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1 | { lib, pkgs, config, ... }: | |
2 | let | |
3 | cfg = config.myServices.databases.mariadb; | |
4 | in { | |
5 | options.myServices.databases = { | |
6 | mariadb = { | |
7 | enable = lib.mkOption { | |
8 | default = false; | |
9 | example = true; | |
10 | description = "Whether to enable mariadb database"; | |
11 | type = lib.types.bool; | |
12 | }; | |
13 | package = lib.mkOption { | |
14 | type = lib.types.package; | |
15 | default = pkgs.mariadb; | |
16 | description = '' | |
17 | Mariadb package to use. | |
18 | ''; | |
19 | }; | |
20 | credentials = lib.mkOption { | |
21 | default = {}; | |
22 | description = "Credentials"; | |
23 | type = lib.types.attrsOf lib.types.str; | |
24 | }; | |
25 | ldapConfig = lib.mkOption { | |
26 | description = "LDAP configuration to allow PAM identification via LDAP"; | |
27 | type = lib.types.submodule { | |
28 | options = { | |
29 | host = lib.mkOption { type = lib.types.str; }; | |
30 | base = lib.mkOption { type = lib.types.str; }; | |
31 | dn = lib.mkOption { type = lib.types.str; }; | |
32 | password = lib.mkOption { type = lib.types.str; }; | |
33 | filter = lib.mkOption { type = lib.types.str; }; | |
34 | }; | |
35 | }; | |
36 | }; | |
37 | replicationLdapConfig = lib.mkOption { | |
38 | description = "LDAP configuration to allow replication"; | |
39 | type = lib.types.submodule { | |
40 | options = { | |
41 | host = lib.mkOption { type = lib.types.str; }; | |
42 | base = lib.mkOption { type = lib.types.str; }; | |
43 | dn = lib.mkOption { type = lib.types.str; }; | |
44 | password = lib.mkOption { type = lib.types.str; }; | |
45 | }; | |
46 | }; | |
47 | }; | |
48 | dataDir = lib.mkOption { | |
49 | type = lib.types.path; | |
50 | default = "/var/lib/mysql"; | |
51 | description = '' | |
52 | The directory where Mariadb stores its data. | |
53 | ''; | |
54 | }; | |
55 | # Output variables | |
56 | socketsDir = lib.mkOption { | |
57 | type = lib.types.path; | |
58 | default = "/run/mysqld"; | |
59 | description = '' | |
60 | The directory where Mariadb puts sockets. | |
61 | ''; | |
62 | }; | |
63 | sockets = lib.mkOption { | |
64 | type = lib.types.attrsOf lib.types.path; | |
65 | default = { | |
66 | mysqld = "${cfg.socketsDir}/mysqld.sock"; | |
67 | }; | |
68 | readOnly = true; | |
69 | description = '' | |
70 | Mariadb sockets | |
71 | ''; | |
72 | }; | |
73 | }; | |
74 | }; | |
75 | ||
76 | config = lib.mkIf cfg.enable { | |
77 | networking.firewall.allowedTCPPorts = [ 3306 ]; | |
78 | ||
79 | # for adminer, ssl is implemented with mysqli only, which is | |
80 | # currently disabled because it’s not compatible with pam. | |
81 | # Thus we need to generate two users for each 'remote': one remote | |
82 | # with SSL, and one localhost without SSL. | |
83 | # User identified by LDAP: | |
84 | # CREATE USER foo@% IDENTIFIED VIA pam USING 'mysql' REQUIRE SSL; | |
85 | # CREATE USER foo@localhost IDENTIFIED VIA pam USING 'mysql'; | |
86 | ||
87 | # To create a user (host) for replication: | |
88 | # CREATE USER 'host'@'%' IDENTIFIED VIA pam USING 'mysql_replication' REQUIRE SSL; | |
89 | # GRANT REPLICATION SLAVE, REPLICATION CLIENT, RELOAD, LOCK TABLES, SELECT, SHOW VIEW ON *.* TO 'host'@'%'; | |
90 | # (the lock/select grant permits to let the replication host handle | |
91 | # the initial fetch of the database) | |
92 | # % should be valid for both localhost (for cron dumps) and the origin host. | |
93 | services.mysql = { | |
94 | enable = true; | |
95 | package = cfg.package; | |
96 | dataDir = cfg.dataDir; | |
97 | extraOptions = '' | |
98 | ssl_ca = ${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt | |
99 | ssl_key = ${config.security.acme2.certs.mysql.directory}/key.pem | |
100 | ssl_cert = ${config.security.acme2.certs.mysql.directory}/fullchain.pem | |
101 | ||
102 | # for replication | |
103 | log-bin=mariadb-bin | |
104 | server-id=1 | |
105 | ||
106 | # this introduces a small delay before storing on disk, but | |
107 | # makes it order of magnitudes quicker | |
108 | innodb_flush_log_at_trx_commit = 0 | |
109 | ''; | |
110 | }; | |
111 | ||
112 | users.users.mysql.extraGroups = [ "keys" ]; | |
113 | security.acme2.certs."mysql" = config.myServices.databasesCerts // { | |
114 | user = "mysql"; | |
115 | group = "mysql"; | |
116 | plugins = [ "fullchain.pem" "key.pem" "account_key.json" "account_reg.json" ]; | |
117 | domain = "db-1.immae.eu"; | |
118 | postRun = '' | |
119 | systemctl restart mysql.service | |
120 | ''; | |
121 | }; | |
122 | ||
123 | secrets.keys = [ | |
124 | { | |
125 | dest = "mysql/mysqldump"; | |
126 | permissions = "0400"; | |
127 | user = "root"; | |
128 | group = "root"; | |
129 | text = '' | |
130 | [mysqldump] | |
131 | user = root | |
132 | password = ${cfg.credentials.root} | |
133 | ''; | |
134 | } | |
135 | { | |
136 | dest = "mysql/pam"; | |
137 | permissions = "0400"; | |
138 | user = "mysql"; | |
139 | group = "mysql"; | |
140 | text = with cfg.ldapConfig; '' | |
141 | host ${host} | |
142 | base ${base} | |
143 | binddn ${dn} | |
144 | bindpw ${password} | |
145 | pam_filter ${filter} | |
146 | ssl start_tls | |
147 | ''; | |
148 | } | |
149 | { | |
150 | dest = "mysql/pam_replication"; | |
151 | permissions = "0400"; | |
152 | user = "mysql"; | |
153 | group = "mysql"; | |
154 | text = with cfg.replicationLdapConfig; '' | |
155 | host ${host} | |
156 | base ${base} | |
157 | binddn ${dn} | |
158 | bindpw ${password} | |
159 | pam_login_attribute cn | |
160 | ssl start_tls | |
161 | ''; | |
162 | } | |
163 | ]; | |
164 | ||
165 | security.pam.services = let | |
166 | pam_ldap = "${pkgs.pam_ldap}/lib/security/pam_ldap.so"; | |
167 | in [ | |
168 | { | |
169 | name = "mysql"; | |
170 | text = '' | |
171 | # https://mariadb.com/kb/en/mariadb/pam-authentication-plugin/ | |
172 | auth required ${pam_ldap} config=${config.secrets.location}/mysql/pam | |
173 | account required ${pam_ldap} config=${config.secrets.location}/mysql/pam | |
174 | ''; | |
175 | } | |
176 | { | |
177 | name = "mysql_replication"; | |
178 | text = '' | |
179 | auth required ${pam_ldap} config=${config.secrets.location}/mysql/pam_replication | |
180 | account required ${pam_ldap} config=${config.secrets.location}/mysql/pam_replication | |
181 | ''; | |
182 | } | |
183 | ]; | |
184 | ||
185 | }; | |
186 | } |