ryukyi / linux-foundation-kubernetes-2024

Linux Foundation Course using GCP

lfk-2024 - GCP Resource Management Scripts

Google Cloud Platform (GCP) scripts and tutorials for Linux Foundation - Kubernetes Fundamentals LFS258

Prerequisites

• Ensure you have the Google Cloud SDK installed and configured.

• Google cloud account with funds

• Make sure you have the necessary permissions to create and delete resources in the GCP project.

• MAKE SURE TO DELETE WHEN NOT USING 🤑

Usage

Set up environment variables in a .env file or export them directly in your shell session. Alternative declare them in the shell as env vars

Environment Variables

The required variables are:

• SERVICE_ACCOUNT: Service account email associated with the instances.
• PROJECT_ID: Your GCP project ID.
• NETWORK_NAME: Name of the VPC network to create.
• FIREWALL_RULE_NAME_ALLOW_ALL: Name of the firewall rule to allow all traffic.
• FIREWALL_RULE_NAME_SSH: Name of the firewall rule to allow SSH traffic.
• ZONE: Zone where the instances will be created.
• SSH_KEYS: SSH public keys for the instances.
• GCP_NAME: Your GCP account name.

For example, your .env file might look like this:

SERVICE_ACCOUNT=[e-mail] 
PROJECT_ID=my-gcp-project 
NETWORK_NAME=my-vpc-network 
FIREWALL_RULE_NAME_ALLOW_ALL=allow-all-traffic 
FIREWALL_RULE_NAME_SSH=allow-ssh-traffic 
ZONE=us-central1-a 
SSH_KEYS=ssh-rsaed123\ AAAABCDEFGHijklmnopqrstuvwXYZ\ [email protected]
GCP_NAME=usernamebeforeemail

Creating VPC Rules, Firewall and Instances

Run bash script:

./gcp_create_vpc_rules_control_plane_and_worker.sh

Deleting All Resources in Project

Run bash script:

./gcp_delete_all_resources_in_project.sh

Setting up worker

After creating vpc, firewall and control plane and worker above internal host names and certificates need to be updated.

First rename remote machines using your local ssh config:

Host worker1-lfclass
    HostName <XX.XXX.XX.XX>
    User <XXXXX>
    Port 22
    IdentityFile ~/.ssh/linxufoundation

Host cp1-lfclass
    HostName <XX.XXX.XX.XX>
    User <XXXXX>
    Port 22
    IdentityFile ~/.ssh/linxufoundation

ssh into vm and reboot

Do this for all nodes for example control plane:

ssh cp1-lfclass
sudo reboot
ssh worker1-lfclass
sudo reboot

run setup control plane script

ssh into the control plan cp1-lfclass

cp /tmp/*.{sh,yaml} $HOME/
chmod +x $HOME/kube-config-setup-control-plane.sh
$HOME/kube-config-setup-control-plane.sh

manually setup worker

Add k8scp to local hosts in both control plane and workers

# find internal ipv4
hostname -i

output example updated /etc/hosts

127.0.0.1 localhost
10.128.0.4 k8scp # <- add this line

ssh into worker and join the node for example using the copied tokens from cp1-lfclass:

kubeadm join \
    --token 27eee4.6e66ff60318da929 \
    k8scp:6443 \
    --discovery-token-ca-cert-hash \
    sha256:6d541678b05652e1fa5d43908e75e67376e994c3483d6683f2a18673e5d2a1b0

The tokens are created at the end of the script: kube-config-setup-control-plane.sh