forked from mirrors/nixpkgs
480 lines
17 KiB
Nix
480 lines
17 KiB
Nix
{ config, lib, pkgs, ... }:
|
||
|
||
with lib;
|
||
|
||
let
|
||
cfg = config.services.cassandra;
|
||
defaultUser = "cassandra";
|
||
cassandraConfig = flip recursiveUpdate cfg.extraConfig
|
||
({ commitlog_sync = "batch";
|
||
commitlog_sync_batch_window_in_ms = 2;
|
||
start_native_transport = cfg.allowClients;
|
||
cluster_name = cfg.clusterName;
|
||
partitioner = "org.apache.cassandra.dht.Murmur3Partitioner";
|
||
endpoint_snitch = "SimpleSnitch";
|
||
data_file_directories = [ "${cfg.homeDir}/data" ];
|
||
commitlog_directory = "${cfg.homeDir}/commitlog";
|
||
saved_caches_directory = "${cfg.homeDir}/saved_caches";
|
||
} // (lib.optionalAttrs (cfg.seedAddresses != []) {
|
||
seed_provider = [{
|
||
class_name = "org.apache.cassandra.locator.SimpleSeedProvider";
|
||
parameters = [ { seeds = concatStringsSep "," cfg.seedAddresses; } ];
|
||
}];
|
||
}) // (lib.optionalAttrs (lib.versionAtLeast cfg.package.version "3") {
|
||
hints_directory = "${cfg.homeDir}/hints";
|
||
})
|
||
);
|
||
cassandraConfigWithAddresses = cassandraConfig //
|
||
( if cfg.listenAddress == null
|
||
then { listen_interface = cfg.listenInterface; }
|
||
else { listen_address = cfg.listenAddress; }
|
||
) // (
|
||
if cfg.rpcAddress == null
|
||
then { rpc_interface = cfg.rpcInterface; }
|
||
else { rpc_address = cfg.rpcAddress; }
|
||
);
|
||
cassandraEtc = pkgs.stdenv.mkDerivation
|
||
{ name = "cassandra-etc";
|
||
cassandraYaml = builtins.toJSON cassandraConfigWithAddresses;
|
||
cassandraEnvPkg = "${cfg.package}/conf/cassandra-env.sh";
|
||
cassandraLogbackConfig = pkgs.writeText "logback.xml" cfg.logbackConfig;
|
||
buildCommand = ''
|
||
mkdir -p "$out"
|
||
|
||
echo "$cassandraYaml" > "$out/cassandra.yaml"
|
||
ln -s "$cassandraLogbackConfig" "$out/logback.xml"
|
||
|
||
cp "$cassandraEnvPkg" "$out/cassandra-env.sh"
|
||
|
||
# Delete default JMX Port, otherwise we can't set it using env variable
|
||
sed -i '/JMX_PORT="7199"/d' "$out/cassandra-env.sh"
|
||
|
||
# Delete default password file
|
||
sed -i '/-Dcom.sun.management.jmxremote.password.file=\/etc\/cassandra\/jmxremote.password/d' "$out/cassandra-env.sh"
|
||
'';
|
||
};
|
||
defaultJmxRolesFile = builtins.foldl'
|
||
(left: right: left + right) ""
|
||
(map (role: "${role.username} ${role.password}") cfg.jmxRoles);
|
||
fullJvmOptions = cfg.jvmOpts
|
||
++ lib.optionals (cfg.jmxRoles != []) [
|
||
"-Dcom.sun.management.jmxremote.authenticate=true"
|
||
"-Dcom.sun.management.jmxremote.password.file=${cfg.jmxRolesFile}"
|
||
]
|
||
++ lib.optionals cfg.remoteJmx [
|
||
"-Djava.rmi.server.hostname=${cfg.rpcAddress}"
|
||
];
|
||
in {
|
||
options.services.cassandra = {
|
||
enable = mkEnableOption ''
|
||
Apache Cassandra – Scalable and highly available database.
|
||
'';
|
||
clusterName = mkOption {
|
||
type = types.str;
|
||
default = "Test Cluster";
|
||
description = ''
|
||
The name of the cluster.
|
||
This setting prevents nodes in one logical cluster from joining
|
||
another. All nodes in a cluster must have the same value.
|
||
'';
|
||
};
|
||
user = mkOption {
|
||
type = types.str;
|
||
default = defaultUser;
|
||
description = "Run Apache Cassandra under this user.";
|
||
};
|
||
group = mkOption {
|
||
type = types.str;
|
||
default = defaultUser;
|
||
description = "Run Apache Cassandra under this group.";
|
||
};
|
||
homeDir = mkOption {
|
||
type = types.path;
|
||
default = "/var/lib/cassandra";
|
||
description = ''
|
||
Home directory for Apache Cassandra.
|
||
'';
|
||
};
|
||
package = mkOption {
|
||
type = types.package;
|
||
default = pkgs.cassandra;
|
||
defaultText = "pkgs.cassandra";
|
||
example = literalExample "pkgs.cassandra_3_11";
|
||
description = ''
|
||
The Apache Cassandra package to use.
|
||
'';
|
||
};
|
||
jvmOpts = mkOption {
|
||
type = types.listOf types.str;
|
||
default = [];
|
||
description = ''
|
||
Populate the JVM_OPT environment variable.
|
||
'';
|
||
};
|
||
listenAddress = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = "127.0.0.1";
|
||
example = literalExample "null";
|
||
description = ''
|
||
Address or interface to bind to and tell other Cassandra nodes
|
||
to connect to. You _must_ change this if you want multiple
|
||
nodes to be able to communicate!
|
||
|
||
Set listenAddress OR listenInterface, not both.
|
||
|
||
Leaving it blank leaves it up to
|
||
InetAddress.getLocalHost(). This will always do the Right
|
||
Thing _if_ the node is properly configured (hostname, name
|
||
resolution, etc), and the Right Thing is to use the address
|
||
associated with the hostname (it might not be).
|
||
|
||
Setting listen_address to 0.0.0.0 is always wrong.
|
||
'';
|
||
};
|
||
listenInterface = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = null;
|
||
example = "eth1";
|
||
description = ''
|
||
Set listenAddress OR listenInterface, not both. Interfaces
|
||
must correspond to a single address, IP aliasing is not
|
||
supported.
|
||
'';
|
||
};
|
||
rpcAddress = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = "127.0.0.1";
|
||
example = literalExample "null";
|
||
description = ''
|
||
The address or interface to bind the native transport server to.
|
||
|
||
Set rpcAddress OR rpcInterface, not both.
|
||
|
||
Leaving rpcAddress blank has the same effect as on
|
||
listenAddress (i.e. it will be based on the configured hostname
|
||
of the node).
|
||
|
||
Note that unlike listenAddress, you can specify 0.0.0.0, but you
|
||
must also set extraConfig.broadcast_rpc_address to a value other
|
||
than 0.0.0.0.
|
||
|
||
For security reasons, you should not expose this port to the
|
||
internet. Firewall it if needed.
|
||
'';
|
||
};
|
||
rpcInterface = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = null;
|
||
example = "eth1";
|
||
description = ''
|
||
Set rpcAddress OR rpcInterface, not both. Interfaces must
|
||
correspond to a single address, IP aliasing is not supported.
|
||
'';
|
||
};
|
||
logbackConfig = mkOption {
|
||
type = types.lines;
|
||
default = ''
|
||
<configuration scan="false">
|
||
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
|
||
<encoder>
|
||
<pattern>%-5level %date{HH:mm:ss,SSS} %msg%n</pattern>
|
||
</encoder>
|
||
</appender>
|
||
|
||
<root level="INFO">
|
||
<appender-ref ref="STDOUT" />
|
||
</root>
|
||
|
||
<logger name="com.thinkaurelius.thrift" level="ERROR"/>
|
||
</configuration>
|
||
'';
|
||
description = ''
|
||
XML logback configuration for cassandra
|
||
'';
|
||
};
|
||
seedAddresses = mkOption {
|
||
type = types.listOf types.str;
|
||
default = [ "127.0.0.1" ];
|
||
description = ''
|
||
The addresses of hosts designated as contact points in the cluster. A
|
||
joining node contacts one of the nodes in the seeds list to learn the
|
||
topology of the ring.
|
||
Set to 127.0.0.1 for a single node cluster.
|
||
'';
|
||
};
|
||
allowClients = mkOption {
|
||
type = types.bool;
|
||
default = true;
|
||
description = ''
|
||
Enables or disables the native transport server (CQL binary protocol).
|
||
This server uses the same address as the <literal>rpcAddress</literal>,
|
||
but the port it uses is not <literal>rpc_port</literal> but
|
||
<literal>native_transport_port</literal>. See the official Cassandra
|
||
docs for more information on these variables and set them using
|
||
<literal>extraConfig</literal>.
|
||
'';
|
||
};
|
||
extraConfig = mkOption {
|
||
type = types.attrs;
|
||
default = {};
|
||
example =
|
||
{ commitlog_sync_batch_window_in_ms = 3;
|
||
};
|
||
description = ''
|
||
Extra options to be merged into cassandra.yaml as nix attribute set.
|
||
'';
|
||
};
|
||
fullRepairInterval = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = "3w";
|
||
example = literalExample "null";
|
||
description = ''
|
||
Set the interval how often full repairs are run, i.e.
|
||
<literal>nodetool repair --full</literal> is executed. See
|
||
https://cassandra.apache.org/doc/latest/operating/repair.html
|
||
for more information.
|
||
|
||
Set to <literal>null</literal> to disable full repairs.
|
||
'';
|
||
};
|
||
fullRepairOptions = mkOption {
|
||
type = types.listOf types.str;
|
||
default = [];
|
||
example = [ "--partitioner-range" ];
|
||
description = ''
|
||
Options passed through to the full repair command.
|
||
'';
|
||
};
|
||
incrementalRepairInterval = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = "3d";
|
||
example = literalExample "null";
|
||
description = ''
|
||
Set the interval how often incremental repairs are run, i.e.
|
||
<literal>nodetool repair</literal> is executed. See
|
||
https://cassandra.apache.org/doc/latest/operating/repair.html
|
||
for more information.
|
||
|
||
Set to <literal>null</literal> to disable incremental repairs.
|
||
'';
|
||
};
|
||
incrementalRepairOptions = mkOption {
|
||
type = types.listOf types.str;
|
||
default = [];
|
||
example = [ "--partitioner-range" ];
|
||
description = ''
|
||
Options passed through to the incremental repair command.
|
||
'';
|
||
};
|
||
maxHeapSize = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = null;
|
||
example = "4G";
|
||
description = ''
|
||
Must be left blank or set together with heapNewSize.
|
||
If left blank a sensible value for the available amount of RAM and CPU
|
||
cores is calculated.
|
||
|
||
Override to set the amount of memory to allocate to the JVM at
|
||
start-up. For production use you may wish to adjust this for your
|
||
environment. MAX_HEAP_SIZE is the total amount of memory dedicated
|
||
to the Java heap. HEAP_NEWSIZE refers to the size of the young
|
||
generation.
|
||
|
||
The main trade-off for the young generation is that the larger it
|
||
is, the longer GC pause times will be. The shorter it is, the more
|
||
expensive GC will be (usually).
|
||
'';
|
||
};
|
||
heapNewSize = mkOption {
|
||
type = types.nullOr types.str;
|
||
default = null;
|
||
example = "800M";
|
||
description = ''
|
||
Must be left blank or set together with heapNewSize.
|
||
If left blank a sensible value for the available amount of RAM and CPU
|
||
cores is calculated.
|
||
|
||
Override to set the amount of memory to allocate to the JVM at
|
||
start-up. For production use you may wish to adjust this for your
|
||
environment. HEAP_NEWSIZE refers to the size of the young
|
||
generation.
|
||
|
||
The main trade-off for the young generation is that the larger it
|
||
is, the longer GC pause times will be. The shorter it is, the more
|
||
expensive GC will be (usually).
|
||
|
||
The example HEAP_NEWSIZE assumes a modern 8-core+ machine for decent pause
|
||
times. If in doubt, and if you do not particularly want to tweak, go with
|
||
100 MB per physical CPU core.
|
||
'';
|
||
};
|
||
mallocArenaMax = mkOption {
|
||
type = types.nullOr types.int;
|
||
default = null;
|
||
example = 4;
|
||
description = ''
|
||
Set this to control the amount of arenas per-thread in glibc.
|
||
'';
|
||
};
|
||
remoteJmx = mkOption {
|
||
type = types.bool;
|
||
default = false;
|
||
description = ''
|
||
Cassandra ships with JMX accessible *only* from localhost.
|
||
To enable remote JMX connections set to true.
|
||
|
||
Be sure to also enable authentication and/or TLS.
|
||
See: https://wiki.apache.org/cassandra/JmxSecurity
|
||
'';
|
||
};
|
||
jmxPort = mkOption {
|
||
type = types.int;
|
||
default = 7199;
|
||
description = ''
|
||
Specifies the default port over which Cassandra will be available for
|
||
JMX connections.
|
||
For security reasons, you should not expose this port to the internet.
|
||
Firewall it if needed.
|
||
'';
|
||
};
|
||
jmxRoles = mkOption {
|
||
default = [];
|
||
description = ''
|
||
Roles that are allowed to access the JMX (e.g. nodetool)
|
||
BEWARE: The passwords will be stored world readable in the nix-store.
|
||
It's recommended to use your own protected file using
|
||
<literal>jmxRolesFile</literal>
|
||
|
||
Doesn't work in versions older than 3.11 because they don't like that
|
||
it's world readable.
|
||
'';
|
||
type = types.listOf (types.submodule {
|
||
options = {
|
||
username = mkOption {
|
||
type = types.str;
|
||
description = "Username for JMX";
|
||
};
|
||
password = mkOption {
|
||
type = types.str;
|
||
description = "Password for JMX";
|
||
};
|
||
};
|
||
});
|
||
};
|
||
jmxRolesFile = mkOption {
|
||
type = types.nullOr types.path;
|
||
default = if (lib.versionAtLeast cfg.package.version "3.11")
|
||
then pkgs.writeText "jmx-roles-file" defaultJmxRolesFile
|
||
else null;
|
||
example = "/var/lib/cassandra/jmx.password";
|
||
description = ''
|
||
Specify your own jmx roles file.
|
||
|
||
Make sure the permissions forbid "others" from reading the file if
|
||
you're using Cassandra below version 3.11.
|
||
'';
|
||
};
|
||
};
|
||
|
||
config = mkIf cfg.enable {
|
||
assertions =
|
||
[ { assertion = (cfg.listenAddress == null) != (cfg.listenInterface == null);
|
||
message = "You have to set either listenAddress or listenInterface";
|
||
}
|
||
{ assertion = (cfg.rpcAddress == null) != (cfg.rpcInterface == null);
|
||
message = "You have to set either rpcAddress or rpcInterface";
|
||
}
|
||
{ assertion = (cfg.maxHeapSize == null) == (cfg.heapNewSize == null);
|
||
message = "If you set either of maxHeapSize or heapNewSize you have to set both";
|
||
}
|
||
{ assertion = cfg.remoteJmx -> cfg.jmxRolesFile != null;
|
||
message = ''
|
||
If you want JMX available remotely you need to set a password using
|
||
<literal>jmxRoles</literal> or <literal>jmxRolesFile</literal> if
|
||
using Cassandra older than v3.11.
|
||
'';
|
||
}
|
||
];
|
||
users = mkIf (cfg.user == defaultUser) {
|
||
extraUsers.${defaultUser} =
|
||
{ group = cfg.group;
|
||
home = cfg.homeDir;
|
||
createHome = true;
|
||
uid = config.ids.uids.cassandra;
|
||
description = "Cassandra service user";
|
||
};
|
||
extraGroups.${defaultUser}.gid = config.ids.gids.cassandra;
|
||
};
|
||
|
||
systemd.services.cassandra =
|
||
{ description = "Apache Cassandra service";
|
||
after = [ "network.target" ];
|
||
environment =
|
||
{ CASSANDRA_CONF = "${cassandraEtc}";
|
||
JVM_OPTS = builtins.concatStringsSep " " fullJvmOptions;
|
||
MAX_HEAP_SIZE = toString cfg.maxHeapSize;
|
||
HEAP_NEWSIZE = toString cfg.heapNewSize;
|
||
MALLOC_ARENA_MAX = toString cfg.mallocArenaMax;
|
||
LOCAL_JMX = if cfg.remoteJmx then "no" else "yes";
|
||
JMX_PORT = toString cfg.jmxPort;
|
||
};
|
||
wantedBy = [ "multi-user.target" ];
|
||
serviceConfig =
|
||
{ User = cfg.user;
|
||
Group = cfg.group;
|
||
ExecStart = "${cfg.package}/bin/cassandra -f";
|
||
SuccessExitStatus = 143;
|
||
};
|
||
};
|
||
|
||
systemd.services.cassandra-full-repair =
|
||
{ description = "Perform a full repair on this Cassandra node";
|
||
after = [ "cassandra.service" ];
|
||
requires = [ "cassandra.service" ];
|
||
serviceConfig =
|
||
{ User = cfg.user;
|
||
Group = cfg.group;
|
||
ExecStart =
|
||
lib.concatStringsSep " "
|
||
([ "${cfg.package}/bin/nodetool" "repair" "--full"
|
||
] ++ cfg.fullRepairOptions);
|
||
};
|
||
};
|
||
systemd.timers.cassandra-full-repair =
|
||
mkIf (cfg.fullRepairInterval != null) {
|
||
description = "Schedule full repairs on Cassandra";
|
||
wantedBy = [ "timers.target" ];
|
||
timerConfig =
|
||
{ OnBootSec = cfg.fullRepairInterval;
|
||
OnUnitActiveSec = cfg.fullRepairInterval;
|
||
Persistent = true;
|
||
};
|
||
};
|
||
|
||
systemd.services.cassandra-incremental-repair =
|
||
{ description = "Perform an incremental repair on this cassandra node.";
|
||
after = [ "cassandra.service" ];
|
||
requires = [ "cassandra.service" ];
|
||
serviceConfig =
|
||
{ User = cfg.user;
|
||
Group = cfg.group;
|
||
ExecStart =
|
||
lib.concatStringsSep " "
|
||
([ "${cfg.package}/bin/nodetool" "repair"
|
||
] ++ cfg.incrementalRepairOptions);
|
||
};
|
||
};
|
||
systemd.timers.cassandra-incremental-repair =
|
||
mkIf (cfg.incrementalRepairInterval != null) {
|
||
description = "Schedule incremental repairs on Cassandra";
|
||
wantedBy = [ "timers.target" ];
|
||
timerConfig =
|
||
{ OnBootSec = cfg.incrementalRepairInterval;
|
||
OnUnitActiveSec = cfg.incrementalRepairInterval;
|
||
Persistent = true;
|
||
};
|
||
};
|
||
};
|
||
}
|