228 lines
8.0 KiB
Bash
228 lines
8.0 KiB
Bash
#!/bin/bash
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set -e
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VM_NAME="vm-ubuntu2204"
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VCPUS=16
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RAM=16384
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DISK_SIZE=50G
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IMG_URL="https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64.img"
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POOL_DIR="/var/lib/libvirt/images"
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BASE_IMG="$POOL_DIR/jammy-base.img"
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VM_DISK="$POOL_DIR/${VM_NAME}.qcow2"
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SEED_ISO="$POOL_DIR/${VM_NAME}-seed.iso"
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PASSWORD="ubuntu"
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GREEN='\033[0;32m'; YELLOW='\033[1;33m'; RED='\033[0;31m'; NC='\033[0m'
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log() { echo -e "${GREEN}[$(date '+%H:%M:%S')] [INFO]${NC} $1"; }
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warn() { echo -e "${YELLOW}[$(date '+%H:%M:%S')] [WARN]${NC} $1"; }
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err() { echo -e "${RED}[$(date '+%H:%M:%S')] [ERROR]${NC} $1"; }
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step() { echo -e "\n${GREEN}=========================================="; echo -e " $1"; echo -e "==========================================${NC}"; }
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trap 'err "Script failed at line $LINENO. Aborting."' ERR
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echo -e "${GREEN}"
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echo "##############################################"
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echo "# DEPLOY UBUNTU 22.04 VM ON KVM #"
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echo "# VM: $VM_NAME | ${VCPUS} vCPU | $((RAM/1024))GB RAM | $DISK_SIZE #"
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echo "##############################################"
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echo -e "${NC}"
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# ---------------------------------------------
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step "STEP 0/6: ENVIRONMENT CHECKS"
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# ---------------------------------------------
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[ "$EUID" -eq 0 ] || { err "Must be run as root/sudo."; exit 1; }
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log "Running as root: OK"
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if grep -qE 'vmx|svm' /proc/cpuinfo; then
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log "CPU supports hardware virtualization: OK"
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else
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err "CPU does not support VT-x/AMD-V, or it is disabled in BIOS."
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exit 1
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fi
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HOST_CPU=$(nproc); HOST_RAM=$(free -m | awk '/^Mem:/{print $2}')
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log "Host: ${HOST_CPU} CPUs, ${HOST_RAM} MB RAM"
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[ "$HOST_CPU" -lt "$VCPUS" ] && warn "Host has only ${HOST_CPU} CPUs but VM requests ${VCPUS} (overcommit)."
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[ "$HOST_RAM" -lt "$RAM" ] && warn "Host has only ${HOST_RAM} MB RAM but VM requests ${RAM} MB."
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log "Free disk space: $(df -h /var/lib | awk 'NR==2{print $4}')"
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# ---------------------------------------------
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step "STEP 1/6: INSTALLING LIBVIRT / KVM"
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# ---------------------------------------------
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log "Updating apt index..."
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apt-get update -qq
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log "Installing packages: qemu-kvm, libvirt, virtinst, cloud-image-utils..."
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DEBIAN_FRONTEND=noninteractive apt-get install -y -qq \
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qemu-kvm libvirt-daemon-system libvirt-clients \
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virtinst bridge-utils cloud-image-utils wget whois \
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libosinfo-bin osinfo-db-tools
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log "Package installation complete."
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log "Starting libvirtd..."
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systemctl enable --now libvirtd
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systemctl is-active --quiet libvirtd && log "libvirtd is running: OK" || { err "libvirtd failed to start."; exit 1; }
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log "Versions: $(virsh --version) | $(kvm --version | head -1)"
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log "Configuring 'default' NAT network..."
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virsh net-start default 2>/dev/null && log "Started default network." || warn "Default network already running."
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virsh net-autostart default >/dev/null 2>&1 || true
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log "Network status:"
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virsh net-list --all
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# ---------------------------------------------
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step "STEP 2/6: RESOLVING OS-VARIANT"
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# ---------------------------------------------
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os_exists() { osinfo-query os short-id="$1" 2>/dev/null | grep -qw "$1"; }
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OS_VARIANT=""
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log "Checking local osinfo database for ubuntu22.04..."
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if os_exists ubuntu22.04; then
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OS_VARIANT="ubuntu22.04"
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log "Found ubuntu22.04 in osinfo database."
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else
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warn "ubuntu22.04 not found (Ubuntu 20.04 ships an older osinfo-db)."
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log "Attempting to import an updated osinfo database..."
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OSINFO_TAR="/tmp/osinfo-db.tar.xz"
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if wget -q -O "$OSINFO_TAR" "https://releases.pagure.org/libosinfo/osinfo-db-20240701.tar.xz"; then
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if osinfo-db-import --local "$OSINFO_TAR" >/dev/null 2>&1; then
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log "osinfo database imported successfully."
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else
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warn "osinfo-db-import failed."
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fi
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rm -f "$OSINFO_TAR"
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else
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warn "Could not download osinfo-db (no network or URL changed)."
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fi
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log "Re-checking database after import..."
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for v in ubuntu22.04 ubuntu20.04 ubuntu18.04 generic; do
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if [ "$v" = "generic" ] || os_exists "$v"; then
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OS_VARIANT="$v"; break
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fi
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done
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fi
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OS_VARIANT="${OS_VARIANT:-generic}"
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log "Using --os-variant $OS_VARIANT"
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[ "$OS_VARIANT" != "ubuntu22.04" ] && warn "Falling back to '$OS_VARIANT'. This only affects device/perf defaults; virtio + cloud image still works."
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# ---------------------------------------------
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step "STEP 3/6: PREPARING CLOUD IMAGE"
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# ---------------------------------------------
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if [ -f "$BASE_IMG" ]; then
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log "Base image already exists ($(du -h "$BASE_IMG" | cut -f1)), skipping download."
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else
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log "Downloading Ubuntu 22.04 cloud image (~600MB)..."
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log "URL: $IMG_URL"
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wget -q --show-progress -O "$BASE_IMG" "$IMG_URL"
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log "Download complete: $(du -h "$BASE_IMG" | cut -f1)"
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fi
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log "Base image info:"
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qemu-img info "$BASE_IMG" | sed 's/^/ /'
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# ---------------------------------------------
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step "STEP 4/6: CREATING DISK AND CLOUD-INIT"
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# ---------------------------------------------
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log "Creating ${DISK_SIZE} overlay disk for the VM..."
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rm -f "$VM_DISK"
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qemu-img create -f qcow2 -F qcow2 -b "$BASE_IMG" "$VM_DISK" "$DISK_SIZE" >/dev/null
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log "Disk created: $VM_DISK"
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log "Generating password hash for root..."
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HASH=$(mkpasswd -m sha-512 "$PASSWORD")
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WORKDIR=$(mktemp -d)
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log "Temp directory: $WORKDIR"
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log "Writing user-data (enable root login, password auth)..."
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cat > "$WORKDIR/user-data" <<EOF
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#cloud-config
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hostname: ${VM_NAME}
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disable_root: false
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ssh_pwauth: true
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users:
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- name: root
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lock_passwd: false
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hashed_passwd: "${HASH}"
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shell: /bin/bash
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chpasswd:
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expire: false
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list: |
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root:${PASSWORD}
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runcmd:
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- sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config
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- sed -i 's/^#\?PasswordAuthentication.*/PasswordAuthentication yes/' /etc/ssh/sshd_config
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- systemctl restart ssh
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EOF
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log "Writing meta-data..."
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cat > "$WORKDIR/meta-data" <<EOF
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instance-id: ${VM_NAME}
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local-hostname: ${VM_NAME}
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EOF
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log "Building seed ISO..."
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cloud-localds "$SEED_ISO" "$WORKDIR/user-data" "$WORKDIR/meta-data"
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log "Created: $SEED_ISO"
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rm -rf "$WORKDIR"
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log "Temp directory cleaned up."
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# ---------------------------------------------
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step "STEP 5/6: CREATING AND BOOTING THE VM"
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# ---------------------------------------------
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if virsh dominfo "$VM_NAME" >/dev/null 2>&1; then
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warn "VM '$VM_NAME' already exists (possibly from a failed run). Removing it..."
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virsh destroy "$VM_NAME" 2>/dev/null || true
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virsh undefine "$VM_NAME" 2>/dev/null || true
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log "Old VM removed."
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fi
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log "Running virt-install with --os-variant $OS_VARIANT ..."
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virt-install \
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--name "$VM_NAME" \
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--memory "$RAM" \
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--vcpus "$VCPUS" \
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--cpu host-passthrough \
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--disk path="$VM_DISK",device=disk,bus=virtio \
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--disk path="$SEED_ISO",device=cdrom \
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--os-variant "$OS_VARIANT" \
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--network network=default,model=virtio \
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--graphics none \
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--console pty,target_type=serial \
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--import \
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--noautoconsole
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log "VM defined and started."
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virsh autostart "$VM_NAME" >/dev/null
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log "Autostart enabled for the VM."
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# ---------------------------------------------
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step "STEP 6/6: WAITING FOR BOOT AND IP"
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# ---------------------------------------------
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log "Waiting for cloud-init to finish and the VM to get an IP (up to 120s)..."
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IP=""
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for i in $(seq 1 24); do
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IP=$(virsh domifaddr "$VM_NAME" 2>/dev/null | awk '/ipv4/{split($4,a,"/"); print a[1]}')
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if [ -n "$IP" ]; then
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log "Got IP after $((i*5))s: $IP"
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break
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fi
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echo -e "${YELLOW} ... waiting ($((i*5))s/120s)${NC}"
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sleep 5
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done
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[ -z "$IP" ] && warn "No IP yet. Check later with: virsh domifaddr $VM_NAME"
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# ---------------------------------------------
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step "DONE"
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# ---------------------------------------------
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virsh dominfo "$VM_NAME" | sed 's/^/ /'
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echo
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log "VM Name : $VM_NAME"
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log "vCPU/RAM : ${VCPUS} / $((RAM/1024))GB"
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log "Disk : $VM_DISK ($DISK_SIZE)"
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log "OS variant : $OS_VARIANT"
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log "IP : ${IP:-<none>}"
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log "Login : root / $PASSWORD"
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echo
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log "Console : virsh console $VM_NAME (exit: Ctrl+])"
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[ -n "$IP" ] && log "SSH : ssh root@$IP"
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warn "Cloud-init may need another 30-60s to finish SSH configuration." |