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
|
{ config, lib, pkgs, ... }:
let
inherit (builtins)
isList isString replaceStrings ;
inherit (lib)
concatMapStringsSep concatStringsSep filter filterAttrs flatten foldAttrs
foldl hasPrefix imap mapAttrsToList mkOption ;
inherit (lib.types)
attrsOf path str submodule ;
explicit = filterAttrs (n: v: n != "_module" && v != null);
instances = explicit config.nixsap.apps.openldap;
users = mapAttrsToList (_: i: i.user) instances;
keyrings =
let
keyFiles = i: filter (hasPrefix config.nixsap.deployment.keyStore) i.apply;
ik = mapAttrsToList (_: i: {
"${i.user}" = [i."cn=config".olcTLSCertificateKeyFile] ++ keyFiles i;
} ) instances;
in foldAttrs (l: r: l ++ r) [] ik;
mkService = name: cfg:
let
uid = config.users.users.${cfg.user}.uid;
gid = config.users.groups.${cfg.user}.gid;
show = n: v:
if isList v then map (s: "${n}: ${toString s}") v
else "${n}: ${toString v}";
olc = let olcXX = filterAttrs (n: _: hasPrefix "olc" n) (explicit cfg."cn=config");
in flatten (mapAttrsToList show olcXX);
configInit = pkgs.writeText "openldap-${name}-cn=config.ldif" ''
dn: cn=config
objectClass: olcGlobal
cn: config
${concatStringsSep "\n" olc}
dn: cn=schema,cn=config
objectClass: olcSchemaConfig
cn: schema
# XXX: access rule of this DB are appended to each other DB, except {0}config (???).
dn: olcDatabase={-1}frontend,cn=config
objectClass: olcDatabaseConfig
objectClass: olcFrontendConfig
olcDatabase: {-1}frontend
olcAccess: {0}to * by dn.exact=gidNumber=${toString gid}+uidNumber=${toString uid},cn=peercred,cn=external,cn=auth manage by * break
dn: olcDatabase={0}config,cn=config
objectClass: olcDatabaseConfig
olcDatabase: {0}config
olcReadOnly: TRUE
olcAccess: {0}to * by dn.exact=gidNumber=${toString gid}+uidNumber=${toString uid},cn=peercred,cn=external,cn=auth read by * break
olcAccess: {1}to * by * none
${cfg."cn=config".ldif}
'';
slapdDir = "${cfg.home}/slapd.d";
socket = replaceStrings
[ " " "/" ]
[ "+" "%2F" ]
"${cfg.home}/${name}.sock";
# XXX: OpenLDAP starts as root for privileged ports. Capabilities set by systemd aren't reliable
# XXX: See for example https://github.com/systemd/systemd/issues/5000
start = pkgs.writeBashScriptBin "openldap-${name}" ''
set -euo pipefail
rm -rf -- '${slapdDir}'
mkdir -p '${slapdDir}'
# XXX: All `olcDbDirectory` must exist before slapd or slapadd run
# XXX: until http://www.openldap.org/lists/openldap-devel/200904/msg00015.html
while IFS= read -r d
do
if [[ "$d" == '${cfg.home}/'* ]]; then
if [ ! -d "$d" ]; then
mkdir -p -- "$d"
chmod -R u=rwX,g=rX,o= -- "$d"
chown -R '${cfg.user}:${cfg.user}' -- "$d"
fi
else
echo "Path '$d' is not under '${cfg.home}'" >&2
exit 1
fi
done < <(${pkgs.gnused}/bin/sed -rn '/^olcDbDirectory:/ s!^olcDbDirectory: *(.+) *$!\1!p' '${configInit}')
echo '>>>>> importing ${configInit} ...'
${cfg.package}/bin/slapadd -n 0 -v -F '${slapdDir}' \
${concatMapStringsSep " " (o: "-d ${o}") cfg.debugLevel} \
-l ${configInit}
chmod -R u=rX,g=rX,o= '${slapdDir}'
chown -R '${cfg.user}:${cfg.user}' '${slapdDir}'
echo '<<<<< imported ${configInit}'
exec ${cfg.package}/libexec/slapd \
-n 'openldap-${name}' \
-u '${cfg.user}' \
-g '${cfg.user}' \
-h 'ldapi://${socket} ${cfg.urlList}' \
${concatMapStringsSep " " (o: "-d ${o}") cfg.debugLevel} \
-F '${slapdDir}'
'';
ldifs = imap (i: f:
if hasPrefix "/" f then "'${f}'"
else pkgs.writeText "openldap-${name}.${toString i}.ldif" f
) cfg.apply;
apply = pkgs.writeBashScriptBin "openldap-${name}-apply" ''
set -euo pipefail
while ! ${cfg.package}/bin/ldapsearch \
-LLL -Y EXTERNAL \
-H 'ldapi://${socket}' \
-b 'olcDatabase={0}config,cn=config' dn \
| ${pkgs.gnugrep}/bin/grep -qF 'olcDatabase={0}config,cn=config'
do
sleep 1s
done
exec ${pkgs.ldapply}/bin/ldapply \
-H 'ldapi://${socket}' \
${toString ldifs}
'';
in {
"openldap-${name}" = {
description = "OpenLDAP server (${name})";
wantedBy = [ "multi-user.target" ];
after = [ "keys.target" "network.target" "local-fs.target" ];
preStart = ''
mkdir -p -- '${cfg.home}'
find '${cfg.home}' -not -type l \( \
-not -user '${cfg.user}' \
-or -not -group '${cfg.user}' \
-or \( -type d -not -perm -u=wrx,g=rx \) \
-or \( -type f -not -perm -u=rw,g=r \) \
\) \
-exec chown -c -- '${cfg.user}:${cfg.user}' {} + \
-exec chmod -c -- u=rwX,g=rX,o= {} +
'';
unitConfig = {
# XXX OpenLDAP can be running long before fail:
StartLimitBurst = 3;
StartLimitIntervalSec = 300;
};
serviceConfig = {
ExecStart = "${start}/bin/openldap-${name}";
Restart = "always";
TimeoutSec = 60;
};
};
"openldap-${name}-apply" = {
description = "OpenLDAP server (${name}) data update";
wantedBy = [ "multi-user.target" ];
after = [ "openldap-${name}.service" ];
serviceConfig = {
ExecStart = "${apply}/bin/openldap-${name}-apply";
Type = "oneshot";
RemainAfterExit = true;
TimeoutSec = 60;
User = cfg.user;
};
};
};
in {
options.nixsap.apps.openldap = mkOption {
description = "OpenLDAP instances";
default = {};
type = attrsOf (submodule (import ./instance.nix pkgs));
};
config = {
nixsap.deployment.keyrings = keyrings;
nixsap.system.users.daemons = users;
systemd.services = foldl (a: b: a//b) {} (mapAttrsToList mkService instances);
};
}
|
