depot/cluster/services/patroni/worker.nix

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{ cluster, config, depot, lib, ... }:
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let
inherit (cluster.config) vars;
getMeshIp = name: vars.mesh.${name}.meshIp;
net = vars.meshNet.cidr;
pg = depot.packages.postgresql;
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baseDir = "/srv/storage/database/postgres-ha";
walDir = "/var/lib/postgres-ha/${pg.psqlSchema}/wal";
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in
{
imports = [
depot.nixosModules.patroni
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];
age.secrets = lib.mapAttrs (_: file: {
inherit file;
mode = "0400";
owner = "patroni";
group = "patroni";
}) vars.patroni.passwords;
systemd.tmpfiles.rules = [
"d '${baseDir}' 0700 patroni patroni - -"
"d '${walDir}' 0700 patroni patroni - -"
];
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services.patroni = {
enable = true;
name = vars.hostName;
postgresqlPackage = pg;
postgresqlDataDir ="${baseDir}/${pg.psqlSchema}";
postgresqlPort = cluster.config.links.patroni-pg-internal.port;
restApiPort = cluster.config.links.patroni-api.port;
scope = "poseidon";
namespace = "/patroni";
nodeIp = getMeshIp vars.hostName;
otherNodesIps = map getMeshIp cluster.config.services.patroni.otherNodes.worker;
raft = false;
softwareWatchdog = true;
settings = {
consul = {
host = "127.0.0.1:8500";
register_service = true;
};
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bootstrap.dcs = {
ttl = 30;
loop_wait = 10;
retry_timeout = 10;
maximum_lag_on_failover = 1024 * 1024;
};
failsafe_mode = true;
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postgresql = {
basebackup = {
waldir = walDir;
};
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use_pg_rewind = true;
use_slots = true;
authentication = {
replication.username = "patronirep";
rewind.username = "patronirew";
superuser.username = "postgres";
};
parameters = {
listen_addresses = getMeshIp vars.hostName;
wal_level = "replica";
hot_standby_feedback = "on";
unix_socket_directories = "/tmp";
};
pg_hba = [
"host replication patronirep ${net} scram-sha-256"
"host all patronirew ${net} scram-sha-256"
"host all postgres ${net} scram-sha-256"
"host all all ${net} scram-sha-256"
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"host all all 127.0.0.1/32 scram-sha-256"
];
};
};
environmentFiles = lib.mapAttrs (n: _: config.age.secrets.${n}.path) vars.patroni.passwords;
};
}