Add netutils charm layer

Signed-off-by: Adam Israel <adam.israel@canonical.com>

layers/netutils/LICENSE

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layers/netutils/README.md

+# Overview
+
+This charm provides basic network utilities that can be run from a Juju-deployed
+machine.
+
+# Usage
+
+To deploy the charm:
+```bash
+$ juju deploy cs:~nfv/netutils
+```
+
+To run an action:
+```bash
+$ juju run-action netutils/0 ping destination=google.com
+$ juju run-action netutils/0 traceroute destination=google.com
+```
+
+To fetch the output of an action:
+```bash
+$ juju show-action-output 026b3d4c-0bb2-4818-8d24-9855936cdcdf
+results:
+  output: |
+    traceroute to google.com (216.58.198.78), 30 hops max, 60 byte packets
+     1  ec2-79-125-0-86.eu-west-1.compute.amazonaws.com (79.125.0.86)  1.431 ms  1.410 ms  1.380 ms
+     2  100.64.2.73 (100.64.2.73)  1.647 ms 100.64.2.103 (100.64.2.103)  1.247 ms 100.64.2.121 (100.64.2.121)  1.224 ms
+     3  100.64.0.232 (100.64.0.232)  1.296 ms 100.64.0.184 (100.64.0.184)  1.515 ms 100.64.0.234 (100.64.0.234)  1.079 ms
+     4  100.64.16.37 (100.64.16.37)  0.377 ms 100.64.16.49 (100.64.16.49)  0.347 ms 100.64.16.1 (100.64.16.1)  0.340 ms
+     5  176.32.107.12 (176.32.107.12)  0.739 ms 176.32.107.4 (176.32.107.4)  0.875 ms  0.748 ms
+     6  178.236.0.111 (178.236.0.111)  0.650 ms  0.641 ms  0.645 ms
+     7  72.14.215.85 (72.14.215.85)  0.544 ms  1.508 ms  1.498 ms
+     8  209.85.252.198 (209.85.252.198)  0.680 ms  0.659 ms  0.618 ms
+     9  64.233.174.27 (64.233.174.27)  0.690 ms  0.682 ms  0.634 ms
+    10  dub08s02-in-f14.1e100.net (216.58.198.78)  0.568 ms  0.560 ms  0.595 ms
+status: completed
+timing:
+  completed: 2016-06-29 14:50:04 +0000 UTC
+  enqueued: 2016-06-29 14:50:03 +0000 UTC
+  started: 2016-06-29 14:50:03 +0000 UTC
+```
+
+## Scale out Usage
+
+With great scalability comes great power, but please don't use this to DDoS anyone without their permission.
+
+## Known Limitations and Issues
+
+# Contact Information
+
+## Contributing to the charm
+
+  - The compiled charm can be found [here](https://www.jujucharms.com/u/nfv/netutils).
+  - [layer/netutils](https://osm.etsi.org/gitweb/?p=osm/juju-charms.git;a=summary/) contains the source of the layer.
+  - Please add any bugs or feature requests to the [bugzilla](https://osm.etsi.org/bugzilla/buglist.cgi?component=Juju-charms&list_id=426&product=OSM&resolution=---).

layers/netutils/actions.yaml

+nmap:
+  description: "nmap a thing!"
+  params:
+    destination:
+      description: "destination to scan"
+      type: string
+  required:
+    - destination
+ping:
+  description: 'ping a thing!'
+  params:
+    count:
+      description: "Stop after sending count ECHO_REQUEST packets"
+      type: integer
+      default: 30
+    destination:
+      description: "destination of ping request"
+      type: string
+  required:
+    - destination
+traceroute:
+  description: 'trace a thing!'
+  params:
+    hops:
+      description: "Stop tracing after count hops"
+      type: integer
+      default: 30
+    destination:
+      description: "destination of traceroute request"
+      type: string
+  required:
+    - destination

layers/netutils/actions/nmap

+#!/usr/bin/env python3
+import sys
+sys.path.append('lib')
+
+from charms.reactive import main
+from charms.reactive import set_state
+from charmhelpers.core.hookenv import action_fail
+
+"""
+`set_state` only works here because it's flushed to disk inside the `main()`
+loop. remove_state will need to be called inside the action method.
+"""
+set_state('actions.nmap')
+
+try:
+    main()
+except Exception as e:
+    action_fail(repr(e))

layers/netutils/actions/ping

+#!/usr/bin/env python3
+import sys
+sys.path.append('lib')
+
+from charms.reactive import main
+from charms.reactive import set_state
+from charmhelpers.core.hookenv import action_fail
+
+"""
+`set_state` only works here because it's flushed to disk inside the `main()`
+loop. remove_state will need to be called inside the action method.
+"""
+set_state('actions.ping')
+
+try:
+    main()
+except Exception as e:
+    action_fail(repr(e))

layers/netutils/actions/traceroute

+#!/usr/bin/env python3
+import sys
+sys.path.append('lib')
+
+from charms.reactive import main
+from charms.reactive import set_state
+from charmhelpers.core.hookenv import action_fail
+
+"""
+`set_state` only works here because it's flushed to disk inside the `main()`
+loop. remove_state will need to be called inside the action method.
+"""
+set_state('actions.traceroute')
+
+try:
+    main()
+except Exception as e:
+    action_fail(repr(e))

layers/netutils/icon.svg

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layers/netutils/layer.yaml

+repo: git@github.com:AdamIsrael/layer-netutils.git
+includes: ['layer:basic']  # if you use any interfaces, add them here
+options:
+  basic:
+    packages:
+      - traceroute
+      - nmap

layers/netutils/metadata.yaml

+name: netutils
+summary: A suite of network-related utilities.
+maintainer: Adam Israel <adam.israel@canonical.com>
+description: |
+  A suite of network-related utilities, such as ping and traceroute, that
+  can be deployed into a data center in order to diagnose connectivity issues.
+tags:
+  # https://jujucharms.com/docs/stable/authors-charm-metadata
+  - ops
+  - network
+  - performance
+series:
+  - trusty
+  - xenial
+subordinate: false

layers/netutils/reactive/layer_netutils.py

+from charmhelpers.core.hookenv import (
+    config,
+    status_set,
+    action_get,
+    action_set,
+    action_fail,
+    log,
+)
+
+from charms.reactive import (
+    when,
+    when_not,
+    set_state as set_flag,
+    remove_state as remove_flag,
+)
+
+import subprocess
+
+
+@when_not('netutils.ready')
+def ready():
+    status_set('active', 'Ready!')
+    set_flag('netutils.ready')
+
+
+@when('actions.nmap')
+def nmap():
+    err = ''
+    try:
+        result, err = _run('nmap {}'.format(action_get('destination')))
+    except:
+        action_fail('nmap command failed:' + err)
+    else:
+        action_set({'outout': result})
+    finally:
+        remove_flag('actions.nmap')
+
+
+@when('actions.ping')
+def ping():
+    err = ''
+    try:
+        result, err = _run('ping -qc {} {}'.format(
+            action_get('count'), action_get('destination'))
+        )
+
+    except:
+        action_fail('ping command failed:' + err)
+    else:
+        # Here you can send results back from ping, if you had time to parse it
+        action_set({'output': result})
+    finally:
+        remove_flag('actions.ping')
+
+
+
+@when('actions.traceroute')
+def traceroute():
+    try:
+        result, err = _run('traceroute -m {} {}'.format(action_get('hops'), action_get('destination')))
+    except:
+        action_fail('traceroute command failed')
+    else:
+        # Here you can send results back from ping, if you had time to parse it
+        action_set({'output': result})
+    finally:
+        remove_flag('actions.traceroute')
+
+
+
+def _run(cmd, env=None):
+    if isinstance(cmd, str):
+        cmd = cmd.split() if ' ' in cmd else [cmd]
+
+    log(cmd)
+    p = subprocess.Popen(cmd,
+                         env=env,
+                         stdout=subprocess.PIPE,
+                         stderr=subprocess.PIPE)
+    stdout, stderr = p.communicate()
+    retcode = p.poll()
+    if retcode > 0:
+        raise subprocess.CalledProcessError(returncode=retcode,
+                                            cmd=cmd,
+                                            output=stderr.decode("utf-8").strip())
+    return (stdout.decode('utf-8'), stderr.decode('utf-8'))

layers/netutils/tests/00-setup

+#!/bin/bash
+
+sudo add-apt-repository ppa:juju/stable -y
+sudo apt-get update
+sudo apt-get install amulet python-requests -y

layers/netutils/tests/10-deploy

+#!/usr/bin/python3
+
+import amulet
+import requests
+import unittest
+
+
+class TestCharm(unittest.TestCase):
+    def setUp(self):
+        self.d = amulet.Deployment()
+
+        self.d.add('layer-netutils')
+        self.d.expose('layer-netutils')
+
+        self.d.setup(timeout=900)
+        self.d.sentry.wait()
+
+        self.unit = self.d.sentry['layer-netutils'][0]
+
+    def test_service(self):
+        # test we can access over http
+        page = requests.get('http://{}'.format(self.unit.info['public-address']))
+        self.assertEqual(page.status_code, 200)
+        # Now you can use self.d.sentry[SERVICE][UNIT] to address each of the units and perform
+        # more in-depth steps. Each self.d.sentry[SERVICE][UNIT] has the following methods:
+        # - .info - An array of the information of that unit from Juju
+        # - .file(PATH) - Get the details of a file on that unit
+        # - .file_contents(PATH) - Get plain text output of PATH file from that unit
+        # - .directory(PATH) - Get details of directory
+        # - .directory_contents(PATH) - List files and folders in PATH on that unit
+        # - .relation(relation, service:rel) - Get relation data from return service