Build a Kubernetes cluster with Knative and Ceph

1. Start up a X-node cluster on Cloudlab (X>=4)

1. The following steps require a bash environment. Please configure the default shell in your CloudLab account to be bash. For how to configure bash on Cloudlab, Please refer to the post "Choose your shell": https://www.cloudlab.us/portal-news.php?idx=49
2. When starting a new experiment on Cloudlab, select the small-lan profile
3. In the profile parameterization page, - Set Number of Nodes as X - Set OS image as Ubuntu 20.04 - Set physical node type as xI170 - Set Link Speed as 10Gb/s - Please check Temp Filesystem Max Space - Keep Temporary Filesystem Mount Point as default (/mydata)
4. Wait for the cluster to be initialized (It may take 5 to 10 minutes)
5. Clone this repository on every node git clone https://github.com/chaojin0310/scripts.git and go to the root directory of the repository.

2. Partition the extra disk

Run ./partition.sh at each node. The partition.sh script will reboot the server.

Note that this step is needed to perform only once after the cluster starts, no matter the node is rebooted or reloaded.

3. Mount the smaller partition at ~/data

Run ./mount.sh at each node after the node finishes rebooting.

If you reload the server, you need to start from this step.

4. Set up the environment

1. Run ./env_setup.sh at each node. This script will flush the IP table, install docker and a recent release of go and so on to prepare for the installation of Kubernetes and Knative.
2. Run source ~/.bashrc to activate some necessary environment variables.
3. If you require to compile Knative manually, you have to close current remote connection to the server and reconnect to it. Then run docker login to configure a DockerHub account.

5. Install Kubernetes and Build a k8s cluster

1. Run ./k8s_build.sh at each node. This script compiles k8s from its source code (release-1.25). The make process will last for about 10 minutes. You could also reference to k8s_install.sh to install some k8s tools using apt.
2. Choose a node as your k8s cluster controller.
3. At the controller node, run ./controller.sh <controller_ip>, where <controller_ip> is the public IP address of the controller node.
4. At other nodes, run sudo kubeadm join <controller_ip> --token <token> --discovery-token-ca-cert-hash <hash> after the controller has been intialized. The kubeadm join command is generated at the controller node.

Rebuild the k8s cluster

If you want to modify some k8s code and remake it, run ./k8s_rebuild.sh at each node (you need to add some components that need to be remaked in the script first). Then start from step ./controller.sh <controller_ip>.

6. Install Knative Serving

Run ./kn_install.sh at the controller node.

If you need to compile Knative manually, please refer to kn_build.sh.

7. Install Ceph Object Storage

1. Run ./ceph_install.sh at the controller node.
2. Run source ~/.bashrc after the ceph cluster finishes initialization.

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Build a Ceph object storage on top of a Kubernetes cluster

1. Start up a X-node cluster on Cloudlab (X>=4)

2. Partition the extra disk

3. Mount the smaller partition at ~/data

4. Install k8s and build a cluster

1. Run ./k8s_install.sh master <controller_ip> at the controller node and run ./k8s_install.sh slave at other nodes.
2. At other nodes, run sudo kubeadm join <controller_ip> --token <token> --discovery-token-ca-cert-hash <hash> after the controller has been intialized. The kubeadm join command is generated at the controller node.
3. Run source ~/.bashrc at all nodes.

5. Install Ceph Object Storage

1. Run ./ceph_install.sh at the controller node.
2. Run source ~/.bashrc after the ceph cluster finishes initialization.