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https://github.com/prometheus/prometheus.git
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Promtool: Validate service discovery files (#8950)
* Check SD files in promtool Signed-off-by: Levi Harrison <git@leviharrison.dev>
This commit is contained in:
parent
fd6c852567
commit
ca1896c15b
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@ -18,6 +18,7 @@ import (
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"context"
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"context"
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"encoding/json"
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"encoding/json"
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"fmt"
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"fmt"
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"io/ioutil"
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"math"
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"math"
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"net/http"
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"net/http"
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"net/url"
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"net/url"
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@ -40,11 +41,13 @@ import (
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"github.com/prometheus/common/version"
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"github.com/prometheus/common/version"
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"github.com/prometheus/exporter-toolkit/web"
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"github.com/prometheus/exporter-toolkit/web"
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"gopkg.in/alecthomas/kingpin.v2"
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"gopkg.in/alecthomas/kingpin.v2"
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yaml "gopkg.in/yaml.v2"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/discovery/file"
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"github.com/prometheus/prometheus/discovery/file"
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_ "github.com/prometheus/prometheus/discovery/install" // Register service discovery implementations.
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_ "github.com/prometheus/prometheus/discovery/install" // Register service discovery implementations.
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"github.com/prometheus/prometheus/discovery/kubernetes"
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"github.com/prometheus/prometheus/discovery/kubernetes"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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"github.com/prometheus/prometheus/pkg/rulefmt"
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"github.com/prometheus/prometheus/pkg/rulefmt"
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)
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)
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@ -337,8 +340,12 @@ func checkConfig(filename string) ([]string, error) {
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return nil, err
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return nil, err
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}
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}
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if len(files) != 0 {
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if len(files) != 0 {
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// There was at least one match for the glob and we can assume checkFileExists
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for _, f := range files {
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// for all matches would pass, we can continue the loop.
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err = checkSDFile(f)
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if err != nil {
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return nil, errors.Errorf("checking SD file %q: %v", file, err)
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}
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}
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continue
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continue
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}
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}
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fmt.Printf(" WARNING: file %q for file_sd in scrape job %q does not exist\n", file, scfg.JobName)
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fmt.Printf(" WARNING: file %q for file_sd in scrape job %q does not exist\n", file, scfg.JobName)
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@ -368,6 +375,42 @@ func checkTLSConfig(tlsConfig config_util.TLSConfig) error {
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return nil
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return nil
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}
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}
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func checkSDFile(filename string) error {
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fd, err := os.Open(filename)
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if err != nil {
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return err
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}
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defer fd.Close()
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content, err := ioutil.ReadAll(fd)
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if err != nil {
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return err
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}
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var targetGroups []*targetgroup.Group
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switch ext := filepath.Ext(filename); strings.ToLower(ext) {
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case ".json":
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if err := json.Unmarshal(content, &targetGroups); err != nil {
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return err
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}
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case ".yml", ".yaml":
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if err := yaml.UnmarshalStrict(content, &targetGroups); err != nil {
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return err
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}
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default:
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return errors.Errorf("invalid file extension: %q", ext)
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}
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for i, tg := range targetGroups {
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if tg == nil {
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return errors.Errorf("nil target group item found (index %d)", i)
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}
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}
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return nil
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}
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// CheckRules validates rule files.
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// CheckRules validates rule files.
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func CheckRules(files ...string) int {
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func CheckRules(files ...string) int {
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failed := false
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failed := false
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@ -77,3 +77,44 @@ func mockServer(code int, body string) (*httptest.Server, func() *http.Request)
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}
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}
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return server, f
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return server, f
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}
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}
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func TestCheckSDFile(t *testing.T) {
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cases := []struct {
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name string
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file string
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err string
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}{
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{
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name: "good .yml",
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file: "./testdata/good-sd-file.yml",
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},
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{
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name: "good .yaml",
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file: "./testdata/good-sd-file.yaml",
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},
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{
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name: "good .json",
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file: "./testdata/good-sd-file.json",
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},
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{
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name: "bad file extension",
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file: "./testdata/bad-sd-file-extension.nonexistant",
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err: "invalid file extension: \".nonexistant\"",
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},
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{
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name: "bad format",
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file: "./testdata/bad-sd-file-format.yml",
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err: "yaml: unmarshal errors:\n line 1: field targats not found in type struct { Targets []string \"yaml:\\\"targets\\\"\"; Labels model.LabelSet \"yaml:\\\"labels\\\"\" }",
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},
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}
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for _, test := range cases {
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t.Run(test.name, func(t *testing.T) {
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err := checkSDFile(test.file)
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if test.err != "" {
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require.Equalf(t, test.err, err.Error(), "Expected error %q, got %q", test.err, err.Error())
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return
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}
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require.NoError(t, err)
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})
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}
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}
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0
cmd/promtool/testdata/bad-sd-file-extension.nonexistant
vendored
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0
cmd/promtool/testdata/bad-sd-file-extension.nonexistant
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2
cmd/promtool/testdata/bad-sd-file-format.yml
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2
cmd/promtool/testdata/bad-sd-file-format.yml
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@ -0,0 +1,2 @@
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- targats:
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- localhost:9100
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8
cmd/promtool/testdata/good-sd-file.json
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8
cmd/promtool/testdata/good-sd-file.json
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@ -0,0 +1,8 @@
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[
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{
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"labels": {
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"job": "node"
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},
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"targets": ["localhost:9100"]
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}
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]
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4
cmd/promtool/testdata/good-sd-file.yaml
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4
cmd/promtool/testdata/good-sd-file.yaml
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@ -0,0 +1,4 @@
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- labels:
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job: node
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- targets:
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- localhost:9100
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4
cmd/promtool/testdata/good-sd-file.yml
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4
cmd/promtool/testdata/good-sd-file.yml
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@ -0,0 +1,4 @@
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- labels:
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job: node
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- targets:
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- localhost:9100
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