From 5da14042f70711ea5cf66e034699730335462f66 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 5 May 2024 14:08:03 +0200
Subject: Merging upstream version 1.45.3+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../go.d.plugin/agent/hostinfo/hostinfo.go         | 39 ++++++++++++++++++++
 .../go.d.plugin/agent/hostinfo/hostinfo_common.go  |  7 ++++
 .../go.d.plugin/agent/hostinfo/hostinfo_linux.go   | 42 ++++++++++++++++++++++
 3 files changed, 88 insertions(+)
 create mode 100644 src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo.go
 create mode 100644 src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo_common.go
 create mode 100644 src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo_linux.go

(limited to 'src/go/collectors/go.d.plugin/agent/hostinfo')

diff --git a/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo.go b/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo.go
new file mode 100644
index 000000000..48508a1c8
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo.go
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package hostinfo
+
+import (
+	"bytes"
+	"context"
+	"os"
+	"os/exec"
+	"time"
+)
+
+var Hostname = getHostname()
+
+func getHostname() string {
+	path, err := exec.LookPath("hostname")
+	if err != nil {
+		return ""
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
+	defer cancel()
+
+	bs, err := exec.CommandContext(ctx, path).Output()
+	if err != nil {
+		return ""
+	}
+
+	return string(bytes.TrimSpace(bs))
+}
+
+var (
+	envKubeHost = os.Getenv("KUBERNETES_SERVICE_HOST")
+	envKubePort = os.Getenv("KUBERNETES_SERVICE_PORT")
+)
+
+func IsInsideK8sCluster() bool {
+	return envKubeHost != "" && envKubePort != ""
+}
diff --git a/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo_common.go b/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo_common.go
new file mode 100644
index 000000000..69bbf5c78
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo_common.go
@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+//go:build !linux
+
+package hostinfo
+
+var SystemdVersion int
diff --git a/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo_linux.go b/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo_linux.go
new file mode 100644
index 000000000..db2005f00
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/agent/hostinfo/hostinfo_linux.go
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+//go:build linux
+
+package hostinfo
+
+import (
+	"context"
+	"regexp"
+	"strconv"
+
+	"github.com/coreos/go-systemd/v22/dbus"
+)
+
+var SystemdVersion = getSystemdVersion()
+
+func getSystemdVersion() int {
+	var reVersion = regexp.MustCompile(`[0-9][0-9][0-9]`)
+
+	conn, err := dbus.NewWithContext(context.Background())
+	if err != nil {
+		return 0
+	}
+	defer conn.Close()
+
+	version, err := conn.GetManagerProperty("Version")
+	if err != nil {
+		return 0
+	}
+
+	major := reVersion.FindString(version)
+	if major == "" {
+		return 0
+	}
+
+	ver, err := strconv.Atoi(major)
+	if err != nil {
+		return 0
+	}
+
+	return ver
+}
-- 
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