|
| 1 | +#!/usr/bin/env python3 |
| 2 | +import datetime |
| 3 | +import logging |
| 4 | +import os |
| 5 | +import re |
| 6 | +import signal |
| 7 | +import subprocess |
| 8 | +import sys |
| 9 | + |
| 10 | +import vrnetlab |
| 11 | + |
| 12 | +# loadable startup config |
| 13 | +STARTUP_CONFIG_FILE = "/config/startup-config.cfg" |
| 14 | + |
| 15 | + |
| 16 | +def handle_SIGCHLD(signal, frame): |
| 17 | + os.waitpid(-1, os.WNOHANG) |
| 18 | + |
| 19 | + |
| 20 | +def handle_SIGTERM(signal, frame): |
| 21 | + sys.exit(0) |
| 22 | + |
| 23 | + |
| 24 | +signal.signal(signal.SIGINT, handle_SIGTERM) |
| 25 | +signal.signal(signal.SIGTERM, handle_SIGTERM) |
| 26 | +signal.signal(signal.SIGCHLD, handle_SIGCHLD) |
| 27 | + |
| 28 | +TRACE_LEVEL_NUM = 9 |
| 29 | +logging.addLevelName(TRACE_LEVEL_NUM, "TRACE") |
| 30 | + |
| 31 | + |
| 32 | +def trace(self, message, *args, **kws): |
| 33 | + # Yes, logger takes its '*args' as 'args'. |
| 34 | + if self.isEnabledFor(TRACE_LEVEL_NUM): |
| 35 | + self._log(TRACE_LEVEL_NUM, message, args, **kws) |
| 36 | + |
| 37 | + |
| 38 | +logging.Logger.trace = trace |
| 39 | + |
| 40 | + |
| 41 | +class VJUNOSROUTER_vm(vrnetlab.VM): |
| 42 | + def __init__(self, hostname, username, password, conn_mode): |
| 43 | + for e in os.listdir("/"): |
| 44 | + if re.search(".qcow2$", e): |
| 45 | + disk_image = "/" + e |
| 46 | + super(VJUNOSROUTER_vm, self).__init__( |
| 47 | + username, password, disk_image=disk_image, ram=5120 |
| 48 | + ) |
| 49 | + # device hostname |
| 50 | + self.hostname = hostname |
| 51 | + |
| 52 | + # read init.conf configuration file to replace hostname placehodler |
| 53 | + # with given hostname |
| 54 | + with open("init.conf", "r") as file: |
| 55 | + cfg = file.read() |
| 56 | + |
| 57 | + # replace HOSTNAME file var with nodes given hostname |
| 58 | + new_cfg = cfg.replace("{HOSTNAME}", hostname) |
| 59 | + |
| 60 | + # write changes to init.conf file |
| 61 | + with open("init.conf", "w") as file: |
| 62 | + file.write(new_cfg) |
| 63 | + |
| 64 | + # pass in user startup config |
| 65 | + self.startup_config() |
| 66 | + |
| 67 | + # these QEMU cmd line args are translated from the shipped libvirt XML file |
| 68 | + self.qemu_args.extend(["-smp", "4,sockets=1,cores=4,threads=1"]) |
| 69 | + # Additional CPU info |
| 70 | + self.qemu_args.extend( |
| 71 | + [ |
| 72 | + "-cpu", |
| 73 | + "IvyBridge,vme=on,ss=on,vmx=on,f16c=on,rdrand=on,hypervisor=on,arat=on,tsc-adjust=on,umip=on,arch-capabilities=on,pdpe1gb=on,skip-l1dfl-vmentry=on,pschange-mc-no=on,bmi1=off,avx2=off,bmi2=off,erms=off,invpcid=off,rdseed=off,adx=off,smap=off,xsaveopt=off,abm=off,svm=on", |
| 74 | + ] |
| 75 | + ) |
| 76 | + # mount config disk with juniper.conf base configs |
| 77 | + self.qemu_args.extend( |
| 78 | + [ |
| 79 | + "-drive", |
| 80 | + "if=none,id=config_disk,file=/config.img,format=raw", |
| 81 | + "-device", |
| 82 | + "virtio-blk-pci,drive=config_disk", |
| 83 | + ] |
| 84 | + ) |
| 85 | + self.qemu_args.extend(["-overcommit", "mem-lock=off"]) |
| 86 | + self.qemu_args.extend( |
| 87 | + ["-display", "none", "-no-user-config", "-nodefaults", "-boot", "strict=on"] |
| 88 | + ) |
| 89 | + self.nic_type = "virtio-net-pci" |
| 90 | + self.num_nics = 11 |
| 91 | + self.smbios = ["type=1,product=VM-VMX,family=lab"] |
| 92 | + self.qemu_args.extend(["-machine", "pc,usb=off,dump-guest-core=off,accel=kvm"]) |
| 93 | + self.qemu_args.extend( |
| 94 | + ["-device", "piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2"] |
| 95 | + ) |
| 96 | + self.conn_mode = conn_mode |
| 97 | + |
| 98 | + def startup_config(self): |
| 99 | + """Load additional config provided by user and append initial |
| 100 | + configurations set by vrnetlab.""" |
| 101 | + # if startup cfg DNE |
| 102 | + if not os.path.exists(STARTUP_CONFIG_FILE): |
| 103 | + self.logger.trace(f"Startup config file {STARTUP_CONFIG_FILE} is not found") |
| 104 | + # rename init.conf to juniper.conf, this is our startup config |
| 105 | + os.rename("init.conf", "juniper.conf") |
| 106 | + |
| 107 | + # if startup cfg file is found |
| 108 | + else: |
| 109 | + self.logger.trace( |
| 110 | + f"Startup config file {STARTUP_CONFIG_FILE} found, appending initial configuration" |
| 111 | + ) |
| 112 | + # append startup cfg to inital configuration |
| 113 | + append_cfg = f"cat init.conf {STARTUP_CONFIG_FILE} >> juniper.conf" |
| 114 | + subprocess.run(append_cfg, shell=True) |
| 115 | + |
| 116 | + # generate mountable config disk based on juniper.conf file with base vrnetlab configs |
| 117 | + subprocess.run(["./make-config.sh", "juniper.conf", "config.img"], check=True) |
| 118 | + |
| 119 | + def bootstrap_spin(self): |
| 120 | + """This function should be called periodically to do work.""" |
| 121 | + if self.spins > 300: |
| 122 | + # too many spins with no result -> give up |
| 123 | + self.stop() |
| 124 | + self.start() |
| 125 | + return |
| 126 | + |
| 127 | + # lets wait for the OS/platform log to determine if VM is booted, |
| 128 | + # login prompt can get lost in boot logs |
| 129 | + (ridx, match, res) = self.tn.expect([b"FreeBSD/amd64"], 1) |
| 130 | + if match: # got a match! |
| 131 | + if ridx == 0: # login |
| 132 | + self.logger.info("VM started") |
| 133 | + |
| 134 | + # Login |
| 135 | + self.wait_write("\r", None) |
| 136 | + self.wait_write("admin", wait="login:") |
| 137 | + self.wait_write(self.password, wait="Password:") |
| 138 | + self.wait_write("\r", None) |
| 139 | + self.logger.info("Login completed") |
| 140 | + |
| 141 | + # close telnet connection |
| 142 | + self.tn.close() |
| 143 | + # startup time? |
| 144 | + startup_time = datetime.datetime.now() - self.start_time |
| 145 | + self.logger.info("Startup complete in: %s" % startup_time) |
| 146 | + # mark as running |
| 147 | + self.running = True |
| 148 | + return |
| 149 | + |
| 150 | + # no match, if we saw some output from the router it's probably |
| 151 | + # booting, so let's give it some more time |
| 152 | + if res != b"": |
| 153 | + self.logger.trace("OUTPUT: %s" % res.decode()) |
| 154 | + # reset spins if we saw some output |
| 155 | + self.spins = 0 |
| 156 | + |
| 157 | + self.spins += 1 |
| 158 | + |
| 159 | + return |
| 160 | + |
| 161 | + |
| 162 | +class VJUNOSROUTER(vrnetlab.VR): |
| 163 | + def __init__(self, hostname, username, password, conn_mode): |
| 164 | + super(VJUNOSROUTER, self).__init__(username, password) |
| 165 | + self.vms = [VJUNOSROUTER_vm(hostname, username, password, conn_mode)] |
| 166 | + |
| 167 | + |
| 168 | +if __name__ == "__main__": |
| 169 | + import argparse |
| 170 | + |
| 171 | + parser = argparse.ArgumentParser(description="") |
| 172 | + parser.add_argument( |
| 173 | + "--trace", action="store_true", help="enable trace level logging" |
| 174 | + ) |
| 175 | + parser.add_argument( |
| 176 | + "--hostname", default="vr-VJUNOSROUTER", help="vJunos-router hostname" |
| 177 | + ) |
| 178 | + parser.add_argument("--username", default="vrnetlab", help="Username") |
| 179 | + parser.add_argument("--password", default="VR-netlab9", help="Password") |
| 180 | + parser.add_argument( |
| 181 | + "--connection-mode", default="tc", help="Connection mode to use in the datapath" |
| 182 | + ) |
| 183 | + args = parser.parse_args() |
| 184 | + |
| 185 | + LOG_FORMAT = "%(asctime)s: %(module)-10s %(levelname)-8s %(message)s" |
| 186 | + logging.basicConfig(format=LOG_FORMAT) |
| 187 | + logger = logging.getLogger() |
| 188 | + |
| 189 | + logger.setLevel(logging.DEBUG) |
| 190 | + if args.trace: |
| 191 | + logger.setLevel(1) |
| 192 | + |
| 193 | + vr = VJUNOSROUTER( |
| 194 | + args.hostname, |
| 195 | + args.username, |
| 196 | + args.password, |
| 197 | + conn_mode=args.connection_mode, |
| 198 | + ) |
| 199 | + vr.start() |
0 commit comments