douai: Add backup scripts.

Modify slightly scripts from hydro66

douai/backup

+#!/bin/sh
+set -e
+
+h=douai-capri-`printf %03u $1`
+ip=192.168.46.$((50+$1))
+
+mkdir -p $h
+cd $h
+
+SSH='ssh -o BatchMode=yes -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
+R=/re6stnet.tar.xz
+O=/etc-opt.tar.xz
+$SSH $ip "set -e; umask 077; cd /etc; tar -caf $R re6stnet; tar -caf $O opt"
+rsync -e "$SSH" -av $ip:$R $ip:$O $ip:/opt/slapos/slapos.xml $ip:/etc/network/interfaces .
+
+sed -ri '/^auto ens1$/,$!d; s/(dns-nameservers).*/\1 80.80.80.80 80.80.81.81/' interfaces

douai/pxe

+#!/usr/bin/python3
+# apt install dnsmasq-base python3-bottle python3-gevent
+import argparse, os, signal, subprocess, sys
+from bottle import default_app, route, static_file
+from gevent import pywsgi
+
+from ctypes import CDLL, util as ctypes_util, get_errno, c_int, c_long
+libc = CDLL(ctypes_util.find_library('c'), use_errno=True)
+
+class Prctl(object):
+
+    def __init__(self, option, nargs):
+        self.option = option
+        self.args0 = (0,) * (4 - nargs)
+
+    def __call__(self, *args):
+        try:
+            prctl = self._prctl
+        except AttributeError:
+            prctl = self._prctl = libc.prctl
+            prctl.argtypes = c_int, c_long, c_long, c_long, c_long
+        r = prctl(self.option, *(args + self.args0))
+        if r == -1:
+            e = get_errno()
+            raise OSError(e, os.strerror(e))
+        return r
+
+PR_SET_PDEATHSIG = Prctl(1, 1)
+
+def killIfParentDies(ppid=os.getpid()):
+    PR_SET_PDEATHSIG(signal.SIGTERM)
+    if os.getppid() != ppid: # check race
+        sys.exit(1)
+
+CWD = os.getcwd()
+
+@route('/<p:re:.+/.+>')
+def static(p):
+    return static_file(p, root=CWD)
+
+def main():
+    parser = argparse.ArgumentParser()
+    _ = parser.add_argument
+    _('-p', '--port', type=int, default=69)
+    _('host')
+    _('dnsmasq', nargs=argparse.REMAINDER)
+    args = parser.parse_args()
+
+    host = args.host
+    iface = subprocess.check_output(('ip', '-o', 'address', 'show', 'to', host),
+                                    universal_newlines=True).split()[1]
+    cmd = ['dnsmasq', '-d', '--enable-tftp', '--tftp-root=' + CWD,
+           '--interface=' + iface, '--listen-address=' + host]
+    cmd += args.dnsmasq
+    subprocess.Popen(cmd, preexec_fn=killIfParentDies)
+
+    try:
+        pywsgi.WSGIServer((host, args.port), default_app()).serve_forever()
+    except KeyboardInterrupt:
+        pass
+
+
+if __name__ == '__main__':
+    sys.exit(main())

douai/reboot

+#!/bin/sh
+set -e
+
+cd douai-capri-`printf %03u $1`
+ip=10.0.45.$((50+$1))
+
+SSH='ssh -o BatchMode=yes -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
+
+$SSH $ip reboot

douai/restore

+#!/bin/sh
+set -e
+
+h=douai-capri-`printf %03u $1`
+ip=192.168.46.$((50+$1))
+
+cd $h
+
+SSH='ssh -o BatchMode=yes -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
+rsync -e "$SSH" -av etc-opt.tar.xz re6stnet.tar.xz slapos.xml $ip:
+$SSH $ip 'set -e; systemctl stop cron; mkdir /opt/slapos; mv slapos.xml /opt/slapos; cd /etc; for x in ~/etc-opt.tar.xz ~/re6stnet.tar.xz; do tar -xaf $x; rm $x; done; cd; wget https://deploy.erp5.net/vifib-base; bash vifib-base; cd /etc/opt/slapos/ssl/partition_pki; for x in *; do y=${x%.*}; y=${y#slappart}; [ "$y" = "*" ] || chown slapuser$y: "$x"; done'
+rsync -e "$SSH" -a /opt/slapgrid/f8b3d5ce4f68c34837520c8843c6b2fd $ip:/opt/slapgrid/
+$SSH $ip systemctl start cron

douai/server

+#!/bin/sh
+exec ./pxe 192.168.46.50 --port=0 --log-dhcp \
+  --dhcp-range=192.168.46.200,192.168.46.239,255.255.255.0,infinite \
+  --dhcp-option=option:router,192.168.46.1 \
+  --dhcp-option=option:dns-server,80.80.80.80,80.80.81.81 \
+  --dhcp-boot=debian-installer/amd64/grubx64.efi

douai/stop

+#!/bin/sh
+set -e
+
+cd douai-capri-`printf %03u $1`
+ip=10.0.45.$((50+$1))
+
+SSH='ssh -o BatchMode=yes -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
+
+$SSH $ip 'set -e; systemctl stop cron; set -- `pgrep -f /usr/sbin/CRON`; x=$*; x=${x// /,}; while pgrep -f "/opt/slapos/bin/slapos node instance" -P $x; do sleep 1; done >/dev/null; slapos node supervisorctl shutdown; while [ "`lsof +d /srv/slapgrid`" ]; do sleep 1; done'