feat: Add check_ping

Signed-off-by: Julien Riou <julien@riou.xyz>

README.md

@@ -14,6 +14,21 @@ pip install -r requirements.txt
 
 Create OVHcloud API tokens following [this guide](https://github.com/ovh/python-ovh).
 
+# check_ping
+
+Ensures basic configuration has succeeded. This command can be defined as
+dependency of all other ones.
+
+```
+./check_ping --help
+```
+
+Example of configuration:
+
+```
+command[check_ping]=/opt/check_ovhcloud/check_ping
+```
+
 # check_voip
 
 For each VoIP lines associated to the account, detect the last registration time:

VERSION

@@ -1 +1 @@
-1.0.0
+1.1.0

check_ping

@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+
+import argparse
+import logging
+import sys
+import ovh
+
+from lib import setup_logging, show_version, BooleanContext
+
+from nagiosplugin import (
+    Check,
+    Metric,
+    Resource,
+    Summary,
+)
+from nagiosplugin.state import Unknown
+
+logger = logging.getLogger(__name__)
+
+
+def parse_arguments():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "-v",
+        "--verbose",
+        dest="loglevel",
+        action="store_const",
+        const=logging.INFO,
+        help="Print more output",
+    )
+    parser.add_argument(
+        "-d",
+        "--debug",
+        dest="loglevel",
+        action="store_const",
+        const=logging.DEBUG,
+        default=logging.WARNING,
+        help="Print even more output",
+    )
+
+    parser.add_argument(
+        "--version",
+        dest="show_version",
+        action="store_true",
+        help="Print version and exit",
+    )
+
+    args = parser.parse_args()
+    return args
+
+
+class Ping(Resource):
+    def __init__(self, client):
+        self.client = client
+
+    def probe(self):
+        try:
+            me = self.client.get(f"/me")
+            return [Metric(me["firstname"], True, context="ping")]
+        except Exception as err:
+            return [Metric(str(err), False, context="ping")]
+
+
+def main():
+    args = parse_arguments()
+    setup_logging(args)
+
+    if args.show_version:
+        show_version()
+        return
+
+    try:
+        check = Check(
+            Ping(client=ovh.Client()),
+            BooleanContext("ping", expected=True, critical=True),
+            Summary(),
+        )
+        check.main()
+    except Exception as err:
+        print(f"Failed to execute check: {str(err)}")
+        logger.debug(err, exc_info=True)
+        sys.exit(Unknown.code)
+
+
+if __name__ == "__main__":
+    main()

check_voip

@@ -15,7 +15,7 @@ from nagiosplugin import (
     ScalarContext,
     Summary,
 )
-from nagiosplugin.state import Critical, Ok, Unknown, Warn
+from nagiosplugin.state import Unknown
 
 logger = logging.getLogger(__name__)
 

lib/__init__.py

@@ -1,6 +1,30 @@
 import logging
 import os
 
+from nagiosplugin import Context
+from nagiosplugin.state import Critical, Ok, Unknown, Warn
+
+
+class BooleanContext(Context):
+    def __init__(self, name, expected=True, warning=False, critical=False):
+        super().__init__(name)
+        self.expected = expected
+        self.warning = warning
+        self.critical = critical
+
+    def evaluate(self, metric, resource):
+        if not metric.value is self.expected:
+            result_type = Ok
+            if self.critical:
+                result_type = Critical
+            elif self.warning:
+                result_type = Warn
+            return self.result_cls(
+                result_type, f"{metric.name} is not {self.expected}", metric
+            )
+        else:
+            return self.result_cls(Ok, None, metric)
+
 
 def show_version():
     with open(