Add monitors.d directory + config to default configuration (#9004)

This makes heartbeat much easier to use by default, and less confusing in terms of where/how
to create this directory.

CHANGELOG.asciidoc

@@ -51,6 +51,8 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 
 *Heartbeat*
 
+- Made monitors.d configuration part of the default config. {pull}9004[9004]
+
 *Journalbeat*
 
 *Metricbeat*

dev-tools/mage/pkg.go

@@ -97,8 +97,9 @@ func (b packageBuilder) Build() error {
 }
 
 type testPackagesParams struct {
-	HasModules  bool
-	HasModulesD bool
+	HasModules   bool
+	HasMonitorsD bool
+	HasModulesD  bool
 }
 
 // TestPackagesOption defines a option to the TestPackages target.
@@ -111,6 +112,13 @@ func WithModules() func(params *testPackagesParams) {
 	}
 }
 
+// WithMonitorsD enables monitors folder contents testing.
+func WithMonitorsD() func(params *testPackagesParams) {
+	return func(params *testPackagesParams) {
+		params.HasMonitorsD = true
+	}
+}
+
 // WithModulesD enables modules.d folder contents testing
 func WithModulesD() func(params *testPackagesParams) {
 	return func(params *testPackagesParams) {
@@ -140,6 +148,10 @@ func TestPackages(options ...TestPackagesOption) error {
 		args = append(args, "--modules")
 	}
 
+	if params.HasMonitorsD {
+		args = append(args, "--monitors.d")
+	}
+
 	if params.HasModulesD {
 		args = append(args, "--modules.d")
 	}

dev-tools/packaging/package_test.go

@@ -55,13 +55,15 @@ var (
 	modulesDirPattern      = regexp.MustCompile(`module/.+`)
 	modulesDDirPattern     = regexp.MustCompile(`modules.d/$`)
 	modulesDFilePattern    = regexp.MustCompile(`modules.d/.+`)
+	monitorsDFilePattern   = regexp.MustCompile(`monitors.d/.+`)
 	systemdUnitFilePattern = regexp.MustCompile(`/lib/systemd/system/.*\.service`)
 )
 
 var (
-	files    = flag.String("files", "../build/distributions/*/*", "filepath glob containing package files")
-	modules  = flag.Bool("modules", false, "check modules folder contents")
-	modulesd = flag.Bool("modules.d", false, "check modules.d folder contents")
+	files     = flag.String("files", "../build/distributions/*/*", "filepath glob containing package files")
+	modules   = flag.Bool("modules", false, "check modules folder contents")
+	modulesd  = flag.Bool("modules.d", false, "check modules.d folder contents")
+	monitorsd = flag.Bool("monitors.d", false, "check monitors.d folder contents")
 )
 
 func TestRPM(t *testing.T) {
@@ -117,6 +119,7 @@ func checkRPM(t *testing.T, file string) {
 	checkModulesPermissions(t, p)
 	checkModulesPresent(t, "/usr/share", p)
 	checkModulesDPresent(t, "/etc/", p)
+	checkMonitorsDPresent(t, "/etc", p)
 	checkModulesOwner(t, p)
 	checkSystemdUnitPermissions(t, p)
 }
@@ -134,6 +137,7 @@ func checkDeb(t *testing.T, file string, buf *bytes.Buffer) {
 	checkManifestOwner(t, p)
 	checkModulesPresent(t, "./usr/share", p)
 	checkModulesDPresent(t, "./etc/", p)
+	checkMonitorsDPresent(t, "./etc/", p)
 	checkModulesPermissions(t, p)
 	checkModulesOwner(t, p)
 	checkSystemdUnitPermissions(t, p)
@@ -316,6 +320,12 @@ func checkModulesDPresent(t *testing.T, prefix string, p *packageFile) {
 	}
 }
 
+func checkMonitorsDPresent(t *testing.T, prefix string, p *packageFile) {
+	if *monitorsd {
+		checkMonitors(t, "monitors.d", prefix, monitorsDFilePattern, p)
+	}
+}
+
 func checkModules(t *testing.T, name, prefix string, r *regexp.Regexp, p *packageFile) {
 	t.Run(fmt.Sprintf("%s %s contents", p.Name, name), func(t *testing.T) {
 		minExpectedModules := 4
@@ -333,6 +343,23 @@ func checkModules(t *testing.T, name, prefix string, r *regexp.Regexp, p *packag
 	})
 }
 
+func checkMonitors(t *testing.T, name, prefix string, r *regexp.Regexp, p *packageFile) {
+	t.Run(fmt.Sprintf("%s %s contents", p.Name, name), func(t *testing.T) {
+		minExpectedModules := 1
+		total := 0
+		for _, entry := range p.Contents {
+			if strings.HasPrefix(entry.File, prefix) && r.MatchString(entry.File) {
+				total++
+			}
+		}
+
+		if total < minExpectedModules {
+			t.Errorf("not enough monitors found under %s: actual=%d, expected>=%d",
+				name, total, minExpectedModules)
+		}
+	})
+}
+
 func checkDockerEntryPoint(t *testing.T, p *packageFile, info *dockerInfo) {
 	expectedMode := os.FileMode(0755)
 

heartbeat/_meta/beat.docker.yml

@@ -1,3 +1,14 @@
+# Define a directory to load monitor definitions from. Definitions take the form
+# of individual yaml files.
+heartbeat.config.monitors:
+  # Directory + glob pattern to search for configuration files
+  path: ${path.config}/monitors.d/*.yml
+  # If enabled, heartbeat will periodically check the config.monitors path for changes
+  reload.enabled: false
+  # How often to check for changes
+  reload.period: 5s
+
+
 heartbeat.monitors:
 - type: http
   schedule: '@every 5s'

heartbeat/_meta/beat.reference.yml

@@ -9,6 +9,17 @@
 
 ############################# Heartbeat ######################################
 
+
+# Define a directory to load monitor definitions from. Definitions take the form
+# of individual yaml files.
+heartbeat.config.monitors:
+  # Directory + glob pattern to search for configuration files
+  path: ${path.config}/monitors.d/*.yml
+  # If enabled, heartbeat will periodically check the config.monitors path for changes
+  reload.enabled: false
+  # How often to check for changes
+  reload.period: 5s
+
 # Configure monitors
 heartbeat.monitors:
 - type: icmp # monitor type `icmp` (requires root) uses ICMP Echo Request to ping

heartbeat/_meta/beat.yml

@@ -9,7 +9,17 @@
 
 ############################# Heartbeat ######################################
 
-# Configure monitors
+# Define a directory to load monitor definitions from. Definitions take the form
+# of individual yaml files.
+heartbeat.config.monitors:
+  # Directory + glob pattern to search for configuration files
+  path: ${path.config}/monitors.d/*.yml
+  # If enabled, heartbeat will periodically check the config.monitors path for changes
+  reload.enabled: false
+  # How often to check for changes
+  reload.period: 5s
+
+# Configure monitors inline
 heartbeat.monitors:
 - type: http
 

heartbeat/heartbeat.docker.yml

@@ -1,3 +1,14 @@
+# Define a directory to load monitor definitions from. Definitions take the form
+# of individual yaml files.
+heartbeat.config.monitors:
+  # Directory + glob pattern to search for configuration files
+  path: ${path.config}/monitors.d/*.yml
+  # If enabled, heartbeat will periodically check the config.monitors path for changes
+  reload.enabled: false
+  # How often to check for changes
+  reload.period: 5s
+
+
 heartbeat.monitors:
 - type: http
   schedule: '@every 5s'

heartbeat/heartbeat.reference.yml

@@ -9,6 +9,17 @@
 
 ############################# Heartbeat ######################################
 
+
+# Define a directory to load monitor definitions from. Definitions take the form
+# of individual yaml files.
+heartbeat.config.monitors:
+  # Directory + glob pattern to search for configuration files
+  path: ${path.config}/monitors.d/*.yml
+  # If enabled, heartbeat will periodically check the config.monitors path for changes
+  reload.enabled: false
+  # How often to check for changes
+  reload.period: 5s
+
 # Configure monitors
 heartbeat.monitors:
 - type: icmp # monitor type `icmp` (requires root) uses ICMP Echo Request to ping

heartbeat/heartbeat.yml

@@ -9,7 +9,17 @@
 
 ############################# Heartbeat ######################################
 
-# Configure monitors
+# Define a directory to load monitor definitions from. Definitions take the form
+# of individual yaml files.
+heartbeat.config.monitors:
+  # Directory + glob pattern to search for configuration files
+  path: ${path.config}/monitors.d/*.yml
+  # If enabled, heartbeat will periodically check the config.monitors path for changes
+  reload.enabled: false
+  # How often to check for changes
+  reload.period: 5s
+
+# Configure monitors inline
 heartbeat.monitors:
 - type: http
 

heartbeat/magefile.go

@@ -90,7 +90,7 @@ func Package() {
 
 // TestPackages tests the generated packages (i.e. file modes, owners, groups).
 func TestPackages() error {
-	return mage.TestPackages()
+	return mage.TestPackages(mage.WithMonitorsD())
 }
 
 // Update updates the generated files (aka make update).
@@ -118,11 +118,23 @@ func GoTestIntegration(ctx context.Context) error {
 }
 
 func customizePackaging() {
+	monitorsDTarget := "monitors.d"
+	unixMonitorsDir := "/etc/{{.BeatName}}/monitors.d"
+	monitorsD := mage.PackageFile{
+		Mode:   0644,
+		Source: "monitors.d",
+	}
+
 	for _, args := range mage.Packages {
 		pkgType := args.Types[0]
 		switch pkgType {
 		case mage.Docker:
 			args.Spec.ExtraVar("linux_capabilities", "cap_net_raw=eip")
+			args.Spec.Files[monitorsDTarget] = monitorsD
+		case mage.TarGz, mage.Zip:
+			args.Spec.Files[monitorsDTarget] = monitorsD
+		case mage.Deb, mage.RPM, mage.DMG:
+			args.Spec.Files[unixMonitorsDir] = monitorsD
 		}
 	}
 }

heartbeat/monitors.d/sample.http.yml.disabled

@@ -0,0 +1,91 @@
+# These files contain a list of monitor configurations identical
+# to the heartbeat.monitors section in heartbeat.yml
+# The .example extension on this file must be removed for it to
+# be loaded.
+
+- type: http # monitor type `http`. Connect via HTTP an optionally verify response
+
+  # Monitor name used for job name and document type
+  #name: http
+
+  # Enable/Disable monitor
+  #enabled: true
+
+  # Configure task schedule
+  schedule: '@every 5s' # every 5 seconds from start of beat
+
+  # Configure URLs to ping
+  urls: ["http://localhost:9200"]
+
+  # Configure IP protocol types to ping on if hostnames are configured.
+  # Ping all resolvable IPs if `mode` is `all`, or only one IP if `mode` is `any`.
+  ipv4: true
+  ipv6: true
+  mode: any
+
+    # Configure file json file to be watched for changes to the monitor:
+    #watch.poll_file:
+    # Path to check for updates.
+    #path:
+
+    # Interval between file file changed checks.
+    #interval: 5s
+
+    # Optional HTTP proxy url.
+    #proxy_url: ''
+
+    # Total test connection and data exchange timeout
+    #timeout: 16s
+
+    # Optional Authentication Credentials
+    #username: ''
+    #password: ''
+
+    # TLS/SSL connection settings for use with HTTPS endpoint. If not configured
+    # system defaults will be used.
+    #ssl:
+    # Certificate Authorities
+    #certificate_authorities: ['']
+
+    # Required TLS protocols
+    #supported_protocols: ["TLSv1.0", "TLSv1.1", "TLSv1.2"]
+
+    # Request settings:
+    #check.request:
+    # Configure HTTP method to use. Only 'HEAD', 'GET' and 'POST' methods are allowed.
+    #method: "GET"
+
+    # Dictionary of additional HTTP headers to send:
+    #headers:
+
+    # Optional request body content
+    #body:
+
+    # Expected response settings
+    #check.response:
+    # Expected status code. If not configured or set to 0 any status code not
+    # being 404 is accepted.
+    #status: 0
+
+    # Required response headers.
+    #headers:
+
+    # Required response contents.
+    #body:
+
+    # Parses the body as JSON, then checks against the given condition expression
+    #json:
+    #- description: Explanation of what the check does
+    #  condition:
+    #    equals:
+    #      myField: expectedValue
+
+
+    # NOTE: THIS FEATURE IS DEPRECATED AND WILL BE REMOVED IN A FUTURE RELEASE
+    # Configure file json file to be watched for changes to the monitor:
+    #watch.poll_file:
+    # Path to check for updates.
+    #path:
+
+    # Interval between file file changed checks.
+  #interval: 5s