187 lines
4.7 KiB
Nix
187 lines
4.7 KiB
Nix
{ config, pkgs, ... }:
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with pkgs.lib;
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let
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cfg = config.services.mysql;
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mysql = cfg.package;
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pidFile = "${cfg.pidDir}/mysqld.pid";
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mysqldOptions =
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"--user=${cfg.user} --datadir=${cfg.dataDir} " +
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"--log-error=${cfg.logError} --pid-file=${pidFile}";
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in
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{
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###### interface
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options = {
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services.mysql = {
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enable = mkOption {
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default = false;
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description = "
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Whether to enable the MySQL server.
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";
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};
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package = mkOption {
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default = pkgs.mysql;
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description = "
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Which MySQL derivation to use.
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";
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};
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port = mkOption {
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default = "3306";
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description = "Port of MySQL";
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};
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user = mkOption {
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default = "mysql";
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description = "User account under which MySQL runs";
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};
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dataDir = mkOption {
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default = "/var/mysql"; # !!! should be /var/db/mysql
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description = "Location where MySQL stores its table files";
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};
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logError = mkOption {
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default = "/var/log/mysql_err.log";
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description = "Location of the MySQL error logfile";
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};
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pidDir = mkOption {
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default = "/var/run/mysql";
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description = "Location of the file which stores the PID of the MySQL server";
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};
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initialDatabases = mkOption {
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default = [];
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description = "List of database names and their initial schemas that should be used to create databases on the first startup of MySQL";
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example = [
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{ name = "foodatabase"; schema = ./foodatabase.sql; }
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{ name = "bardatabase"; schema = ./bardatabase.sql; }
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];
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};
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initialScript = mkOption {
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default = null;
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description = "A file containing SQL statements to be executed on the first startup. Can be used for granting certain permissions on the database";
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};
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rootPassword = mkOption {
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default = null;
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description = "Path to a file containing the root password, modified on the first startup. Not specifying a root password will leave the root password empty.";
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};
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};
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};
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###### implementation
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config = mkIf config.services.mysql.enable {
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users.extraUsers = singleton
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{ name = "mysql";
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description = "MySQL server user";
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};
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environment.systemPackages = [mysql];
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jobs.mysql =
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{ description = "MySQL server";
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startOn = "filesystem";
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preStart =
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''
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if ! test -e ${cfg.dataDir}/mysql; then
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mkdir -m 0700 -p ${cfg.dataDir}
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chown -R ${cfg.user} ${cfg.dataDir}
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${mysql}/bin/mysql_install_db ${mysqldOptions}
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touch /tmp/mysql_init
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fi
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mkdir -m 0700 -p ${cfg.pidDir}
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chown -R ${cfg.user} ${cfg.pidDir}
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'';
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exec = "${mysql}/libexec/mysqld ${mysqldOptions}";
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postStart =
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''
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# Wait until the MySQL server is available for use
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count=0
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while [ ! -e /tmp/mysql.sock ]
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do
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if [ $count -eq 30 ]
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then
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echo "Tried 30 times, giving up..."
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exit 1
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fi
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echo "MySQL daemon not yet started. Waiting for 1 second..."
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count=$((count++))
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sleep 1
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done
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if [ -f /tmp/mysql_init ]
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then
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# Create initial databases
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${concatMapStrings (database:
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''
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if ! test -e "${cfg.dataDir}/${database.name}"; then
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echo "Creating initial database: ${database.name}"
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( echo "create database ${database.name};"
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echo "use ${database.name};"
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if [ -f "${database.schema}" ]
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then
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cat ${database.schema}
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elif [ -d "${database.schema}" ]
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then
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cat ${database.schema}/mysql-databases/*.sql
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fi
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) | ${mysql}/bin/mysql -u root -N
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fi
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'') cfg.initialDatabases}
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# Execute initial script
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${optionalString (cfg.initialScript != null)
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''
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cat ${cfg.initialScript} | ${mysql}/bin/mysql -u root -N
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''}
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# Change root password
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${optionalString (cfg.rootPassword != null)
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''
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( echo "use mysql;"
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echo "update user set Password=password('$(cat ${cfg.rootPassword})') where User='root';"
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echo "flush privileges;"
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) | ${mysql}/bin/mysql -u root -N
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''}
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rm /tmp/mysql_init
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fi
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'';
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# !!! Need a postStart script to wait until mysqld is ready to
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# accept connections.
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extraConfig = "kill timeout 60";
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};
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};
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}
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