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{ 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
'';
}
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