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
|
{ config, pkgs, lib, ports, name, secrets, ... }:
{
# ssh-keyscan eldiron | nix-shell -p ssh-to-age --run ssh-to-age
secrets.ageKeys = [ "age1dxr5lhvtnjssfaqpnf6qx80h8gfwkxg3tdf35m6n9wljmk7wadfs3kmahj" ];
boot = {
kernelModules = [ "kvm-intel" ];
blacklistedKernelModules = [ "nvidiafb" ];
loader.timeout = 1;
loader.grub.devices = [ "/dev/sda" "/dev/sdc" ];
kernel.sysctl = {
# https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
"net.ipv4.tcp_sack" = 0;
};
supportedFilesystems = [ "zfs" ];
kernelParams = ["zfs.zfs_arc_max=6442450944"];
kernelPackages = config.boot.zfs.package.latestCompatibleLinuxPackages;
initrd.availableKernelModules = [ "ahci" "sd_mod" ];
initrd.secrets = {
"/boot/pass.key" = "/boot/pass.key";
};
};
services.udev.extraRules = ''
ACTION=="add", SUBSYSTEM=="net", ATTR{address}=="c8:60:00:56:a0:88", NAME="eth0"
'';
nix.settings.max-jobs = 8;
nixpkgs.config.permittedInsecurePackages = [
"python-2.7.18.6" # for nagios-cli
"nodejs-16.20.2" # for landing page building
];
nixpkgs.overlays = builtins.attrValues ports.overlays;
powerManagement.cpuFreqGovernor = "powersave";
security.acme.certs."${name}".postRun = builtins.concatStringsSep "\n" [
(lib.optionalString config.services.websites.env.production.enable "/run/current-system/sw/bin/machinectl shell httpd-production /usr/bin/env systemctl reload httpd.service")
(lib.optionalString config.services.websites.env.integration.enable "/run/current-system/sw/bin/machinectl shell httpd-integration /usr/bin/env systemctl reload httpd.service")
];
fileSystems = {
# pools:
# zpool: ashift=12
# zfast: ashift=12
# zfs:
# zpool/: acltype=posixacl ; xattr=sa ; atime=off ; mountpoint=legacy
# zpool/root: encryption=on ; keyformat=passphrase ; keylocation=file:///boot/pass.key
# zpool/root/var: atime=on
# zfast/: acltype=posixacl ; xattr=sa ; atime=off ; mountpoint=legacy
# zfast/root: encryption=on ; keyformat=passphrase ; keylocation=file:///boot/pass.key
# zfast/root/etc: ø
# zfast/root/nix: ø
# zfast/root/tmp: async=disabled
# zfast/root/var: atime=on
# zfast/root/var/lib: ø
# zfast/root/var/lib/mysql: logbias=throughput ; atime=off ; primarycache=metadata
# zfast/root/var/lib/postgresql: recordsize=8K ; atime=off ; logbias=throughput
# zfast/root/var/lib/postgresql/11.0: ø
# zfast/root/var/lib/postgresql/11.0/pg_wal: ø
"/" = { fsType = "zfs"; device = "zpool/root"; };
"/boot" = { fsType = "ext4"; device = "/dev/disk/by-uuid/e6bb18fb-ff56-4b5f-ae9f-e60d40dc0622"; };
"/etc" = { fsType = "zfs"; device = "zpool/root/etc"; };
"/nix" = { fsType = "zfs"; device = "zfast/root/nix"; };
"/tmp" = { fsType = "zfs"; device = "zfast/root/tmp"; };
"/var" = { fsType = "zfs"; device = "zpool/root/var"; };
"/var/lib/mysql" = { fsType = "zfs"; device = "zfast/root/var/lib/mysql"; };
"/var/lib/postgresql" = { fsType = "zfs"; device = "zfast/root/var/lib/postgresql"; };
"/var/lib/postgresql/11.0" = { fsType = "zfs"; device = "zfast/root/var/lib/postgresql/11.0"; };
"/var/lib/postgresql/11.0/pg_wal" = { fsType = "zfs"; device = "zfast/root/var/lib/postgresql/11.0/pg_wal"; };
};
swapDevices = [ { label = "swap1"; } { label = "swap2"; } ];
hardware.enableRedistributableFirmware = true;
services.zfs = {
autoScrub = {
enable = false;
};
};
networking = {
hostId = "8262ca33"; # generated with head -c4 /dev/urandom | od -A none -t x4
firewall.enable = true;
firewall.allowedTCPPorts = [ config.myEnv.ports.zrepl_flony ];
# FIXME: on next reboot, remove the /27 and the localCommands
interfaces."eth0".ipv4.addresses = pkgs.lib.flatten (pkgs.lib.attrsets.mapAttrsToList
(n: ips: map (ip: { address = ip; prefixLength = 32; }) (ips.ip4 or []))
(pkgs.lib.attrsets.filterAttrs (n: v: n != "main") config.hostEnv.ips))
++ [ { address = lib.head config.hostEnv.ips.main.ip4; prefixLength = 27; } ];
interfaces."eth0".ipv6.addresses = pkgs.lib.flatten (pkgs.lib.attrsets.mapAttrsToList
(n: ips: map (ip: { address = ip; prefixLength = (if n == "main" && ip == pkgs.lib.head ips.ip6 then 64 else 128); }) (ips.ip6 or []))
config.hostEnv.ips);
defaultGateway = "176.9.151.65";
localCommands = ''
# FIXME: Those commands were added by nixops and may not be
# actually needed
ip -6 addr add '2a01:4f8:160:3445::/64' dev 'eth0' || true
ip -4 route change '176.9.151.64/27' via '176.9.151.65' dev 'eth0' || true
ip -6 route add default via 'fe80::1' dev eth0 || true
'';
nameservers = [
"213.133.98.98"
"213.133.99.99"
"213.133.100.100"
"2a01:4f8:0:a0a1::add:1010"
"2a01:4f8:0:a102::add:9999"
"2a01:4f8:0:a111::add:9898"
];
};
imports = [
secrets.nixosModules.users-config-eldiron
./databases
./databases/mariadb.nix
./databases/openldap
./databases/postgresql.nix
./databases/redis.nix
./monitoring.nix
./ejabberd
./buildbot
./coturn.nix
./dns.nix
./duply_backup.nix
./gemini
./gitolite
./mail
./websites
./webstats
./irc.nix
./pub
./tasks
./ftp.nix
./mpd.nix
./vpn
];
myServices.buildbot.enable = true;
myServices.databases.enable = true;
myServices.gitolite.enable = true;
myServices.monitoring.enable = true;
myServices.irc.enable = true;
myServices.pub.enable = true;
myServices.tasks.enable = true;
myServices.mpd.enable = true;
myServices.dns.enable = true;
myServices.websites.enable = true;
myServices.gemini.enable = true;
myServices.mail.enable = true;
myServices.ejabberd.enable = true;
myServices.vpn.enable = true;
myServices.ftp.enable = true;
myServices.chatonsProperties.hostings.infogerance = {
file.datetime = "2022-08-27T18:50:00";
hosting = {
name = "Infogérance";
description = "Administration de serveurs";
website = "https://www.immae.eu/";
logo = "https://assets.immae.eu/logo.jpg";
type = "HOSTEDSERVER";
status.level = "OK";
status.description = "OK";
registration.load = "OPEN";
install.type = "PACKAGE";
};
};
secrets.keys = {
"ldap/pam_pgsql" = {
user = "root";
group = "root";
permissions = "0400";
text = ''
database = immae
user = immae_auth_read
password = {{ .postgresql.immae_auth_read }}
table = ldap_users
user_column = login
pw_type = function
auth_query = SELECT ((mechanism = 'SSHA' AND password = encode(digest( %p || salt, 'sha1'), 'hex')) OR (mechanism = 'PLAIN' AND password = %p)) FROM ldap_users WHERE login = %u OR login || '@' || realm = %u
#pwd_query = WITH newsalt as (select gen_random_bytes(4)) UPDATE ldap_users SET password = encode(digest( %p || (SELECT * FROM newsalt), 'sha1'), 'hex'), salt = (SELECT * FROM newsalt), mechanism = 'SSHA' WHERE login = %u OR login || '@' || realm = %u
'';
};
"zrepl_backup/identity" = {
user = "root";
group = "root";
permissions = "0400";
text = config.myEnv.zrepl_backup.ssh_key.private;
};
"zrepl/${name}.key" = {
permissions = "0400";
text = config.myEnv.zrepl_backup.certs."${name}".key;
user = "root";
group = "root";
};
} // builtins.listToAttrs (map (x: lib.attrsets.nameValuePair "zrepl/certificates/${x}.crt" {
permissions = "0400";
text = config.myEnv.zrepl_backup.certs."${x}".certificate;
user = "root";
group = "root";
}) (builtins.attrNames config.myEnv.zrepl_backup.certs));
programs.ssh.knownHosts.dilion = {
extraHostNames = ["dilion.immae.eu"];
publicKey = config.myEnv.servers.dilion.hostKey;
};
services.cron = {
enable = true;
mailto = "cron@immae.eu";
systemCronJobs = [
''
0 0 * * * root journalctl -q --since="25 hours ago" -u postfix -t postfix/smtpd -g "immae.eu.*Recipient address rejected"
# Need a way to blacklist properly
# 0 0 * * * root journalctl -q --since="25 hours ago" -u postfix -t postfix/smtpd -g "NOQUEUE:"
0 0 * * * root journalctl -q --since="25 hours ago" -u postfix -t postfix/smtp -g "status=bounced"
''
];
};
environment.systemPackages = [ pkgs.bindfs ];
environment.etc."mdadm.conf" = {
enable = true;
mode = "0644";
user = "root";
text = "MAILADDR ${config.myEnv.monitoring.email}";
};
systemd.services.zrepl.path = [ pkgs.openssh ];
services.zrepl = {
enable = true;
settings = {
jobs = [
{
type = "push";
# must not change
name = "backup-to-dilion";
filesystems."zpool/root" = true;
filesystems."zpool/root/etc" = true;
filesystems."zpool/root/var<" = true;
connect = {
address = "dilion.immae.eu:19000";
type = "tls";
server_cn = "dilion";
ca = config.secrets.fullPaths."zrepl/certificates/dilion.crt";
cert = config.secrets.fullPaths."zrepl/certificates/eldiron.crt";
key = config.secrets.fullPaths."zrepl/eldiron.key";
};
snapshotting = {
type = "periodic";
prefix = "zrepl_";
interval = "1h";
# hooks = [
# {
# type = "mysql-lock-tables";
# dsn = "${config.myEnv.zrepl_backup.mysql.user}:${config.myEnv.zrepl_backup.mysql.password}@tcp(localhost)/";
# filesystems."zpool/root/var" = true;
# }
# {
# type = "command";
# path = pkgs.writeScript "redis-dump" ''
# #!${pkgs.stdenv.shell}
# ${pkgs.redis}/bin/redis-cli bgsave
# '';
# err_is_fatal = false;
# filesystems."zpool/root/var" = true;
# }
# ];
};
send.encrypted = true;
pruning.keep_sender = [
{ type = "regex"; regex = "^manual_.*"; }
{ type = "grid"; grid = "24x1h | 7x1d | 4x7d | 6x30d"; regex = "^zrepl_.*"; }
];
pruning.keep_receiver = [
{ type = "regex"; regex = "^manual_.*"; }
{ type = "grid"; grid = "6x4h | 7x1d | 4x7d | 6x30d"; regex = "^zrepl_.*"; }
];
}
{
type = "source";
# must not change
name = "backup-to-wd-zpool";
serve.type = "tls";
serve.listen = ":${builtins.toString config.myEnv.ports.zrepl_flony}";
serve.ca = config.secrets.fullPaths."zrepl/certificates/flony.crt";
serve.cert = config.secrets.fullPaths."zrepl/certificates/eldiron.crt";
serve.key = config.secrets.fullPaths."zrepl/eldiron.key";
serve.client_cns = [ "flony" ];
filesystems."zpool/root" = true;
filesystems."zpool/root/etc" = true;
filesystems."zpool/root/var<" = true;
filesystems."zfast/root/var<" = true;
send.encrypted = true;
snapshotting.type = "manual";
}
];
};
};
environment.etc."fail2ban/filter.d/postgresql.conf".text = ''
[Definition]
failregex = <HOST> \S+ FATAL: password authentication failed for user .+$
<HOST> \S+ FATAL: PAM authentication failed for user.+$
<HOST> \S+ FATAL: no pg_hba.conf entry for host.+$
'';
environment.etc."fail2ban/filter.d/mysqld-auth.local".text = ''
[Definition]
_daemon = mysql[-\w]*
'';
services.fail2ban.jails.dovecot = ''
enabled = true
'';
services.fail2ban.jails.postfix-sasl = ''
enabled = true
'';
services.fail2ban.jails.proftpd = ''
enabled = true
'';
services.fail2ban.jails.postgresql = ''
enabled = true
port = 5432
logpath = %(syslog_daemon)s
backend = %(default_backend)s
journalmatch = _SYSTEMD_UNIT=postgresql.service + _COMM=postgres
'';
services.fail2ban.jails.mysqld-auth = ''
enabled = true
journalmatch = _SYSTEMD_UNIT=mysql.service + _COMM=mysqld
'';
# This value determines the NixOS release with which your system is
# to be compatible, in order to avoid breaking some software such as
# database servers. You should change this only after NixOS release
# notes say you should.
# https://nixos.org/nixos/manual/release-notes.html
system.stateVersion = "23.05"; # Did you read the comment?
security.pam.services.ldap.text = ''
# Authentication from ldap for pgsql
auth required ${pkgs.pam_pgsql}/lib/security/pam_pgsql.so config_file=/var/secrets/ldap/pam_pgsql
account required ${pkgs.pam_pgsql}/lib/security/pam_pgsql.so config_file=/var/secrets/ldap/pam_pgsql
'';
services.saslauthd = {
enable = true;
mechanism = "pam";
};
environment.etc."sasl2/slapd.conf".text = ''
mech_list: plain
pwcheck_method: saslauthd
saslauthd_path: /run/saslauthd/mux
'';
}
|
