nixpkgs/nixos/tests/mysql-replication.nix

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import ./make-test.nix ({ pkgs, ...} :
let
replicateUser = "replicate";
replicatePassword = "secret";
in
{
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name = "mysql-replication";
meta = with pkgs.stdenv.lib.maintainers; {
maintainers = [ eelco shlevy ];
};
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nodes = {
master =
{ pkgs, ... }:
{
services.mysql.enable = true;
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services.mysql.package = pkgs.mysql;
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services.mysql.replication.role = "master";
services.mysql.replication.slaveHost = "%";
services.mysql.replication.masterUser = replicateUser;
services.mysql.replication.masterPassword = replicatePassword;
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services.mysql.initialDatabases = [ { name = "testdb"; schema = ./testdb.sql; } ];
networking.firewall.allowedTCPPorts = [ 3306 ];
};
slave1 =
{ pkgs, nodes, ... }:
{
services.mysql.enable = true;
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services.mysql.package = pkgs.mysql;
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services.mysql.replication.role = "slave";
services.mysql.replication.serverId = 2;
services.mysql.replication.masterHost = nodes.master.config.networking.hostName;
services.mysql.replication.masterUser = replicateUser;
services.mysql.replication.masterPassword = replicatePassword;
};
slave2 =
{ pkgs, nodes, ... }:
{
services.mysql.enable = true;
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services.mysql.package = pkgs.mysql;
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services.mysql.replication.role = "slave";
services.mysql.replication.serverId = 3;
services.mysql.replication.masterHost = nodes.master.config.networking.hostName;
services.mysql.replication.masterUser = replicateUser;
services.mysql.replication.masterPassword = replicatePassword;
};
};
testScript = ''
$master->start;
$master->waitForUnit("mysql");
$master->waitForOpenPort(3306);
# Wait for testdb to be fully populated (5 rows).
$master->waitUntilSucceeds("mysql -u root -D testdb -N -B -e 'select count(id) from tests' | grep -q 5");
$slave1->start;
$slave2->start;
$slave1->waitForUnit("mysql");
$slave1->waitForOpenPort(3306);
$slave2->waitForUnit("mysql");
$slave2->waitForOpenPort(3306);
# wait for replications to finish
$slave1->waitUntilSucceeds("mysql -u root -D testdb -N -B -e 'select count(id) from tests' | grep -q 5");
$slave2->waitUntilSucceeds("mysql -u root -D testdb -N -B -e 'select count(id) from tests' | grep -q 5");
$slave2->succeed("systemctl stop mysql");
$master->succeed("echo 'insert into testdb.tests values (123, 456);' | mysql -u root -N");
$slave2->succeed("systemctl start mysql");
$slave2->waitForUnit("mysql");
$slave2->waitForOpenPort(3306);
$slave2->waitUntilSucceeds("echo 'select * from testdb.tests where Id = 123;' | mysql -u root -N | grep 456");
'';
})