summaryrefslogtreecommitdiffstats
path: root/mcp/scripts/lib.sh
blob: 6f3c4383cd1cc1d6e78373137ef24f34d0d9af48 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
#!/bin/bash -e
# shellcheck disable=SC2155,SC1001
##############################################################################
# Copyright (c) 2017 Mirantis Inc., Enea AB and others.
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
#
# Library of shell functions
#

function generate_ssh_key {
  local mcp_ssh_key=$(basename "${SSH_KEY}")
  local user=${USER}
  if [ -n "${SUDO_USER}" ] && [ "${SUDO_USER}" != 'root' ]; then
    user=${SUDO_USER}
  fi

  if [ -f "${SSH_KEY}" ]; then
    cp "${SSH_KEY}" .
    ssh-keygen -f "${mcp_ssh_key}" -y > "${mcp_ssh_key}.pub"
  fi

  [ -f "${mcp_ssh_key}" ] || ssh-keygen -f "${mcp_ssh_key}" -N ''
  sudo install -D -o "${user}" -m 0600 "${mcp_ssh_key}" "${SSH_KEY}"
}

function get_base_image {
  local base_image=$1
  local image_dir=$2

  mkdir -p "${image_dir}"
  wget --progress=dot:giga -P "${image_dir}" -N "${base_image}"
}

function __kernel_modules {
  # Load mandatory kernel modules: loop, nbd
  local image_dir=$1
  sudo modprobe loop
  if sudo modprobe nbd max_part=8 || sudo modprobe -f nbd max_part=8; then
    return 0
  fi
  # CentOS (or RHEL family in general) do not provide 'nbd' out of the box
  echo "[WARN] 'nbd' kernel module cannot be loaded!"
  if [ ! -e /etc/redhat-release ]; then
    echo "[ERROR] Non-RHEL system detected, aborting!"
    echo "[ERROR] Try building 'nbd' manually or install it from a 3rd party."
    exit 1
  fi

  # Best-effort attempt at building a non-maintaned kernel module
  local __baseurl
  local __subdir
  local __uname_r=$(uname -r)
  local __uname_m=$(uname -m)
  if [ "${__uname_m}" = 'x86_64' ]; then
    __baseurl='http://vault.centos.org/centos'
    __subdir='Source/SPackages'
    __srpm="kernel-${__uname_r%.${__uname_m}}.src.rpm"
  else
    __baseurl='http://vault.centos.org/altarch'
    __subdir="Source/${__uname_m}/Source/SPackages"
    # NOTE: fmt varies across releases (e.g. kernel-alt-4.11.0-44.el7a.src.rpm)
    __srpm="kernel-alt-${__uname_r%.${__uname_m}}.src.rpm"
  fi

  local __found='n'
  local __versions=$(curl -s "${__baseurl}/" | grep -Po 'href="\K7\.[\d\.]+')
  for ver in ${__versions}; do
    for comp in os updates; do
      local url="${__baseurl}/${ver}/${comp}/${__subdir}/${__srpm}"
      if wget "${url}" -O "${image_dir}/${__srpm}" > /dev/null 2>&1; then
        __found='y'; break 2
      fi
    done
  done

  if [ "${__found}" = 'n' ]; then
    echo "[ERROR] Can't find the linux kernel SRPM for: ${__uname_r}"
    echo "[ERROR] 'nbd' module cannot be built, aborting!"
    echo "[ERROR] Try 'yum upgrade' or building 'nbd' krn module manually ..."
    exit 1
  fi

  rpm -ivh "${image_dir}/${__srpm}" 2> /dev/null
  mkdir -p ~/rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS}
  # shellcheck disable=SC2016
  echo '%_topdir %(echo $HOME)/rpmbuild' > ~/.rpmmacros
  (
    cd ~/rpmbuild/SPECS
    rpmbuild -bp --nodeps --target="${__uname_m}" kernel*.spec
    cd ~/rpmbuild/BUILD/"${__srpm%.src.rpm}"/linux-*
    sed -i 's/^.*\(CONFIG_BLK_DEV_NBD\).*$/\1=m/g' .config
    # http://centosfaq.org/centos/nbd-does-not-compile-for-3100-514262el7x86_64
    if grep -Rq 'REQ_TYPE_DRV_PRIV' drivers/block; then
      sed -i 's/REQ_TYPE_SPECIAL/REQ_TYPE_DRV_PRIV/g' drivers/block/nbd.c
    fi
    gunzip -c "/boot/symvers-${__uname_r}.gz" > Module.symvers
    make prepare modules_prepare
    make M=drivers/block -j
    modinfo drivers/block/nbd.ko
    sudo mkdir -p "/lib/modules/${__uname_r}/extra/"
    sudo cp drivers/block/nbd.ko "/lib/modules/${__uname_r}/extra/"
  )
  sudo depmod -a
  sudo modprobe nbd max_part=8 || sudo modprobe -f nbd max_part=8
}

function mount_image {
  local image=$1
  local image_dir=$2
  OPNFV_MNT_DIR="${image_dir}/ubuntu"

  # Find free nbd, loop devices
  for dev in '/sys/class/block/nbd'*; do
    if [ "$(cat "${dev}/size")" = '0' ]; then
      OPNFV_NBD_DEV=/dev/$(basename "${dev}")
      break
    fi
  done
  OPNFV_LOOP_DEV=$(losetup -f)
  OPNFV_MAP_DEV=/dev/mapper/$(basename "${OPNFV_NBD_DEV}")p1
  export OPNFV_MNT_DIR OPNFV_LOOP_DEV
  [ -n "${OPNFV_NBD_DEV}" ] && [ -n "${OPNFV_LOOP_DEV}" ] || exit 1
  qemu-img resize "${image_dir}/${image}" 3G
  sudo qemu-nbd --connect="${OPNFV_NBD_DEV}" --aio=native --cache=none \
    "${image_dir}/${image}"
  sudo kpartx -av "${OPNFV_NBD_DEV}"
  sleep 5 # /dev/nbdNp1 takes some time to come up
  # Hardcode partition index to 1, unlikely to change for Ubuntu UCA image
  if sudo growpart "${OPNFV_NBD_DEV}" 1; then
    sudo kpartx -u "${OPNFV_NBD_DEV}"
    sudo e2fsck -pf "${OPNFV_MAP_DEV}"
    sudo resize2fs "${OPNFV_MAP_DEV}"
  fi
  # grub-update does not like /dev/nbd*, so use a loop device to work around it
  sudo losetup "${OPNFV_LOOP_DEV}" "${OPNFV_MAP_DEV}"
  mkdir -p "${OPNFV_MNT_DIR}"
  sudo mount "${OPNFV_LOOP_DEV}" "${OPNFV_MNT_DIR}"
  sudo mount -t proc proc "${OPNFV_MNT_DIR}/proc"
  sudo mount -t sysfs sys "${OPNFV_MNT_DIR}/sys"
  sudo mount -o bind /dev "${OPNFV_MNT_DIR}/dev"
  sudo mkdir -p "${OPNFV_MNT_DIR}/run/resolvconf"
  sudo cp /etc/resolv.conf "${OPNFV_MNT_DIR}/run/resolvconf"
  echo "GRUB_DISABLE_OS_PROBER=true" | \
    sudo tee -a "${OPNFV_MNT_DIR}/etc/default/grub"
  sudo sed -i -e 's/^\(GRUB_TIMEOUT\)=.*$/\1=1/g' -e 's/^GRUB_HIDDEN.*$//g' \
    "${OPNFV_MNT_DIR}/etc/default/grub"
}

function apt_repos_pkgs_image {
  local apt_key_urls=(${1//,/ })
  local all_repos=(${2//,/ })
  local pkgs_i=(${3//,/ })
  local pkgs_r=(${4//,/ })
  [ -n "${OPNFV_MNT_DIR}" ] || exit 1

  # APT keys
  if [ "${#apt_key_urls[@]}" -gt 0 ]; then
    for apt_key in "${apt_key_urls[@]}"; do
      sudo chroot "${OPNFV_MNT_DIR}" /bin/bash -c \
        "wget -qO - '${apt_key}' | apt-key add -"
    done
  fi
  # Additional repositories
  for repo_line in "${all_repos[@]}"; do
    # <repo_name>|<repo prio>|deb|[arch=<arch>]|<repo url>|<dist>|<repo comp>
    local repo=(${repo_line//|/ })
    [ "${#repo[@]}" -gt 5 ] || continue
    # NOTE: Names and formatting are compatible with Salt linux.system.repo
    cat <<-EOF | sudo tee "${OPNFV_MNT_DIR}/etc/apt/preferences.d/${repo[0]}"

		Package: *
		Pin: release a=${repo[-2]}
		Pin-Priority: ${repo[1]}

		EOF
    echo "${repo[@]:2}" | sudo tee \
      "${OPNFV_MNT_DIR}/etc/apt/sources.list.d/${repo[0]}.list"
  done
  # Install packages
  if [ "${#pkgs_i[@]}" -gt 0 ]; then
    sudo DEBIAN_FRONTEND="noninteractive" \
      chroot "${OPNFV_MNT_DIR}" apt-get update
    sudo DEBIAN_FRONTEND="noninteractive" FLASH_KERNEL_SKIP="true" \
      chroot "${OPNFV_MNT_DIR}" apt-get install -y "${pkgs_i[@]}"
  fi
  # Remove packages
  if [ "${#pkgs_r[@]}" -gt 0 ]; then
    sudo DEBIAN_FRONTEND="noninteractive" FLASH_KERNEL_SKIP="true" \
      chroot "${OPNFV_MNT_DIR}" apt-get purge -y "${pkgs_r[@]}"
  fi
  # Disable cloud-init metadata service datasource
  sudo mkdir -p "${OPNFV_MNT_DIR}/etc/cloud/cloud.cfg.d"
  echo "datasource_list: [ NoCloud, None ]" | sudo tee \
    "${OPNFV_MNT_DIR}/etc/cloud/cloud.cfg.d/95_real_datasources.cfg"
}

function cleanup_mounts {
  # Remove any mounts, loop and/or nbd devs created while patching base image
  if [ -n "${OPNFV_MNT_DIR}" ] && [ -d "${OPNFV_MNT_DIR}" ]; then
    if [ -f "${OPNFV_MNT_DIR}/boot/grub/grub.cfg" ]; then
      # Grub thinks it's running from a live CD
      sudo sed -i -e 's/^\s*set root=.*$//g' -e 's/^\s*loopback.*$//g' \
        "${OPNFV_MNT_DIR}/boot/grub/grub.cfg"
    fi
    sudo rm -f "${OPNFV_MNT_DIR}/run/resolvconf/resolv.conf"
    sync
    if mountpoint -q "${OPNFV_MNT_DIR}"; then
      sudo umount -l "${OPNFV_MNT_DIR}" || true
    fi
  fi
  if [ -n "${OPNFV_LOOP_DEV}" ] && \
    losetup "${OPNFV_LOOP_DEV}" 1>&2 > /dev/null; then
      sudo losetup -d "${OPNFV_LOOP_DEV}"
  fi
  if [ -n "${OPNFV_NBD_DEV}" ]; then
    sudo kpartx -d "${OPNFV_NBD_DEV}" || true
    sudo qemu-nbd -d "${OPNFV_NBD_DEV}" || true
  fi
}

function cleanup_uefi {
  # Clean up Ubuntu boot entry if cfg01, kvm nodes online from previous deploy
  local cmd_str="ssh ${SSH_OPTS} ${SSH_SALT}"
  [ ! "$(hostname)" = 'cfg01' ] || cmd_str='eval'
  ${cmd_str} "sudo salt -C 'kvm* or cmp*' cmd.run \
    \"which efibootmgr > /dev/null 2>&1 && \
    efibootmgr | grep -oP '(?<=Boot)[0-9]+(?=.*ubuntu)' | \
    xargs -I{} efibootmgr --delete-bootnum --bootnum {}; \
    rm -rf /boot/efi/*\"" || true
}

function cleanup_vms {
  # clean up existing nodes
  for node in $(virsh list --name | grep -P '\w{3}\d{2}'); do
    virsh destroy "${node}"
  done
  for node in $(virsh list --name --all | grep -P '\w{3}\d{2}'); do
    virsh domblklist "${node}" | awk '/^.da/ {print $2}' | \
      xargs --no-run-if-empty -I{} sudo rm -f {}
    virsh undefine "${node}" --remove-all-storage --nvram
  done
}

function prepare_vms {
  local base_image=$1; shift
  local image_dir=$1; shift
  local repos_pkgs_str=$1; shift # ^-sep list of repos, pkgs to install/rm
  local vnodes=("$@")
  local image=base_image_opnfv_fuel.img
  local vcp_image=${image%.*}_vcp.img
  local _o=${base_image/*\/}
  local _h=$(echo "${repos_pkgs_str}.$(md5sum "${image_dir}/${_o}")" | \
             md5sum | cut -c -8)
  local _tmp

  cleanup_uefi
  cleanup_vms
  get_base_image "${base_image}" "${image_dir}"
  IFS='^' read -r -a repos_pkgs <<< "${repos_pkgs_str}"

  echo "[INFO] Lookup cache / build patched base image for fingerprint: ${_h}"
  _tmp="${image%.*}.${_h}.img"
  if [ "${image_dir}/${_tmp}" -ef "${image_dir}/${image}" ]; then
    echo "[INFO] Patched base image found"
  else
    rm -f "${image_dir}/${image%.*}"*
    if [[ ! "${repos_pkgs_str}" =~ ^\^+$ ]]; then
      echo "[INFO] Patching base image ..."
      cp "${image_dir}/${_o}" "${image_dir}/${_tmp}"
      __kernel_modules "${image_dir}"
      mount_image "${_tmp}" "${image_dir}"
      apt_repos_pkgs_image "${repos_pkgs[@]:0:4}"
      cleanup_mounts
    else
      echo "[INFO] No patching required, using vanilla base image"
      ln -sf "${image_dir}/${_o}" "${image_dir}/${_tmp}"
    fi
    ln -sf "${image_dir}/${_tmp}" "${image_dir}/${image}"
  fi

  # Create config ISO and resize OS disk image for each foundation node VM
  for node in "${vnodes[@]}"; do
    if [[ "${node}" =~ ^(cfg01|mas01) ]]; then
      user_data='user-data.mcp.sh'
    else
      user_data='user-data.admin.sh'
    fi
    ./create-config-drive.sh -k "$(basename "${SSH_KEY}").pub" \
       -u "${user_data}" -h "${node}" "${image_dir}/mcp_${node}.iso"
    cp "${image_dir}/${image}" "${image_dir}/mcp_${node}.qcow2"
    qemu-img resize "${image_dir}/mcp_${node}.qcow2" 100G
  done

  # VCP VMs base image specific changes
  if [[ ! "${repos_pkgs_str}" =~ \^{3}$ ]] && [ -n "${repos_pkgs[*]:4}" ]; then
    echo "[INFO] Lookup cache / build patched VCP image for md5sum: ${_h}"
    _tmp="${vcp_image%.*}.${_h}.img"
    if [ "${image_dir}/${_tmp}" -ef "${image_dir}/${vcp_image}" ]; then
      echo "[INFO] Patched VCP image found"
    else
      echo "[INFO] Patching VCP image ..."
      cp "${image_dir}/${image}" "${image_dir}/${_tmp}"
      __kernel_modules "${image_dir}"
      mount_image "${_tmp}" "${image_dir}"
      apt_repos_pkgs_image "${repos_pkgs[@]:4:4}"
      cleanup_mounts
      ln -sf "${image_dir}/${_tmp}" "${image_dir}/${vcp_image}"
    fi
  fi
}

function create_networks {
  local vnode_networks=("$@")
  # create required networks, including constant "mcpcontrol"
  # FIXME(alav): since we renamed "pxe" to "mcpcontrol", we need to make sure
  # we delete the old "pxe" virtual network, or it would cause IP conflicts.
  for net in "pxe" "mcpcontrol" "${vnode_networks[@]}"; do
    if virsh net-info "${net}" >/dev/null 2>&1; then
      virsh net-destroy "${net}" || true
      virsh net-undefine "${net}"
    fi
    # in case of custom network, host should already have the bridge in place
    if [ -f "virsh_net/net_${net}.xml" ] && \
     [ ! -d "/sys/class/net/${net}/bridge" ]; then
      virsh net-define "virsh_net/net_${net}.xml"
      virsh net-autostart "${net}"
      virsh net-start "${net}"
    fi
  done
}

function create_vms {
  local image_dir=$1; shift
  # vnode data should be serialized with the following format:
  # '<name0>,<ram0>,<vcpu0>|<name1>,<ram1>,<vcpu1>[...]'
  IFS='|' read -r -a vnodes <<< "$1"; shift

  # AArch64: prepare arch specific arguments
  local virt_extra_args=""
  if [ "$(uname -i)" = "aarch64" ]; then
    # No Cirrus VGA on AArch64, use virtio instead
    virt_extra_args="$virt_extra_args --video=virtio"
  fi

  # create vms with specified options
  for serialized_vnode_data in "${vnodes[@]}"; do
    IFS=',' read -r -a vnode_data <<< "${serialized_vnode_data}"

    # prepare network args
    local vnode_networks=("$@")
    if [[ "${vnode_data[0]}" =~ ^(cfg01|mas01) ]]; then
      net_args=" --network network=mcpcontrol,model=virtio"
      # 3rd interface gets connected to PXE/Admin Bridge (cfg01, mas01)
      vnode_networks[2]="${vnode_networks[0]}"
    else
      net_args=" --network bridge=${vnode_networks[0]},model=virtio"
    fi
    for net in "${vnode_networks[@]:1}"; do
      net_args="${net_args} --network bridge=${net},model=virtio"
    done

    # shellcheck disable=SC2086
    virt-install --name "${vnode_data[0]}" \
    --ram "${vnode_data[1]}" --vcpus "${vnode_data[2]}" \
    --cpu host-passthrough --accelerate ${net_args} \
    --disk path="${image_dir}/mcp_${vnode_data[0]}.qcow2",format=qcow2,bus=virtio,cache=none,io=native \
    --os-type linux --os-variant none \
    --boot hd --vnc --console pty --autostart --noreboot \
    --disk path="${image_dir}/mcp_${vnode_data[0]}.iso",device=cdrom \
    --noautoconsole \
    ${virt_extra_args}
  done
}

function update_mcpcontrol_network {
  # set static ip address for salt master node, MaaS node
  local cmac=$(virsh domiflist cfg01 2>&1| awk '/mcpcontrol/ {print $5; exit}')
  local amac=$(virsh domiflist mas01 2>&1| awk '/mcpcontrol/ {print $5; exit}')
  virsh net-update "mcpcontrol" add ip-dhcp-host \
    "<host mac='${cmac}' name='cfg01' ip='${SALT_MASTER}'/>" --live --config
  [ -z "${amac}" ] || virsh net-update "mcpcontrol" add ip-dhcp-host \
    "<host mac='${amac}' name='mas01' ip='${MAAS_IP}'/>" --live --config
}

function start_vms {
  local vnodes=("$@")

  # start vms
  for node in "${vnodes[@]}"; do
    virsh start "${node}"
    sleep $((RANDOM%5+1))
  done
}

function check_connection {
  local total_attempts=60
  local sleep_time=5

  set +e
  echo '[INFO] Attempting to get into Salt master ...'

  # wait until ssh on Salt master is available
  # shellcheck disable=SC2034
  for attempt in $(seq "${total_attempts}"); do
    # shellcheck disable=SC2086
    ssh ${SSH_OPTS} "ubuntu@${SALT_MASTER}" uptime
    case $? in
      0) echo "${attempt}> Success"; break ;;
      *) echo "${attempt}/${total_attempts}> ssh server ain't ready yet, waiting for ${sleep_time} seconds ..." ;;
    esac
    sleep $sleep_time
  done
  set -e
}

function parse_yaml {
  local prefix=$2
  local s
  local w
  local fs
  s='[[:space:]]*'
  w='[a-zA-Z0-9_]*'
  fs="$(echo @|tr @ '\034')"
  sed -e 's|---||g' -ne "s|^\($s\)\($w\)$s:$s\"\(.*\)\"$s\$|\1$fs\2$fs\3|p" \
      -e "s|^\($s\)\($w\)$s[:-]$s\(.*\)$s\$|\1$fs\2$fs\3|p" "$1" |
  awk -F"$fs" '{
  indent = length($1)/2;
  vname[indent] = $2;
  for (i in vname) {if (i > indent) {delete vname[i]}}
      if (length($3) > 0) {
          vn=""; for (i=0; i<indent; i++) {vn=(vn)(vname[i])("_")}
          printf("%s%s%s=(\"%s\")\n", "'"$prefix"'",vn, $2, $3);
      }
  }' | sed 's/_=/+=/g'
}

function wait_for {
  # Execute in a subshell to prevent local variable override during recursion
  (
    local total_attempts=$1; shift
    local cmdstr=$*
    local sleep_time=10
    echo -e "\n[wait_for] Waiting for cmd to return success: ${cmdstr}"
    # shellcheck disable=SC2034
    for attempt in $(seq "${total_attempts}"); do
      echo "[wait_for] Attempt ${attempt}/${total_attempts%.*} for: ${cmdstr}"
      if [ "${total_attempts%.*}" = "${total_attempts}" ]; then
        # shellcheck disable=SC2015
        eval "${cmdstr}" && echo "[wait_for] OK: ${cmdstr}" && return 0 || true
      else
        !(eval "${cmdstr}" || echo __fuel_wf_failure__) |& tee /dev/stderr | \
          grep -Eq '(Not connected|No response|__fuel_wf_failure__)' && \
          echo "[wait_for] OK: ${cmdstr}" && return 0 || true
      fi
      sleep "${sleep_time}"
    done
    echo "[wait_for] ERROR: Failed after max attempts: ${cmdstr}"
    return 1
  )
}

function do_sysctl_cfg {
  local _conf='/etc/sysctl.d/99-opnfv-fuel-bridge.conf'
  # https://wiki.libvirt.org/page/Net.bridge.bridge-nf-call_and_sysctl.conf
  echo 'net.bridge.bridge-nf-call-arptables = 0' |& sudo tee "${_conf}"
  echo 'net.bridge.bridge-nf-call-iptables = 0'  |& sudo tee -a "${_conf}"
  echo 'net.bridge.bridge-nf-call-ip6tables = 0' |& sudo tee -a "${_conf}"
  sudo sysctl -q -p "${_conf}"
}

function get_nova_compute_pillar_data {
  local value=$(salt -C 'I@nova:compute and *01*' pillar.get _param:"${1}" --out yaml | cut -d ' ' -f2)
  if [ "${value}" != "''" ]; then
    echo "${value}"
  fi
}

function do_templates() {
  local git_repo_root=$1; shift
  local image_dir=$1; shift
  local target_lab=$1; shift
  local target_pod=$1; shift
  local lab_config_uri=$1; shift
  local scenario_dir=${1:-}

  RECLASS_CLUSTER_DIR=$(cd "${git_repo_root}/mcp/reclass/classes/cluster"; pwd)
  PHAROS_GEN_CFG="./pharos/config/utils/generate_config.py"
  PHAROS_INSTALLER_ADAPTER="./pharos/config/installers/fuel/pod_config.yml.j2"
  BASE_CONFIG_PDF="${lab_config_uri}/labs/${target_lab}/${target_pod}.yaml"
  BASE_CONFIG_IDF="${lab_config_uri}/labs/${target_lab}/idf-${target_pod}.yaml"
  LOCAL_PDF="${image_dir}/$(basename "${BASE_CONFIG_PDF}")"
  LOCAL_IDF="${image_dir}/$(basename "${BASE_CONFIG_IDF}")"
  LOCAL_PDF_RECLASS="${image_dir}/pod_config.yml"

  # Two-stage expansion, first stage handles pod_config and scenarios only
  if [ -n "${scenario_dir}" ]; then
    # Make sample PDF/IDF available via default lab-config (pharos submodule)
    ln -sf "$(readlink -f "../config/labs/local")" "./pharos/labs/"

    # Expand scenario file and main reclass input (pod_config.yaml) based on PDF
    if ! curl --create-dirs -o "${LOCAL_PDF}" "${BASE_CONFIG_PDF}"; then
      notify_e "[ERROR] Could not retrieve PDF (Pod Descriptor File)!"
    elif ! curl -o "${LOCAL_IDF}" "${BASE_CONFIG_IDF}"; then
      notify_e "[ERROR] Could not retrieve IDF (Installer Descriptor File)!"
    elif ! "${PHAROS_GEN_CFG}" -y "${LOCAL_PDF}" \
        -j "${PHAROS_INSTALLER_ADAPTER}" > "${LOCAL_PDF_RECLASS}"; then
      notify_e "[ERROR] Could not convert PDF+IDF to reclass model input!"
    fi
    template_dirs="${scenario_dir}"
    template_err_str='Could not convert j2 scenario definitions!'
  else
    # Expand reclass and virsh network templates based on PDF + IDF
    printenv | \
      awk '/^(SALT|MCP|MAAS|CLUSTER).*=/ { gsub(/=/,": "); print }' >> "${LOCAL_PDF}"
    template_dirs="${RECLASS_CLUSTER_DIR} virsh_net ./*j2"
    template_err_str='Could not convert PDF to network definitions!'
  fi
  # shellcheck disable=SC2086
  find ${template_dirs} -name '*.j2' | while read -r tp; do
    # Jinja2 import does not allow '..' directory traversal
    if ! "${PHAROS_GEN_CFG}" -y "${LOCAL_PDF}" -j "${tp}" > "${tp%.j2}"; then
      notify_e "[ERROR] ${template_err_str}"
    fi
  done
}