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nixos/datadog-agent: Add option to configure datadog integrations 

Introduces an option `services.datadog-agent.extraIntegrations` that
can be set to include additional Datadog agent integrations from the
integrations-core repository.

Documentation and an example is provided with the change.

Relates to NixOS/nixpkgs#40399
This commit is contained in:
Vincent Ambo 2018-08-09 16:01:12 +02:00
parent 924016f45f
commit 5b748bd8fa
1 changed files with 38 additions and 10 deletions
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48
nixos/modules/services/monitoring/datadog-agent.nix
View File

@ -38,6 +38,12 @@ let
target = "datadog-agent/datadog.yaml";
}] ++ makeCheckConfigs (cfg.checks // defaultChecks);
# Apply the configured extraIntegrations to the provided agent
# package. See the documentation of `dd-agent/integrations-core.nix`
# for detailed information on this.
datadogPkg = cfg.package.overrideAttrs(_: {
python = (pkgs.datadog-integrations-core cfg.extraIntegrations).python;
});
in {
options.services.datadog-agent = {
enable = mkOption {
@ -52,9 +58,10 @@ in {
default = pkgs.datadog-agent;
defaultText = "pkgs.datadog-agent";
description = ''
Which DataDog v6 agent package to use.
Override the <literal>pythonPackages</literal> argument
of this derivation to include more checks.
Which DataDog v6 agent package to use. Note that the provided
package is expected to have an overridable `python`-attribute
which configures the Python environment with the Datadog
checks.
'';
type = types.package;
};
@ -88,6 +95,27 @@ in {
type = types.nullOr (types.enum ["DEBUG" "INFO" "WARN" "ERROR"]);
};
extraIntegrations = mkOption {
default = {};
type = types.attrs;
description = ''
Extra integrations from the Datadog core-integrations
repository that should be built and included.
By default the included integrations are disk, mongo, network,
nginx and postgres.
To include additional integrations the name of the derivation
and a function to filter its dependencies from the Python
package set must be provided.
'';
example = {
ntp = (pythonPackages: [ pythonPackages.ntplib ]);
};
};
extraConfig = mkOption {
default = {};
type = types.attrs;
@ -157,7 +185,7 @@ in {
};
};
config = mkIf cfg.enable {
environment.systemPackages = [ cfg.package pkgs.sysstat pkgs.procps ];
environment.systemPackages = [ datadogPkg pkgs.sysstat pkgs.procps ];
users.extraUsers.datadog = {
description = "Datadog Agent User";
@ -171,7 +199,7 @@ in {
systemd.services = let
makeService = attrs: recursiveUpdate {
path = [ cfg.package pkgs.python pkgs.sysstat pkgs.procps ];
path = [ datadogPkg pkgs.python pkgs.sysstat pkgs.procps ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
User = "datadog";
@ -180,7 +208,7 @@ in {
RestartSec = 2;
PrivateTmp = true;
};
restartTriggers = [ cfg.package ] ++ map (etc: etc.source) etcfiles;
restartTriggers = [ datadogPkg ] ++ map (etc: etc.source) etcfiles;
} attrs;
in {
datadog-agent = makeService {
@ -190,16 +218,16 @@ in {
rm -f /etc/datadog-agent/auth_token
'';
script = ''
export DD_API_KEY=$(head -n1 ${cfg.apiKeyFile})
exec ${cfg.package}/bin/agent start -c /etc/datadog-agent/datadog.yaml
export DD_API_KEY=$(head -n 1 ${cfg.apiKeyFile})
exec ${datadogPkg}/bin/agent start -c /etc/datadog-agent/datadog.yaml
'';
serviceConfig.PermissionsStartOnly = true;
};
dd-jmxfetch = lib.mkIf (lib.hasAttr "jmx" cfg.checks) (makeService {
description = "Datadog JMX Fetcher";
path = [ cfg.package pkgs.python pkgs.sysstat pkgs.procps pkgs.jdk ];
serviceConfig.ExecStart = "${cfg.package}/bin/dd-jmxfetch";
path = [ datadogPkg pkgs.python pkgs.sysstat pkgs.procps pkgs.jdk ];
serviceConfig.ExecStart = "${datadogPkg}/bin/dd-jmxfetch";
});
};