hosts: Add loki1.p.b

_loki1.pyrocufflink.blue_ replaces _loki0.pyrocufflink.blue_.  The
former runs Fedora Linux and is managed by Ansible, while the latter ran
Fedora CoreOS and was managed by Ignition and _cfg_.

migration/loki0-to-loki1.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+# vim: set sw=4 ts=4 sts=4 et :
+
+set -e
+
+cleanup() {
+    eval $(ssh-agent -k)
+}
+
+trap cleanup INT TERM QUIT EXIT
+
+eval $(ssh-agent)
+sshca-cli user login
+ssh-add -K
+
+: || {
+ssh root@loki0.pyrocufflink.blue cat '>' .ssh/known_hosts <<EOF
+@cert-authority *.pyrocufflink.blue ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAII24CZGosLMTny0a2eDB6KOG47FhlwVkTEFQNAYzKV0t
+EOF
+
+ssh root@loki0.pyrocufflink.blue btrfs subvol snapshot -r /var /var/.snapshot
+
+ssh root@loki0.pyrocufflink.blue btrfs send /var/.snapshot \| ssh root@loki1.pyrocufflink.blue btrfs receive /var/lib/loki
+
+ssh root@loki0.pyrocufflink.blue systemctl stop loki
+ssh root@loki0.pyrocufflink.blue btrfs subvol snapshot -r /var /var/.snapshot2
+ssh root@loki0.pyrocufflink.blue btrfs send -p /var/.snapshot /var/.snapshot2 \| ssh root@loki1.pyrocufflink.blue btrfs receive /var/lib/loki
+}
+
+ssh root@loki1.pyrocufflink.blue systemctl stop loki
+ssh root@loki1.pyrocufflink.blue cd /var/lib/loki '&&' rm -rf rules chunks tsdb-shipper-active tsdb-shipper-cache wal compactor
+ssh root@loki1.pyrocufflink.blue cp -a --reflink=always /var/lib/loki/.snapshot2/lib/loki/. /var/lib/loki
+
+ssh root@loki1.pyrocufflink.blue systemctl start loki
+
+nsupdate -g <<EOF
+del loki.pyrocufflink.blue
+add loki.pyrocufflink.blue 300 A 172.30.0.14
+send
+EOF