diff options
Diffstat (limited to 'kpov_judge/tasks/isc_dhcp_live_boot/task.py')
| -rw-r--r-- | kpov_judge/tasks/isc_dhcp_live_boot/task.py | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/kpov_judge/tasks/isc_dhcp_live_boot/task.py b/kpov_judge/tasks/isc_dhcp_live_boot/task.py deleted file mode 100644 index c1adc47..0000000 --- a/kpov_judge/tasks/isc_dhcp_live_boot/task.py +++ /dev/null @@ -1,222 +0,0 @@ -# TODO: dokoncaj! -# kpov_util should be imported by add_assignment.py - -instructions = { - 'si': '''\ -<p> -Postavi štiri navidezne računalnike: <em>simpleArbiter</em>, <em>DHCP_server</em>, <em>BootableClientA</em> in <em>BootableClientB</em>. - -<p> -Na <em>DHCP_server</em> postavi strežnik DHCP s pomočjo ISC dhcp 3 na naslovu <code>{{IP_DHCP}}</code>. <em>SimpleArbiter</em> naj dobi <code>{{IP_GW}}</code>. <em>DHCP_server</em> naj ga uporabi kot privzeti prehod (angl. <em lang="en">gateway</em>). - -<p> -Če se zaganja <em>BootableClientB</em>, naj se sistem zažene v datoteko z imenom <code>{{BOOT_FNAME}}</code>. Če se zaganja katerikoli drug, naj se sistem zažene z živega USB, ki ga predstavlja slika diska <code>bootable_usb</code>, ime datoteke z zagonskim nalagalnikom pa naj bo kakršno koli razen <code>{{BOOT_FNAME}}</code>. - -<p> -Živi USB priklopite na na <em>DHCP_server</em> in z njega poberite datoteke, potrebne za zagon. Datoteke z nastavitvami za PXELinux, ki jih najdete na živem USB, <em>morajo</em> biti dostopne na korenskem imeniku strežnika TFTP. - -<p> -Tako <em>BootableClientA</em> kot <em>BootableClientB</em> naj bosta brez diskov. -''', - 'en': '''\ -<p> -Set up four virtual machines: <em>simpleArbiter</em>, <em>DHCP_server</em>, <em>BootableClientA</em> and <em>BootableClientB</em>. - -<p> -On <em>DHCP_server</em>, set up a DHCP server using ISC dhcp 3. Set the IP address of this server to <code>{{IP_DHCP}}</code>. If <em>SimpleArbiter</em> requests an IP, have the DHCP server serve it <code>{{IP_GW}}</code>. <em>DHCP_server</em> should use <em>SimpleArbiter</em> as the gateway. - -<p> -If <em>BootableClientB</em> tries to boot over the network, have the DHCP server tell it to boot from the file <code>{{BOOT_FNAME}}</code>. If any other system tries to boot over the network, have it boot from a live USB drive represented by the disk image <code>bootable_usb</code> and have the bootloader filename be different from <code>{{BOOT_FNAME}}</code>. - -<p> -Connect the live USB to DHCP_server and copy the files neccessarry for it to boot. The PXELinux configuration files must be the same as the ones found on the live USB and <em>must</em> be accessible on the TFTP server root. - -<p> -Both <em>BootableCLientA</em> and <em>BootableClientB</em> should be diskless. -''', -} - -computers = { - 'DHCPServer': { - 'disks': [ - { 'name': 'student-DHCPServer', - }, - { 'name': 'bootable_usb', - 'options':{'readonly': False}, - 'parts': [ {'dev': 'sdb1', 'path':'/mnt'} ], - }, - ], - 'network_interfaces': [{'network': 'net1'}], - 'flavor': 'm1.tiny', - 'config_drive': False - }, - 'BootableClientA': { - 'disks': [ - ], - 'network_interfaces': [{'network': 'net1'}], - 'flavor': 'm1.tiny', - 'config_drive': False - }, - 'BootableClientB': { - 'disks': [ - ], - 'network_interfaces': [{'network': 'net1'}], - 'flavor': 'm1.tiny', - 'config_drive': False - }, - 'SimpleArbiter': { - 'disks': [ - { 'name': 'simpleArbiterGW', - }, - ], - 'network_interfaces': [{'network': 'net1'}, {'network': 'test-net'}], - 'flavor': 'm1.tiny', - 'config_drive': False - } -} - -networks = { 'net1': {'public': False}, 'test-net': {'public': True} } - -params_meta = { - 'IP_DHCP': {'descriptions': {'si': 'IP DHCP streznika'}, 'w': False, 'public': True, 'type':'IP', 'generated': True}, - 'IP_GW': {'descriptions': {'si': 'IP SimpleArbiterja'}, 'w': False, 'public': True, 'type':'IP', 'generated': True}, - 'MAC_BOOT': {'descriptions': {'si': 'MAC racunalnika, ki se zazene z ISO'}, 'w': True, 'public': True, 'type':'MAC', 'generated': False}, - # 'IP_BOOT': {'descriptions': {'si': 'IP racunalnika, ki se zazene z ISO'}, 'w': True, 'public': True, 'type':'IP', 'generated': False}, - 'TFTP_STRING': {'descriptions': {'si': 'vsebina'}, 'w': False, 'public': False, 'type':'short', 'generated': True}, - 'BOOT_FNAME': {'descriptions': {'si': 'Ime datoteke'}, 'w': False, 'public': True, 'type': 'filename', 'generated': True}, -} - -def task(IP_DHCP, IP_GW, MAC_BOOT, BOOT_FNAME): - # check the IP - # TODO (polz): Do not use tabs instead of spaces! - import pexpect - import re - import tftpy - import io - import time - results={} - # TODO (polz): Please use pexpect instead of os.system, it's much nicer. - # Also, test your functions. This function was obviously never run. - # - # check whether the fname served by the dhcp server is - # correct - # you should check the DHCP response from the server. - # You can use dhcpdump to get some packets, dhcping to create a - # DHCP Request. You may also use any other tool. - # If you choose to use dhcping, do not forget to set the hw address - # and ip arguments. You can simply feed it MAC_BOOT and IP_BOOT. - # dhcping -h MAC_BOOT -c IP_BOOT -V -r - # could work (but you should test it) - ip_str = pexpect.run('ip addr show') - eth_re_str = r"ether (([0-9a-f]{{2}}:){{5}}[0-9a-f]{{2}})(.*)\r\n(.*){}(.*)\s(\w*)\r\n" - ip_re = re.search(eth_re_str.format(IP_GW), ip_str) - mac_SA = ip_re.group(1) - eth_dev_SA = ip_re.group(6) - dhcpdump = pexpect.spawn("sudo dhcpdump -i {}".format(eth_dev_SA)) - time.sleep(2) - results['dhcping_other'] = pexpect.run('sudo dhcping -s {} -h {} -c {}'.format( - IP_DHCP, MAC_BOOT, IP_GW)) - dhcpdump.expect('---------------------------------------------------------------------------') - results['dhcpdump_other_req'] = dhcpdump.before - dhcpdump.expect('---------------------------------------------------------------------------') - results['dhcpdump_other_reply'] = dhcpdump.before - dhcpdump.expect('---------------------------------------------------------------------------') - results['dhcpdump_other_release'] = dhcpdump.before - results['dhcping_SA'] = pexpect.run('sudo dhcping -s {} -h {} -c {}'.format( - IP_DHCP, mac_SA, IP_GW)) - dhcpdump.expect('---------------------------------------------------------------------------') - results['dhcpdump_SA_req'] = dhcpdump.before - dhcpdump.expect('---------------------------------------------------------------------------') - results['dhcpdump_SA_reply'] = dhcpdump.before - dhcpdump.expect('---------------------------------------------------------------------------') - results['dhcpdump_SA_release'] = dhcpdump.before - dhcpdump.sendintr() - tftp_client = pexpect.spawn('tftp {}'.format(IP_DHCP)) - tftp_client.expect(r'tftp>') - tftp_client.sendline('get pxelinux.cfg/default /dev/stdout') - tftp_client.expect(r'tftp>') - results['tftp_string'] = tftp_client.before - # check whether the fname served by the dhcp server is correct - # connect to the service in the special ISO - # check the MAC of the server on IP_BOOT - return results - -def gen_params(user_id, params_meta): - params = dict() - r = random.Random(user_id) - net = kpov_util.IPv4_subnet_gen(r, '10.64.0.0/10', 24) - params['IP_DHCP'], params['IP_GW'] = kpov_util.IPv4_addr_gen(r, net, 2) - params['BOOT_FNAME'] = kpov_util.fname_gen(r) - params['TFTP_STRING'] = kpov_util.alnum_gen(r, 45) - return params - -def task_check(results, params): - import re - score = 0 - hints = [] - #TO FINISH SCORING WE REQUIRE DICT KEYS AND FUNCTIONS gen_params AND task TO BE FINISHED - #POINTS FOR EACH TASK MAY BE ADJUSTED IN THE FUTURE - if results['dhcping_other'].find(params['IP_DHCP']) >= 0: - score += 1 - else: - hints += ["DHCP wrong"] - if results['dhcping_SA'].find(params['IP_DHCP']) >= 0: - score += 1 - else: - hints += ["DHCP wrong"] - p = re.search(r"FNAME:(.*)\.\r", - results['dhcpdump_other_reply']) - if p is not None: - other_fname = p.group(1).strip() - else: - other_fname = '' - if other_fname == params['BOOT_FNAME']: - score += 3 - else: - hints += ["special fname wrong:" + other_fname] - p = re.search(r"FNAME:(.*)\.\r", - results['dhcpdump_SA_reply']) - if p is not None: - sa_fname = p.group(1).strip() - else: - sa_fname = '' - if sa_fname != params['BOOT_FNAME']: - score += 3 - else: - hints += ["fname wrong:" + sa_fname] - try: - special_tftp = "# " + params['TFTP_STRING'] - tftp_end = results['tftp_string'].split('\r\r\n')[-1] - assert tftp_end[:len(special_tftp)] == special_tftp - score += 2 - except: - hints += ["tftp wrong"] - return score, hints - -def prepare_disks(templates, task_params, global_params): - d = templates['student-DHCPServer'] - s = """# {}""".format(task_params['TFTP_STRING']) - d = templates['bootable_usb'] - d.write_append('/mnt/syslinux.cfg', s) - d = templates['simpleArbiterGW'] - s = """auto lo -iface lo inet loopback - -auto ens3 -iface ens3 inet dhcp - -auto enp0s3 -iface enp0s3 inet dhcp - -auto ens4 -iface ens4 inet static - address {IP_GW} - netmask 255.192.0.0 - -auto enp0s8 -iface enp0s8 inet static - address {IP_GW} - netmask 255.192.0.0 -""".format(IP_GW = task_params['IP_GW']) - d.write("/etc/network/interfaces", s) - write_default_config(templates['simpleArbiterGW'], global_params) |