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Diffstat (limited to 'tasks/snmp_agent_uptime/task.py')
-rw-r--r-- | tasks/snmp_agent_uptime/task.py | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/tasks/snmp_agent_uptime/task.py b/tasks/snmp_agent_uptime/task.py new file mode 100644 index 0000000..919fcb4 --- /dev/null +++ b/tasks/snmp_agent_uptime/task.py @@ -0,0 +1,224 @@ +# 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): + #<== Aleksander Fujs 6310020 ==> + # 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 + #<== Aleksander Fujs 6310020 ==> + + +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 + + #<== Aleksander Fujs 6310020 ==> + 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)) + #<== Aleksander Fujs 6310020 ==> + + 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) |