Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

[Filebeat] backwards compatibility for set processor #20908

Merged
merged 3 commits into from
Sep 3, 2020
Merged

[Filebeat] backwards compatibility for set processor #20908

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
84cc638
backwards compatibility for set processor
leehinman Sep 1, 2020
0233ae7
incorporate feedback
leehinman Sep 2, 2020
0799f01
update changelog
leehinman Sep 2, 2020
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions CHANGELOG.next.asciidoc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -256,6 +256,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
- Fix long registry migration times. {pull}20717[20717] {issue}20705[20705]
- Fix event types and categories in auditd module to comply with ECS {pull}20652[20652]
- Update documentation in the azure module filebeat. {pull}20815[20815]
- Provide backwards compatibility for the `set` processor when Elasticsearch is less than 7.9.0. {pull}20908[20908]

*Heartbeat*

Expand Down
59 changes: 59 additions & 0 deletions filebeat/fileset/pipelines.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -127,6 +127,11 @@ func loadPipeline(esClient PipelineLoader, pipelineID string, content map[string
return fmt.Errorf("failed to adapt pipeline for ECS compatibility: %v", err)
}

err = modifySetProcessor(esClient.GetVersion(), pipelineID, content)
if err != nil {
return fmt.Errorf("failed to modify set processor in pipeline: %v", err)
}

body, err := esClient.LoadJSON(path, content)
if err != nil {
return interpretError(err, body)
Expand Down Expand Up @@ -232,3 +237,57 @@ func interpretError(initialErr error, body []byte) error {

return fmt.Errorf("couldn't load pipeline: %v. Response body: %s", initialErr, body)
}

// modifySetProcessor replaces ignore_empty_value option with an if statement
// so ES less than 7.9 will still work
func modifySetProcessor(esVersion common.Version, pipelineID string, content map[string]interface{}) error {
flagVersion := common.MustNewVersion("7.9.0")
if !esVersion.LessThan(flagVersion) {
return nil
}

p, ok := content["processors"]
if !ok {
return nil
}
processors, ok := p.([]interface{})
if !ok {
return fmt.Errorf("'processors' in pipeline '%s' expected to be a list, found %T", pipelineID, p)
}

for _, p := range processors {
processor, ok := p.(map[string]interface{})
if !ok {
continue
}
if options, ok := processor["set"].(map[string]interface{}); ok {
_, ok := options["ignore_empty_value"].(bool)
if !ok {
// don't have ignore_empty_value nothing to do
continue
}

logp.Debug("modules", "In pipeline %q removing unsupported 'ignore_empty_value' in set processor", pipelineID)
delete(options, "ignore_empty_value")

_, ok = options["if"].(string)
if ok {
// assume if check is sufficient
continue
}
val, ok := options["value"].(string)
if !ok {
continue
}

newIf := strings.TrimLeft(val, "{ ")
newIf = strings.TrimRight(newIf, "} ")
newIf = strings.ReplaceAll(newIf, ".", "?.")
newIf = "ctx?." + newIf + " != null"

logp.Debug("modules", "In pipeline %q adding if %s to replace 'ignore_empty_value' in set processor", pipelineID, newIf)
options["if"] = newIf
}
}
return nil
}
177 changes: 177 additions & 0 deletions filebeat/fileset/pipelines_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -215,3 +215,180 @@ func TestSetEcsProcessors(t *testing.T) {
})
}
}

func TestModifySetProcessor(t *testing.T) {
cases := []struct {
name string
esVersion *common.Version
content map[string]interface{}
expected map[string]interface{}
isErrExpected bool
}{
{
name: "ES < 7.9.0",
esVersion: common.MustNewVersion("7.8.0"),
content: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"ignore_empty_value": true,
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

How about a test case for when the pipeline already has an if and it has ignore_empty_value. Perhaps it should just drop the ignore_empty_value in that case?

},
},
}},
expected: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"if": "ctx?.panw?.panos?.ruleset != null",
},
},
},
},
isErrExpected: false,
},
{
name: "ES == 7.9.0",
esVersion: common.MustNewVersion("7.9.0"),
content: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"ignore_empty_value": true,
},
},
}},
expected: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"ignore_empty_value": true,
},
},
},
},
isErrExpected: false,
},
{
name: "ES > 7.9.0",
esVersion: common.MustNewVersion("8.0.0"),
content: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"ignore_empty_value": true,
},
},
}},
expected: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"ignore_empty_value": true,
},
},
},
},
isErrExpected: false,
},
{
name: "existing if",
esVersion: common.MustNewVersion("7.7.7"),
content: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"ignore_empty_value": true,
"if": "ctx?.panw?.panos?.ruleset != null",
},
},
}},
expected: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"if": "ctx?.panw?.panos?.ruleset != null",
},
},
}},
isErrExpected: false,
},
{
name: "ignore_empty_value is false",
esVersion: common.MustNewVersion("7.7.7"),
content: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"ignore_empty_value": false,
"if": "ctx?.panw?.panos?.ruleset != null",
},
},
}},
expected: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"value": "{{panw.panos.ruleset}}",
"if": "ctx?.panw?.panos?.ruleset != null",
},
},
}},
isErrExpected: false,
},
{
name: "no value",
esVersion: common.MustNewVersion("7.7.7"),
content: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
"ignore_empty_value": false,
},
},
}},
expected: map[string]interface{}{
"processors": []interface{}{
map[string]interface{}{
"set": map[string]interface{}{
"field": "rule.name",
},
},
}},
isErrExpected: false,
},
}

for _, test := range cases {
test := test
t.Run(test.name, func(t *testing.T) {
t.Parallel()
err := modifySetProcessor(*test.esVersion, "foo-pipeline", test.content)
if test.isErrExpected {
assert.Error(t, err)
} else {
assert.NoError(t, err)
assert.Equal(t, test.expected, test.content, test.name)
}
})
}
}