71 lines
2.2 KiB
Bash
71 lines
2.2 KiB
Bash
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#!/bin/bash
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# Bring up the lab network simulation: one isolated libvirt network per VLAN,
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# each with a single tiny Alpine VM offering SSH + a hello-world HTTP page.
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#
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# Idempotent: re-running only creates what is missing. Safe to run repeatedly.
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#
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# Usage: ./labsim-up.sh [vlan-id ...] (default: every VLAN in vlans.conf)
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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source "$SCRIPT_DIR/lib.sh"
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source "$SCRIPT_DIR/ovs.sh"
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require_tools
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[ -f "$BASE_IMAGE" ] || die "base image missing: $BASE_IMAGE (see README)"
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SSH_PUB="$(find_ssh_pubkey)"
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log "Using SSH key: ${SSH_PUB%% *} ...${SSH_PUB##* }"
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selected_vlans "$@"
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# --- switch fabric ------------------------------------------------------
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log "bringing up OVS fabric ($OVS_BR) with host legs per VLAN"
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ovs_up
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# --- VMs ------------------------------------------------------------------
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for entry in "${SELECTED[@]}"; do
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IFS=: read -r vid name prefix real <<<"$entry"
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vm="$(vm_name "$vid" "$name")"
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ip="${prefix}.10"
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if virsh_q dominfo "$vm" >/dev/null 2>&1; then
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state="$(virsh_q domstate "$vm" 2>/dev/null | head -1 | tr -d '\n')"
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if [ "$state" = "running" ]; then
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log "VM $vm already running ($ip)"
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continue
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fi
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log "VM $vm exists but is $state — starting"
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virsh_q start "$vm" >/dev/null
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continue
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fi
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log "creating VM $vm ($ip on vlan $vid/$name)"
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disk="$IMG_DIR/${vm}.qcow2"
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seed="$IMG_DIR/${vm}-seed.iso"
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# Copy-on-write overlay: each VM costs a few MB, not 176.
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sudo qemu-img create -q -f qcow2 -F qcow2 -b "$BASE_IMAGE" "$disk" "$VM_DISK" >/dev/null
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build_seed "$seed" "$vm" "$vid" "$name" "$prefix" "$ip" "$real" "$SSH_PUB"
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sudo virt-install \
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--connect "$LIBVIRT_URI" \
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--name "$vm" \
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--memory "$VM_MEM" --vcpus "$VM_CPUS" \
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--disk "path=$disk,format=qcow2,bus=virtio" \
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--disk "path=$seed,device=cdrom,readonly=on" \
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--network "network=$OVS_NET,portgroup=vlan${vid},model=virtio" \
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--os-variant alpinelinux3.18 \
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--graphics none --noautoconsole --import >/dev/null
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done
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echo
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log "waiting for VMs to answer on SSH + HTTP..."
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wait_ready
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echo
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status_table
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echo
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log "environment is UP. Tear down with: $SCRIPT_DIR/labsim-down.sh"
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