

Display

You can visit <Your-HostIP>:3000 to see Grafana. There is a default user "admin", and its password is "admin".

Documentation

• Deploying
• How to add a new workload and test it

Roadmap

• Design and Implement the framework of capstan（P0).
• Use Prometheus and Grafana to analysis and display the testing results（P0).
• Add typical workloads and the corresponding test script（P1).
• Implement a online ranking system（P2).