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/metrics: Add newline at the end to be spec compliant 

Fixes #909: Error trying to parse /metrics

See also https://prometheus.io/docs/instrumenting/exposition_formats/#text-format-details
This commit is contained in:
Igor Scheller 2022-05-11 00:25:20 +02:00
parent b842466b3a
commit d690d64d0e
2 changed files with 15 additions and 10 deletions
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2
src/Controllers/Metrics/MetricsEngine.php
View File

@ -57,7 +57,7 @@ class MetricsEngine implements EngineInterface
}
}
return implode("\n", $return);
return implode("\n", $return) . "\n";
}
/**

23
tests/Unit/Controllers/Metrics/MetricsEngineTest.php
View File

@ -19,28 +19,28 @@ class MetricsEngineTest extends TestCase
{
$engine = new MetricsEngine();
$this->assertEquals('', $engine->get('/metrics'));
$this->assertEquals("\n", $engine->get('/metrics'));
$this->assertEquals('engelsystem_users 13', $engine->get('/metrics', ['users' => 13]));
$this->assertEquals("engelsystem_users 13\n", $engine->get('/metrics', ['users' => 13]));
$this->assertEquals('engelsystem_bool_val 0', $engine->get('/metrics', ['bool_val' => false]));
$this->assertEquals("engelsystem_bool_val 0\n", $engine->get('/metrics', ['bool_val' => false]));
$this->assertEquals('# Lorem \n Ipsum', $engine->get('/metrics', ["Lorem \n Ipsum"]));
$this->assertEquals('# Lorem \n Ipsum' . "\n", $engine->get('/metrics', ["Lorem \n Ipsum"]));
$this->assertEquals(
'engelsystem_foo{lorem="ip\\\\sum"} \\"lorem\\n\\\\ipsum\\"',
'engelsystem_foo{lorem="ip\\\\sum"} \\"lorem\\n\\\\ipsum\\"' . "\n",
$engine->get('/metrics', [
'foo' => ['labels' => ['lorem' => 'ip\\sum'], 'value' => "\"lorem\n\\ipsum\""],
])
);
$this->assertEquals(
'engelsystem_foo_count{bar="14"} 42',
'engelsystem_foo_count{bar="14"} 42' . "\n",
$engine->get('/metrics', ['foo_count' => ['labels' => ['bar' => 14], 'value' => 42]])
);
$this->assertEquals(
'engelsystem_lorem{test="123"} NaN' . "\n" . 'engelsystem_lorem{test="456"} 999.99',
'engelsystem_lorem{test="123"} NaN' . "\n" . 'engelsystem_lorem{test="456"} 999.99' . "\n",
$engine->get('/metrics', [
'lorem' => [
['labels' => ['test' => 123], 'value' => 'NaN'],
@ -50,7 +50,7 @@ class MetricsEngineTest extends TestCase
);
$this->assertEquals(
"# HELP engelsystem_test Some help\\n text\n# TYPE engelsystem_test counter\nengelsystem_test 99",
"# HELP engelsystem_test Some help\\n text\n# TYPE engelsystem_test counter\nengelsystem_test 99\n",
$engine->get('/metrics', ['test' => ['help' => "Some help\n text", 'type' => 'counter', 'value' => 99]])
);
}
@ -71,6 +71,7 @@ engelsystem_test_minimum_histogram_bucket{le="3"} 4
engelsystem_test_minimum_histogram_bucket{le="+Inf"} 4
engelsystem_test_minimum_histogram_sum 1.337
engelsystem_test_minimum_histogram_count 4
EOD,
$engine->get('/metrics', [
'test_minimum_histogram' => [
@ -88,6 +89,7 @@ engelsystem_test_short_histogram_bucket{le="120"} 19
engelsystem_test_short_histogram_bucket{le="+Inf"} 300
engelsystem_test_short_histogram_sum 123.456
engelsystem_test_short_histogram_count 300
EOD,
$engine->get('/metrics', [
'test_short_histogram' => [
@ -109,6 +111,7 @@ engelsystem_test_multiple_histogram_bucket{handler="bar",le="0.2"} 0
engelsystem_test_multiple_histogram_bucket{handler="bar",le="+Inf"} 3
engelsystem_test_multiple_histogram_sum{handler="bar"} 3
engelsystem_test_multiple_histogram_count{handler="bar"} 3
EOD,
$engine->get('/metrics', [
'test_multiple_histogram' => [
@ -125,6 +128,7 @@ EOD,
engelsystem_test_minimum_histogram_bucket{le="+Inf"} NaN
engelsystem_test_minimum_histogram_sum NaN
engelsystem_test_minimum_histogram_count NaN
EOD,
$engine->get('/metrics', [
'test_minimum_histogram' => [
@ -154,6 +158,7 @@ EOD,
$engine = new MetricsEngine();
$engine->share('foo', 42);
$this->assertEquals('', $engine->get('/metrics'));
// Just ignore it
$this->assertEquals("\n", $engine->get('/metrics'));
}
}