From a52d9c49b7f4166b18a49b4907a2b0afba3aac05 Mon Sep 17 00:00:00 2001
From: makefunstuff <plugatariov@gmail.com>
Date: Thu, 18 Jul 2024 22:04:29 +0300
Subject: kvm cluster

---
 scripts/make-cluster | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 scripts/setup-kvm    | 48 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 112 insertions(+)
 create mode 100644 scripts/make-cluster
 create mode 100644 scripts/setup-kvm

(limited to 'scripts')

diff --git a/scripts/make-cluster b/scripts/make-cluster
new file mode 100644
index 0000000..90ba009
--- /dev/null
+++ b/scripts/make-cluster
@@ -0,0 +1,64 @@
+#!/bin/bash
+
+# Number of nodes to create
+NUM_NODES=3
+BASE_IMAGE="ubuntu-18.04-minimal-cloudimg-amd64.img"
+NETWORK="default"
+MEMORY=2048
+VCPUS=2
+
+# Generate cloud-init ISO for each node
+for i in $(seq 1 $NUM_NODES); do
+  VM_NAME="k3s-node-$i"
+  CLOUD_INIT_DIR="cloud-init-$VM_NAME"
+  mkdir -p $CLOUD_INIT_DIR
+
+  cat <<EOF > $CLOUD_INIT_DIR/meta-data
+instance-id: $VM_NAME
+local-hostname: $VM_NAME
+EOF
+
+  cp user-data $CLOUD_INIT_DIR/
+
+  # Create cloud-init ISO
+  genisoimage -output $CLOUD_INIT_DIR/cloud-init.iso -volid cidata -joliet -rock $CLOUD_INIT_DIR/user-data $CLOUD_INIT_DIR/meta-data
+
+  # Create VM
+  virt-install \
+    --name $VM_NAME \
+    --memory $MEMORY \
+    --vcpus $VCPUS \
+    --disk size=10,backing_store=$BASE_IMAGE \
+    --disk path=$CLOUD_INIT_DIR/cloud-init.iso,device=cdrom \
+    --os-type linux \
+    --os-variant ubuntu18.04 \
+    --network network=$NETWORK \
+    --graphics none \
+    --console pty,target_type=serial \
+    --import \
+    --noautoconsole
+
+  echo "Created VM $VM_NAME"
+done
+
+# Wait for VMs to boot up and install K3s
+sleep 60
+
+# Get the IP address of the master node
+MASTER_IP=$(virsh domifaddr k3s-node-1 | grep -oP '(\d+\.\d+\.\d+\.\d+)' | head -1)
+
+# Set up the master node
+ssh ubuntu@$MASTER_IP "curl -sfL https://get.k3s.io | sh -"
+
+# Get the K3s token from the master node
+K3S_TOKEN=$(ssh ubuntu@$MASTER_IP "sudo cat /var/lib/rancher/k3s/server/node-token")
+
+# Set up the worker nodes
+for i in $(seq 2 $NUM_NODES); do
+  NODE_IP=$(virsh domifaddr k3s-node-$i | grep -oP '(\d+\.\d+\.\d+\.\d+)' | head -1)
+  ssh ubuntu@$NODE_IP "curl -sfL https://get.k3s.io | K3S_URL=https://$MASTER_IP:6443 K3S_TOKEN=$K3S_TOKEN sh -"
+  echo "Joined k3s-node-$i to the cluster"
+done
+
+echo "K3s cluster setup completed. Master node IP: $MASTER_IP"
+
diff --git a/scripts/setup-kvm b/scripts/setup-kvm
new file mode 100644
index 0000000..fe17d26
--- /dev/null
+++ b/scripts/setup-kvm
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Function to print messages
+print_message() {
+    echo "===================================================================="
+    echo "$1"
+    echo "===================================================================="
+}
+
+# Update the system
+print_message "Updating the system..."
+sudo pacman -Syu --noconfirm
+
+# Install necessary packages
+print_message "Installing necessary packages..."
+sudo pacman -S --noconfirm qemu libvirt virt-manager dnsmasq bridge-utils
+
+# Enable and start the libvirtd service
+print_message "Enabling and starting libvirtd service..."
+sudo systemctl enable libvirtd.service
+sudo systemctl start libvirtd.service
+
+# Add the current user to the libvirt group
+CURRENT_USER=$(whoami)
+print_message "Adding $CURRENT_USER to the libvirt group..."
+sudo usermod -aG libvirt $CURRENT_USER
+
+# Verify virtualization support
+print_message "Verifying virtualization support..."
+VIRT_SUPPORT=$(egrep -c '(vmx|svm)' /proc/cpuinfo)
+if [ "$VIRT_SUPPORT" -gt 0 ]; then
+    echo "Virtualization is supported."
+else
+    echo "Virtualization is not supported. Please enable it in your BIOS/UEFI settings."
+    exit 1
+fi
+
+# Check if the default network is active and start it if not
+print_message "Checking and starting default network..."
+DEFAULT_NET_STATUS=$(sudo virsh net-list --all | grep default | awk '{print $2}')
+if [ "$DEFAULT_NET_STATUS" != "active" ]; then
+    sudo virsh net-start default
+    sudo virsh net-autostart default
+fi
+
+# Print final message
+print_message "KVM setup is complete. Please log out and log back in to apply the user group changes."
+
-- 
cgit 1.4.1-2-gfad0