test 2 different base images to compare behavior / performance

test-image

#!/bin/bash
## images were created with something like this:
## mv trusty-server-cloudimg-amd64-disk1.img img.dist
## qemu-img convert -O raw img.dist disk-patched.img
## qemu-img convert -O raw img.dist disk-unpatched.img
## sudo mount-image-callback -v disk-patched.img -- \
##   sh -c 'cp debs/* $MOUNTPOINT/tmp && 
##          LANG=C chroot $MOUNTPOINT sh -c "dpkg -i /tmp/*.deb" &&
##          rm $MOUNTPOINT/tmp/*.deb'

NUM_RUNS=${NUM_RUNS:-10}
LOG="out.log"
rm -f "$LOG"
i=0

copyout=(
   /var/log/boot.log
   /var/log/my-dmesg.log
   /var/log/cloud-init.log
   /var/log/cloud-init-output.log
)

cat > user-data <<EOF
#cloud-config
password: passw0rd
chpasswd: { expire: False }
ssh_pwauth: True
power_state:
 mode: poweroff
 message: "Bye Bye"
runcmd:
 - ['sh', '-c', 'dmesg > /var/log/my-dmesg.log']
EOF

cloud-localds seed.img user-data
perms="$(id -u):$(id -g)"

while i=$(($i+1)) && [ $i -le $NUM_RUNS ]; do
  echo "---- $(date) $i ----" >> "$LOG"
  for r in patched unpatched; do
    qemu-img create -f qcow2 -b disk-$r.img disk1.img
    slog=$(printf "serial-%s-%02d.log" "$r" "$i")
    blog=$(printf "boot-%s-%02d.log" "$r" "$i")
    pre=$(printf "files/%s-%02d/" "$r" "$i")
    mkdir -p "$pre"
    echo "---- $(date) $i $r ----" >> "$LOG"
    sstart=$SECONDS
    kvm -net nic -net user,hostfwd=tcp::2222-:22 \
       -drive file=disk1.img,if=virtio -drive file=seed.img,if=virtio \
       -serial "file:$slog" -vga none -nographic
    ret=$?
    echo "  $i $r: $ret [$(($SECONDS-$sstart))s]" >> "$LOG"
    sudo mount-image-callback disk1.img -- \
        sh -c 'd=$MOUNTPOINT;
               pre=$1; shift;
               perms="$1"; shift;
               for f in "$@"; do 
                 out="${pre}${f##*/}";
                 [ -e "$d/$f" ] && cp "$d/$f" "$out" ||
                     echo "NA" > "$out";
                 chown $perms "$out";
               done' -- "$pre" "$perms" "${copyout[@]}"
  done
done

echo "--- $(date) FINISHED ---" >> "$LOG"