625 lines
23 KiB
Nix
625 lines
23 KiB
Nix
{ config, options, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.neo4j;
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opt = options.services.neo4j;
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certDirOpt = options.services.neo4j.directories.certificates;
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isDefaultPathOption = opt: isOption opt && opt.type == types.path && opt.highestPrio >= 1500;
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sslPolicies = mapAttrsToList (
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name: conf: ''
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dbms.ssl.policy.${name}.allow_key_generation=${boolToString conf.allowKeyGeneration}
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dbms.ssl.policy.${name}.base_directory=${conf.baseDirectory}
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${optionalString (conf.ciphers != null) ''
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dbms.ssl.policy.${name}.ciphers=${concatStringsSep "," conf.ciphers}
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''}
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dbms.ssl.policy.${name}.client_auth=${conf.clientAuth}
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${if length (splitString "/" conf.privateKey) > 1 then
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"dbms.ssl.policy.${name}.private_key=${conf.privateKey}"
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else
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"dbms.ssl.policy.${name}.private_key=${conf.baseDirectory}/${conf.privateKey}"
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}
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${if length (splitString "/" conf.privateKey) > 1 then
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"dbms.ssl.policy.${name}.public_certificate=${conf.publicCertificate}"
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else
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"dbms.ssl.policy.${name}.public_certificate=${conf.baseDirectory}/${conf.publicCertificate}"
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}
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dbms.ssl.policy.${name}.revoked_dir=${conf.revokedDir}
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dbms.ssl.policy.${name}.tls_versions=${concatStringsSep "," conf.tlsVersions}
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dbms.ssl.policy.${name}.trust_all=${boolToString conf.trustAll}
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dbms.ssl.policy.${name}.trusted_dir=${conf.trustedDir}
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''
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) cfg.ssl.policies;
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serverConfig = pkgs.writeText "neo4j.conf" ''
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# General
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server.default_listen_address=${cfg.defaultListenAddress}
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server.databases.default_to_read_only=${boolToString cfg.readOnly}
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${optionalString (cfg.workerCount > 0) ''
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dbms.threads.worker_count=${toString cfg.workerCount}
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''}
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# Directories (readonly)
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# dbms.directories.certificates=${cfg.directories.certificates}
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server.directories.plugins=${cfg.directories.plugins}
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server.directories.lib=${cfg.package}/share/neo4j/lib
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${optionalString (cfg.constrainLoadCsv) ''
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server.directories.import=${cfg.directories.imports}
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''}
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# Directories (read and write)
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server.directories.data=${cfg.directories.data}
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server.directories.logs=${cfg.directories.home}/logs
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server.directories.run=${cfg.directories.home}/run
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# HTTP Connector
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${optionalString (cfg.http.enable) ''
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server.http.enabled=${boolToString cfg.http.enable}
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server.http.listen_address=${cfg.http.listenAddress}
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server.http.advertised_address=${cfg.http.listenAddress}
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''}
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# HTTPS Connector
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server.https.enabled=${boolToString cfg.https.enable}
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server.https.listen_address=${cfg.https.listenAddress}
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server.https.advertised_address=${cfg.https.listenAddress}
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# BOLT Connector
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server.bolt.enabled=${boolToString cfg.bolt.enable}
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server.bolt.listen_address=${cfg.bolt.listenAddress}
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server.bolt.advertised_address=${cfg.bolt.listenAddress}
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server.bolt.tls_level=${cfg.bolt.tlsLevel}
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# SSL Policies
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${concatStringsSep "\n" sslPolicies}
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# Default retention policy from neo4j.conf
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db.tx_log.rotation.retention_policy=1 days
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# Default JVM parameters from neo4j.conf
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server.jvm.additional=-XX:+UseG1GC
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server.jvm.additional=-XX:-OmitStackTraceInFastThrow
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server.jvm.additional=-XX:+AlwaysPreTouch
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server.jvm.additional=-XX:+UnlockExperimentalVMOptions
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server.jvm.additional=-XX:+TrustFinalNonStaticFields
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server.jvm.additional=-XX:+DisableExplicitGC
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server.jvm.additional=-Djdk.tls.ephemeralDHKeySize=2048
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server.jvm.additional=-Djdk.tls.rejectClientInitiatedRenegotiation=true
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server.jvm.additional=-Dunsupported.dbms.udc.source=tarball
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#server.memory.off_heap.transaction_max_size=12000m
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#server.memory.heap.max_size=12000m
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#server.memory.pagecache.size=4g
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#server.tx_state.max_off_heap_memory=8000m
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# Extra Configuration
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${cfg.extraServerConfig}
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'';
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in {
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imports = [
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(mkRenamedOptionModule [ "services" "neo4j" "host" ] [ "services" "neo4j" "defaultListenAddress" ])
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(mkRenamedOptionModule [ "services" "neo4j" "listenAddress" ] [ "services" "neo4j" "defaultListenAddress" ])
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(mkRenamedOptionModule [ "services" "neo4j" "enableBolt" ] [ "services" "neo4j" "bolt" "enable" ])
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(mkRenamedOptionModule [ "services" "neo4j" "enableHttps" ] [ "services" "neo4j" "https" "enable" ])
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(mkRenamedOptionModule [ "services" "neo4j" "certDir" ] [ "services" "neo4j" "directories" "certificates" ])
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(mkRenamedOptionModule [ "services" "neo4j" "dataDir" ] [ "services" "neo4j" "directories" "home" ])
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(mkRemovedOptionModule [ "services" "neo4j" "port" ] "Use services.neo4j.http.listenAddress instead.")
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(mkRemovedOptionModule [ "services" "neo4j" "boltPort" ] "Use services.neo4j.bolt.listenAddress instead.")
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(mkRemovedOptionModule [ "services" "neo4j" "httpsPort" ] "Use services.neo4j.https.listenAddress instead.")
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(mkRemovedOptionModule [ "services" "neo4j" "shell" "enabled" ] "shell.enabled was removed upstream")
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(mkRemovedOptionModule [ "services" "neo4j" "udc" "enabled" ] "udc.enabled was removed upstream")
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];
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###### interface
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options.services.neo4j = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to enable Neo4j Community Edition.
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'';
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};
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constrainLoadCsv = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Sets the root directory for file URLs used with the Cypher
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`LOAD CSV` clause to be that defined by
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{option}`directories.imports`. It restricts
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access to only those files within that directory and its
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subdirectories.
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Setting this option to `false` introduces
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possible security problems.
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'';
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};
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defaultListenAddress = mkOption {
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type = types.str;
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default = "127.0.0.1";
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description = ''
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Default network interface to listen for incoming connections. To
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listen for connections on all interfaces, use "0.0.0.0".
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Specifies the default IP address and address part of connector
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specific {option}`listenAddress` options. To bind specific
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connectors to a specific network interfaces, specify the entire
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{option}`listenAddress` option for that connector.
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'';
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};
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extraServerConfig = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Extra configuration for Neo4j Community server. Refer to the
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[complete reference](https://neo4j.com/docs/operations-manual/current/reference/configuration-settings/)
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of Neo4j configuration settings.
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'';
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};
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package = mkPackageOption pkgs "neo4j" { };
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readOnly = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Only allow read operations from this Neo4j instance.
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'';
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};
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workerCount = mkOption {
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type = types.ints.between 0 44738;
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default = 0;
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description = ''
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Number of Neo4j worker threads, where the default of
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`0` indicates a worker count equal to the number of
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available processors.
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'';
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};
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bolt = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Enable the BOLT connector for Neo4j. Setting this option to
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`false` will stop Neo4j from listening for incoming
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connections on the BOLT port (7687 by default).
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'';
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};
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listenAddress = mkOption {
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type = types.str;
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default = ":7687";
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description = ''
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Neo4j listen address for BOLT traffic. The listen address is
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expressed in the format `<ip-address>:<port-number>`.
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'';
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};
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sslPolicy = mkOption {
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type = types.str;
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default = "legacy";
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description = ''
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Neo4j SSL policy for BOLT traffic.
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The legacy policy is a special policy which is not defined in
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the policy configuration section, but rather derives from
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{option}`directories.certificates` and
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associated files (by default: {file}`neo4j.key` and
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{file}`neo4j.cert`). Its use will be deprecated.
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Note: This connector must be configured to support/require
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SSL/TLS for the legacy policy to actually be utilized. See
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{option}`bolt.tlsLevel`.
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'';
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};
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tlsLevel = mkOption {
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type = types.enum [ "REQUIRED" "OPTIONAL" "DISABLED" ];
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default = "OPTIONAL";
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description = ''
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SSL/TSL requirement level for BOLT traffic.
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'';
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};
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};
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directories = {
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certificates = mkOption {
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type = types.path;
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default = "${cfg.directories.home}/certificates";
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defaultText = literalExpression ''"''${config.${opt.directories.home}}/certificates"'';
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description = ''
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Directory for storing certificates to be used by Neo4j for
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TLS connections.
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When setting this directory to something other than its default,
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ensure the directory's existence, and that read/write permissions are
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given to the Neo4j daemon user `neo4j`.
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Note that changing this directory from its default will prevent
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the directory structure required for each SSL policy from being
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automatically generated. A policy's directory structure as defined by
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its {option}`baseDirectory`,{option}`revokedDir` and
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{option}`trustedDir` must then be setup manually. The
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existence of these directories is mandatory, as well as the presence
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of the certificate file and the private key. Ensure the correct
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permissions are set on these directories and files.
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'';
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};
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data = mkOption {
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type = types.path;
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default = "${cfg.directories.home}/data";
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defaultText = literalExpression ''"''${config.${opt.directories.home}}/data"'';
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description = ''
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Path of the data directory. You must not configure more than one
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Neo4j installation to use the same data directory.
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When setting this directory to something other than its default,
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ensure the directory's existence, and that read/write permissions are
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given to the Neo4j daemon user `neo4j`.
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'';
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};
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home = mkOption {
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type = types.path;
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default = "/var/lib/neo4j";
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description = ''
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Path of the Neo4j home directory. Other default directories are
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subdirectories of this path. This directory will be created if
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non-existent, and its ownership will be {command}`chown` to
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the Neo4j daemon user `neo4j`.
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'';
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};
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imports = mkOption {
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type = types.path;
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default = "${cfg.directories.home}/import";
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defaultText = literalExpression ''"''${config.${opt.directories.home}}/import"'';
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description = ''
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The root directory for file URLs used with the Cypher
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`LOAD CSV` clause. Only meaningful when
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{option}`constrainLoadCvs` is set to
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`true`.
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When setting this directory to something other than its default,
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ensure the directory's existence, and that read permission is
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given to the Neo4j daemon user `neo4j`.
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'';
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};
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plugins = mkOption {
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type = types.path;
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default = "${cfg.directories.home}/plugins";
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defaultText = literalExpression ''"''${config.${opt.directories.home}}/plugins"'';
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description = ''
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Path of the database plugin directory. Compiled Java JAR files that
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contain database procedures will be loaded if they are placed in
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this directory.
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When setting this directory to something other than its default,
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ensure the directory's existence, and that read permission is
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given to the Neo4j daemon user `neo4j`.
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'';
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};
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};
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http = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Enable the HTTP connector for Neo4j. Setting this option to
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`false` will stop Neo4j from listening for incoming
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connections on the HTTPS port (7474 by default).
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'';
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};
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listenAddress = mkOption {
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type = types.str;
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default = ":7474";
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description = ''
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Neo4j listen address for HTTP traffic. The listen address is
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expressed in the format `<ip-address>:<port-number>`.
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'';
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};
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};
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https = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Enable the HTTPS connector for Neo4j. Setting this option to
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`false` will stop Neo4j from listening for incoming
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connections on the HTTPS port (7473 by default).
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'';
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};
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listenAddress = mkOption {
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type = types.str;
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default = ":7473";
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description = ''
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Neo4j listen address for HTTPS traffic. The listen address is
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expressed in the format `<ip-address>:<port-number>`.
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'';
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};
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sslPolicy = mkOption {
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type = types.str;
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default = "legacy";
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description = ''
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Neo4j SSL policy for HTTPS traffic.
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The legacy policy is a special policy which is not defined in the
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policy configuration section, but rather derives from
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{option}`directories.certificates` and
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associated files (by default: {file}`neo4j.key` and
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{file}`neo4j.cert`). Its use will be deprecated.
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'';
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};
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};
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shell = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable a remote shell server which Neo4j Shell clients can log in to.
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Only applicable to {command}`neo4j-shell`.
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'';
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};
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};
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ssl.policies = mkOption {
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type = with types; attrsOf (submodule ({ name, config, options, ... }: {
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options = {
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allowKeyGeneration = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Allows the generation of a private key and associated self-signed
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certificate. Only performed when both objects cannot be found for
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this policy. It is recommended to turn this off again after keys
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have been generated.
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The public certificate is required to be duplicated to the
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directory holding trusted certificates as defined by the
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{option}`trustedDir` option.
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Keys should in general be generated and distributed offline by a
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trusted certificate authority and not by utilizing this mode.
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'';
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};
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baseDirectory = mkOption {
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type = types.path;
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default = "${cfg.directories.certificates}/${name}";
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defaultText = literalExpression ''"''${config.${opt.directories.certificates}}/''${name}"'';
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description = ''
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The mandatory base directory for cryptographic objects of this
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policy. This path is only automatically generated when this
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option as well as {option}`directories.certificates` are
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left at their default. Ensure read/write permissions are given
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to the Neo4j daemon user `neo4j`.
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It is also possible to override each individual
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configuration with absolute paths. See the
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{option}`privateKey` and {option}`publicCertificate`
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policy options.
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'';
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};
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ciphers = mkOption {
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type = types.nullOr (types.listOf types.str);
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default = null;
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description = ''
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Restrict the allowed ciphers of this policy to those defined
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here. The default ciphers are those of the JVM platform.
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'';
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};
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clientAuth = mkOption {
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type = types.enum [ "NONE" "OPTIONAL" "REQUIRE" ];
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default = "REQUIRE";
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description = ''
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The client authentication stance for this policy.
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'';
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};
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privateKey = mkOption {
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type = types.str;
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default = "private.key";
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description = ''
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The name of private PKCS #8 key file for this policy to be found
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in the {option}`baseDirectory`, or the absolute path to
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the key file. It is mandatory that a key can be found or generated.
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'';
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};
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publicCertificate = mkOption {
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type = types.str;
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default = "public.crt";
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description = ''
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The name of public X.509 certificate (chain) file in PEM format
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for this policy to be found in the {option}`baseDirectory`,
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or the absolute path to the certificate file. It is mandatory
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that a certificate can be found or generated.
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The public certificate is required to be duplicated to the
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directory holding trusted certificates as defined by the
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{option}`trustedDir` option.
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'';
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};
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revokedDir = mkOption {
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type = types.path;
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default = "${config.baseDirectory}/revoked";
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defaultText = literalExpression ''"''${config.${options.baseDirectory}}/revoked"'';
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description = ''
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Path to directory of CRLs (Certificate Revocation Lists) in
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PEM format. Must be an absolute path. The existence of this
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directory is mandatory and will need to be created manually when:
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setting this option to something other than its default; setting
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either this policy's {option}`baseDirectory` or
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{option}`directories.certificates` to something other than
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their default. Ensure read/write permissions are given to the
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Neo4j daemon user `neo4j`.
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'';
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};
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tlsVersions = mkOption {
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type = types.listOf types.str;
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default = [ "TLSv1.2" ];
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description = ''
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Restrict the TLS protocol versions of this policy to those
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defined here.
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'';
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};
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trustAll = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Makes this policy trust all remote parties. Enabling this is not
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recommended and the policy's trusted directory will be ignored.
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Use of this mode is discouraged. It would offer encryption but
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no security.
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'';
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};
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trustedDir = mkOption {
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type = types.path;
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default = "${config.baseDirectory}/trusted";
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defaultText = literalExpression ''"''${config.${options.baseDirectory}}/trusted"'';
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description = ''
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Path to directory of X.509 certificates in PEM format for
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trusted parties. Must be an absolute path. The existence of this
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directory is mandatory and will need to be created manually when:
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setting this option to something other than its default; setting
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either this policy's {option}`baseDirectory` or
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{option}`directories.certificates` to something other than
|
|
their default. Ensure read/write permissions are given to the
|
|
Neo4j daemon user `neo4j`.
|
|
|
|
The public certificate as defined by
|
|
{option}`publicCertificate` is required to be duplicated
|
|
to this directory.
|
|
'';
|
|
};
|
|
|
|
directoriesToCreate = mkOption {
|
|
type = types.listOf types.path;
|
|
internal = true;
|
|
readOnly = true;
|
|
description = ''
|
|
Directories of this policy that will be created automatically
|
|
when the certificates directory is left at its default value.
|
|
This includes all options of type path that are left at their
|
|
default value.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
config.directoriesToCreate = optionals
|
|
(certDirOpt.highestPrio >= 1500 && options.baseDirectory.highestPrio >= 1500)
|
|
(map (opt: opt.value) (filter isDefaultPathOption (attrValues options)));
|
|
|
|
}));
|
|
default = {};
|
|
description = ''
|
|
Defines the SSL policies for use with Neo4j connectors. Each attribute
|
|
of this set defines a policy, with the attribute name defining the name
|
|
of the policy and its namespace. Refer to the operations manual section
|
|
on Neo4j's
|
|
[SSL Framework](https://neo4j.com/docs/operations-manual/current/security/ssl-framework/)
|
|
for further details.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
###### implementation
|
|
|
|
config =
|
|
let
|
|
# Assertion helpers
|
|
policyNameList = attrNames cfg.ssl.policies;
|
|
validPolicyNameList = [ "legacy" ] ++ policyNameList;
|
|
validPolicyNameString = concatStringsSep ", " validPolicyNameList;
|
|
|
|
# Capture various directories left at their default so they can be created.
|
|
defaultDirectoriesToCreate = map (opt: opt.value) (filter isDefaultPathOption (attrValues options.services.neo4j.directories));
|
|
policyDirectoriesToCreate = concatMap (pol: pol.directoriesToCreate) (attrValues cfg.ssl.policies);
|
|
in
|
|
|
|
mkIf cfg.enable {
|
|
assertions = [
|
|
{ assertion = !elem "legacy" policyNameList;
|
|
message = "The policy 'legacy' is special to Neo4j, and its name is reserved."; }
|
|
{ assertion = elem cfg.bolt.sslPolicy validPolicyNameList;
|
|
message = "Invalid policy assigned: `services.neo4j.bolt.sslPolicy = \"${cfg.bolt.sslPolicy}\"`, defined policies are: ${validPolicyNameString}"; }
|
|
{ assertion = elem cfg.https.sslPolicy validPolicyNameList;
|
|
message = "Invalid policy assigned: `services.neo4j.https.sslPolicy = \"${cfg.https.sslPolicy}\"`, defined policies are: ${validPolicyNameString}"; }
|
|
];
|
|
|
|
systemd.services.neo4j = {
|
|
description = "Neo4j Daemon";
|
|
wantedBy = [ "multi-user.target" ];
|
|
after = [ "network.target" ];
|
|
environment = {
|
|
NEO4J_HOME = "${cfg.directories.home}";
|
|
NEO4J_CONF = "${cfg.directories.home}/conf";
|
|
};
|
|
serviceConfig = {
|
|
ExecStart = "${cfg.package}/bin/neo4j console";
|
|
User = "neo4j";
|
|
PermissionsStartOnly = true;
|
|
LimitNOFILE = 40000;
|
|
};
|
|
|
|
preStart = ''
|
|
# Directories Setup
|
|
# Always ensure home exists with nested conf, logs directories.
|
|
mkdir -m 0700 -p ${cfg.directories.home}/{conf,logs}
|
|
|
|
# Create other sub-directories and policy directories that have been left at their default.
|
|
${concatMapStringsSep "\n" (
|
|
dir: ''
|
|
mkdir -m 0700 -p ${dir}
|
|
'') (defaultDirectoriesToCreate ++ policyDirectoriesToCreate)}
|
|
|
|
# Place the configuration where Neo4j can find it.
|
|
ln -fs ${serverConfig} ${cfg.directories.home}/conf/neo4j.conf
|
|
|
|
# Ensure neo4j user ownership
|
|
chown -R neo4j ${cfg.directories.home}
|
|
'';
|
|
};
|
|
|
|
environment.systemPackages = [ cfg.package ];
|
|
|
|
users.users.neo4j = {
|
|
isSystemUser = true;
|
|
group = "neo4j";
|
|
description = "Neo4j daemon user";
|
|
home = cfg.directories.home;
|
|
};
|
|
users.groups.neo4j = {};
|
|
};
|
|
|
|
meta = {
|
|
maintainers = with lib.maintainers; [ patternspandemic ];
|
|
};
|
|
}
|