summaryrefslogtreecommitdiff
path: root/tasks/snmp_agent_uptime/task.py
blob: 2e504d643f965f87e94bfcb48bb007438116b1c9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
# SPDX-License-Identifier: AGPL-3.0-or-later

# kpov_util should be imported by add_assignment.py

# TODO: finish this.
instructions = {
    'si': '''\
<p>
Postavi tri navidezne računalnike: <em>SimpleArbiter</em>, <em>SNMPServer</em> in <em>SNMPClient</em>.

<p>
Napiši program <code>upminutes</code>, ki bo izpisal v minutah, koliko časa je racunalnik vklopljen. Postavi ga na <em>SNMPClient</em> v domači imenik uporabnika <code>test</code> z geslom <code>test</code>.

<p>
Poskrbi, da bo strežnik SNMP pod OID

<pre><code>{{SNMP_UPTIME_OID}}</code></pre>

<p>
sporočal, koliko časa je vklopljen v sekundah.

<p>
Napiši skripto, poimenovano <code>beri.sh</code>, ki prek SNMP prebere vrednost s <em>simpleArbiterDhcpGWSNMP</em> na OID 

<pre><code>{{SNMP_CLIENT_OID}}</code></pre>

<p>
kot član skupnosti <code>testers</code>. Postavi jo na <em>SNMPClient</em>, v domači imenik uporabnika <code>test</code>. Poskrbi, da bodo podatki na SNMPServer dostopni za skupino (angl. <em lang="en">community</em>) <code>studentje</code>.
''',
    'en': '''\
<p>
Set up three virtual computers: <em>SimpleArbiter</em>, <em>SNMPServer</em> and <em>SNMPClient</em>.

<p>
Write a program called <code>upminutes</code>. This program should output the uptime of the computer in minutes. Set it up on <em>SNMPClient</em> in the home directory of the user <code>test</code> with the password <code>test</code>.

<p>
Make sure that the SNMP server reports its uptime in seconds over SNMP under OID

<pre><code>{{SNMP_UPTIME_OID}}</code></pre>

<p>
Write a script called <code>beri.sh</code> that reads the value from the OID

<pre><code>{{SNMP_CLIENT_OID}}</code></pre>

<p>
on <em>simpleArbiterDhcpGWSNMP</em> as a member of the community <code>testers</code>. Set it up on <em>SNMPClient</em> in the home directory of the user <code>test</code>. Make all the data available over SNMP readable by the community <code>studentje</code>.
''',
}

computers = {
    'SNMPClient': {
        'disks': [
            {   'name': 'student-SNMPClient',

            },
        ],
        'network_interfaces': [{'network': 'net1'}],
        'flavor': 'm1.tiny',
        'config_drive': False
    },
    'SNMPServer': {
        'disks': [
            {   'name': 'student-SNMPServer',
            },
        ],
        'network_interfaces': [{'network': 'net1'}],
        'flavor': 'm1.tiny',
        'config_drive': False

    },
 
    'SimpleArbiter': {
        'disks': [
            {   'name': 'simpleArbiterDhcpGWSNMP',
            },
        ],
        'network_interfaces': [{'network': 'net1'}, {'network': 'test-net'}],
        'flavor': 'm1.tiny',
        'config_drive': False
    }
}

networks = { 'net1': {'public': False}, 'test-net': {'public': True} }

params_meta = {
    'SNMP_VALUE': {'descriptions': {'si': 'Vrednost, dostopna prek SNMP', 'en': 'The value available over SNMP'}, 'w': False, 'public':False, 'type': 'short', 'generated': True}, 
    'SNMP_UPTIME_OID': {'descriptions': {'si': 'SNMP_UPTIME_OID (za uptime)', 'en': 'SNMP_UPTIME_OID (for the uptime)'}, 'w': False, 'public':True, 'type': 'str', 'generated': True}, 
    'SNMP_CLIENT_OID': {'descriptions': {'si': 'SNMP_CLIENT_OID, ki naj ga klient bere', 'en':'The OID that the client should read'}, 'w': False, 'public':True, 'type': 'OID', 'generated': True}, 
    'SERVER_IP': {'descriptions': {'si': 'IP SNMP strežnika', 'en':'IP of the SNMP server'}, 'w': True, 'public':True, 'type': 'IP', 'generated': False}, 
    'CLIENT_IP': {'descriptions': {'si': 'IP SNMP klienta', 'en': 'IP of the SNMP client'}, 'w': True, 'public':True, 'type': 'IP', 'generated': False}, 

}

def task(SERVER_IP, CLIENT_IP, SNMP_UPTIME_OID, SNMP_CLIENT_OID):
    # TODO popravi IPje
    import netsnmp
    import paramiko
    from paramiko import SSHClient
    return_results = {}

    client = SSHClient()
    client.load_system_host_keys()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

    client.connect(SERVER_IP, username='student', password='vaje')
    stdin, stdout, stderr = client.exec_command('uptime=$(</proc/uptime); uptime=${uptime%%.*}; echo $uptime')
    return_results['server_uptime'] = stdout.read()

    try:
        session = netsnmp.Session(DestHost=SERVER_IP, Version=2, Community='studentje')
        # results_objs = netsnmp.VarList(netsnmp.Varbind(SNMP_UPTIME_OID)) #117.112.116.105.109.101  <-uptime
        results_objs = netsnmp.VarList(netsnmp.Varbind('.1.3.6.1.4.1.8072.1.3.2.4.1.2')) #117.112.116.105.109.101  <-uptime
        session.walk(results_objs)
        result_list = []
        for result in results_objs:
            result_list.append('{}.{}: {}'.format(
                result.tag, result.iid, result.val))
        return_results['server_OID'] = "\n".join(result_list)
    except Exception as exception_error:
            # Check for errors and print out results
        print(('ERROR: Occurred during SNMPget for OID %s from %s: '
                   '(%s)') % (SNMP_UPTIME_OID, CLIENT_IP, exception_error))
        sys.exit(2)
 
    client.connect(CLIENT_IP, username='test', password='test')
    stdin, stdout, stderr = client.exec_command('uptime=$(</proc/uptime); uptime=${uptime%%.*}; echo $(( uptime ))')
    return_results['client_uptime'] = stdout.read()
    # zakaj bi morala biti ravno bash skripta?
    stdin, stdout, stderr = client.exec_command('/home/test/upminutes')
    #TODO preverit da ni v skripti hardcodan
    return_results['client_script'] = stdout.read()

    stdin, stdout, stderr = client.exec_command('/home/test/beri.sh')
    return_results['client_script2'] = stdout.read()
    #TODO add 3 part of assigement
    return return_results

    
def gen_params(user_id, params_meta):
    import random
    params = dict()
    r = random.Random(user_id)
    # You can also create an OID creation function in kpov_util.
    # this should probably return params_meta

    params['SNMP_VALUE'] = kpov_util.alnum_gen(r, 64)
    params['SNMP_UPTIME_OID'] = 'NET-SNMP-EXTEND-MIB::nsExtendOutLine."{}".1'.format(
        kpov_util.hostname_gen(r))
    params['SNMP_CLIENT_OID'] = '1.3.6.1.4.1.8072.2.9999.9999.{}'.format(
	    r.randint(0, 255))

    return params

def task_check(results, params):
    #TODO improve regex
    import re
    score = 0
    hints = []
    client_script_uptime = int(results['client_script'].strip())
    client_uptime = int(results['client_uptime'].strip())
    d = client_uptime - client_script_uptime*60
    if d >= 0 and d < 62:
        score += 3
    else:
        hints += ["client uptime script output wrong."]
    server_uptime = int(results['server_uptime'].strip())
    lines = results['server_OID'].split('\n')
    unique_part_start = params['SNMP_UPTIME_OID'].find('"')
    unique_part_end = params['SNMP_UPTIME_OID'].find('"', unique_part_start+1)
    unique_part = params['SNMP_UPTIME_OID'][unique_part_start+1:unique_part_end]
    server_oid = 'iso.3.6.1.4.1.8072.1.3.2.4.1.2.{}.'.format(len(unique_part))
    server_oid += '.'.join([str(ord(i)) for i in unique_part]) + '.1.'
    found_uptime = False
    for line in lines:
        try:
            oid, uptime_s = line.split(':')
            d = server_uptime - int(uptime_s.strip())
            if oid.strip() == server_oid and d >= -2 and d <= 5:
                found_uptime = True
                break
        except Exception as e:
            pass
    if len(lines) <= 50 and found_uptime:
        score += 3
    else:
        hints += ["Uptime not found in server's MDB"]
    if results['client_script2'].find(params['SNMP_VALUE']) >= 0:
        score += 4
    else:
        hints += ["beri.sh not working properly"]
    return score, hints

def prepare_disks(templates, task_params, global_params):
#    d = templates['simpleArbiterDhcp']
    prog = """#!/usr/bin/python
import sys
action = sys.argv[1]
oid = sys.argv[2]

foo_oid = ".{oid}"
foo_oid_start = foo_oid[:foo_oid.rfind('.')]
foo_oid_end = foo_oid[len(foo_oid_start)+1:]
oid_end = oid[len(foo_oid_start)+1:]
oid_start = oid[:len(foo_oid_start)]

if action == '-n' and (
            (oid_start == foo_oid_start) and (
                (len(oid_end) == 0) or (int(oid_end) < int(foo_oid_end))
            )
        ):
    oid = foo_oid

if action != '-s' and oid == foo_oid:
    print foo_oid
    print "string"
    print "{val}"
""".format(oid = task_params['SNMP_CLIENT_OID'], val = task_params['SNMP_VALUE'])
    templates['simpleArbiterDhcpGWSNMP'].write('/usr/local/bin/snmpext.py', prog)
    templates['simpleArbiterDhcpGWSNMP'].chmod(0o755, '/usr/local/bin/snmpext.py')
    write_default_config(templates['simpleArbiterDhcpGWSNMP'], global_params)