Schlagwort: Ansible

Veröffentlicht am

Python Scapy: Wait for CDP-Neighbor

After provisioning a new Cisco CSR1000V-Router this script

  • waits until the router is fully deployed
  • got it’s Management-IP-Address assigned via DHCP.

and returns this Management IP-Address.

  1. Prepare

    2. First, install „netaddr“-package.

    • needed to check, if the management-IP of the CDP-Neighbor is in the correct IP-Subnet
    C:\RH>pip install netaddr
Collecting netaddr
  Downloading https://files.pythonhosted.org/packages/ba/97/ce14451a9fd7bdb5a397abf99b24a1a6bb7a1a440b019bebd2e9a0dbec74/netaddr-0.7.19-py2.py3-none-any.whl (1.6MB)
    100% |████████████████████████████████| 1.6MB 4.0MB/s
Installing collected packages: netaddr
Successfully installed netaddr-0.7.19
  2. the „wait-for-CDP“-Script

    3. Obviously far to much hard-coded stuff, just as an example 😉 waiting for a CDP-Neighbor to appear with the following properties:

    • hostname „CSR-A“
    • an IP-Address within the network „192.168.56.0 /24“

      • at the interface

    • VirtualBox Host-Only-Network
    #! /usr/bin/env python

from scapy.all import *
load_contrib("cdp")

from netaddr import IPNetwork, IPAddress

# run it for max. 99 Packets
ip = "0.0.0.0"
wait_for_hostname = "CSR-A"
wait_for_host_in_network = "192.168.56.0/24"

interface="VirtualBox Host-Only Ethernet Adapter"
capturefilter="ether dst 01:00:0c:cc:cc:cc"

while not(IPAddress(ip) in IPNetwork(wait_for_host_in_network)):
  p=sniff(iface=interface, count=1, filter=capturefilter)
  pkt=p[0]
  #print("Packet received",pkt.show())

  #is this a CDP-Packet containing a hostname?
  if (CDPMsgDeviceID in pkt):
    #is this the CDP-Neighbor we're looking for?
    device=pkt["CDPMsgDeviceID"].val.decode()
    hostname=device.split(".")[0]
    #print("Hostname:",hostname)

    if (hostname == wait_for_hostname):
      #is this a CDP-Packet containing a management-IP-Address?
      if (CDPAddrRecordIPv4 in pkt):
        ip=pkt["CDPAddrRecordIPv4"].addr
        #print("IP-Address found:",ip)

#return the IP-Address to the calling application or the CLI
print(ip)
  3. Provision a new CSR1000V Router named „CSR-A“
    4. C:\RH>CSR1000v-Virtual-Box.cmd
Enter CSR1000v Hostname:CSR-A
Virtual machine 'CSR-A' is created and registered.
UUID: 8a9c969e-3895-4a7c-9cbc-5f5551bf1b7b
Settings file: 'c:\RH\LAB\VM\CSR-A\CSR-A.vbox'
Creating ISO image at c:\RH\LAB\VM\CSR-A\config.iso, 1 Files, Size: 8,00 KB
100%
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Medium created. UUID: 55ea8df5-7e3c-4485-8e08-9302cb61a09d
Waiting for VM "CSR-A" to power on...
VM "CSR-A" has been successfully started.
  4. Run the „wait-for-CDP-Neighbor“-Script

    5. In a second CMD-Box, and… Be patient, of course.

    C:\RH>python wait-for-cdpneighbor.py
192.168.56.101
  5. Or store the returned IP-Address in an Shell-Variable „ROUTER-IP“/li>
    C:\RH>for /f %I in ('python wait-for-cdpneighbor.py 2^> nul') do @(set ROUTER-IP=%I)
  6. and pass it to putty – using public-key authentication

    7. The Public-Key for user „labuser“ is part of my baseline-config used to provision the virtual-router.

    C:\RH>putty -ssh -i C:\RH\work\putty-rsa-key\labuser.ppk labuser@%ROUTER-IP%

    Works, this is a nice preparation for an automated virtual ansible-lab, too!

Veröffentlicht am

Ubuntu – Install Ansible

It should be easy, and it is – but no single-command installation:

administrator@lx-ubuntu:$ sudo apt-get install ansible
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ansible

Look at the Ubuntu Packet-Search for Ansible:

  • it’s in the „universe“-repository

Add the „universe“-repository:

administrator@lx-ubuntu:$ sudo add-apt-repository universe
'universe' distribution component enabled for all sources.
Hit:1 http://archive.ubuntu.com/ubuntu bionic InRelease
Get:2 http://archive.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Get:3 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:4 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages [8,570 kB]
Get:5 http://archive.ubuntu.com/ubuntu bionic/universe Translation-en [4,941 kB]
Get:6 http://archive.ubuntu.com/ubuntu bionic-security/universe amd64 Packages [84.5 kB]
Get:7 http://archive.ubuntu.com/ubuntu bionic-security/universe Translation-en [46.4 kB]
Get:8 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [556 kB]
Get:9 http://archive.ubuntu.com/ubuntu bionic-updates/universe Translation-en [143 kB]
Fetched 14.5 MB in 18s (824 kB/s)
Reading package lists... Done

Now it works:

administrator@lx-ubuntu:$ sudo apt-get install ansible
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  ieee-data libpython-stdlib libpython2.7-minimal libpython2.7-stdlib python python-asn1crypto python-certifi
  python-cffi-backend python-chardet python-crypto python-cryptography python-enum34 python-httplib2 python-idna
  python-ipaddress python-jinja2 python-jmespath python-kerberos python-libcloud python-lockfile python-markupsafe
  python-minimal python-netaddr python-openssl python-paramiko python-pkg-resources python-pyasn1 python-requests
  python-selinux python-simplejson python-six python-urllib3 python-xmltodict python-yaml python2.7 python2.7-minimal
Suggested packages:
  cowsay sshpass python-doc python-tk python-crypto-doc python-cryptography-doc python-cryptography-vectors
  python-enum34-doc python-jinja2-doc python-lockfile-doc ipython python-netaddr-docs python-openssl-doc
  python-openssl-dbg python-gssapi python-setuptools python-socks python-ntlm python2.7-doc binutils binfmt-support
Recommended packages:
  python-winrm
The following NEW packages will be installed:
  ansible ieee-data libpython-stdlib libpython2.7-minimal libpython2.7-stdlib python python-asn1crypto python-certifi
  python-cffi-backend python-chardet python-crypto python-cryptography python-enum34 python-httplib2 python-idna
  python-ipaddress python-jinja2 python-jmespath python-kerberos python-libcloud python-lockfile python-markupsafe
  python-minimal python-netaddr python-openssl python-paramiko python-pkg-resources python-pyasn1 python-requests
  python-selinux python-simplejson python-six python-urllib3 python-xmltodict python-yaml python2.7 python2.7-minimal
0 upgraded, 37 newly installed, 0 to remove and 3 not upgraded.
Need to get 12.1 MB of archives.
After this operation, 79.4 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu bionic/main amd64 libpython2.7-minimal amd64 2.7.15~rc1-1 [334 kB]
Get:2 http://archive.ubuntu.com/ubuntu bionic/main amd64 python2.7-minimal amd64 2.7.15~rc1-1 [1,292 kB]
Get:3 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-minimal amd64 2.7.15~rc1-1 [28.1 kB]
Get:4 http://archive.ubuntu.com/ubuntu bionic/main amd64 libpython2.7-stdlib amd64 2.7.15~rc1-1 [1,910 kB]
Get:5 http://archive.ubuntu.com/ubuntu bionic/main amd64 python2.7 amd64 2.7.15~rc1-1 [238 kB]
Get:6 http://archive.ubuntu.com/ubuntu bionic/main amd64 libpython-stdlib amd64 2.7.15~rc1-1 [7,620 B]
Get:7 http://archive.ubuntu.com/ubuntu bionic/main amd64 python amd64 2.7.15~rc1-1 [140 kB]
Get:8 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-asn1crypto all 0.24.0-1 [72.7 kB]
Get:9 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-cffi-backend amd64 1.11.5-1 [63.4 kB]
Get:10 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-enum34 all 1.1.6-2 [34.8 kB]
Get:11 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-idna all 2.6-1 [32.4 kB]
Get:12 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-ipaddress all 1.0.17-1 [18.2 kB]
Get:13 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-six all 1.11.0-2 [11.3 kB]
Get:14 http://archive.ubuntu.com/ubuntu bionic-security/main amd64 python-cryptography amd64 2.1.4-1ubuntu1.2 [221 kB]
Get:15 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-markupsafe amd64 1.0-1build1 [13.0 kB]
Get:16 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-jinja2 all 2.10-1 [94.6 kB]
Get:17 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-pyasn1 all 0.4.2-3 [46.7 kB]
Get:18 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-paramiko all 2.0.0-1ubuntu1 [110 kB]
Get:19 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-pkg-resources all 39.0.1-2 [128 kB]
Get:20 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-yaml amd64 3.12-1build2 [115 kB]
Get:21 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-crypto amd64 2.6.1-8ubuntu2 [244 kB]
Get:22 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-httplib2 all 0.9.2+dfsg-1 [34.6 kB]
Get:23 http://archive.ubuntu.com/ubuntu bionic/main amd64 ieee-data all 20180204.1 [1,539 kB]
Get:24 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-netaddr all 0.7.19-1 [213 kB]
Get:25 http://archive.ubuntu.com/ubuntu bionic/universe amd64 ansible all 2.5.1+dfsg-1 [3,197 kB]
Get:26 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-certifi all 2018.1.18-2 [144 kB]
Get:27 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-chardet all 3.0.4-1 [80.3 kB]
Get:28 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-jmespath all 0.9.3-1ubuntu1 [21.2 kB]
Get:29 http://archive.ubuntu.com/ubuntu bionic/universe amd64 python-kerberos amd64 1.1.14-1 [22.5 kB]
Get:30 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-urllib3 all 1.22-1 [85.1 kB]
Get:31 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-requests all 2.18.4-2 [58.3 kB]
Get:32 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-lockfile all 1:0.12.2-2 [14.6 kB]
Get:33 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-simplejson amd64 3.13.2-1 [61.2 kB]
Get:34 http://archive.ubuntu.com/ubuntu bionic/universe amd64 python-libcloud all 2.2.1-1 [1,235 kB]
Get:35 http://archive.ubuntu.com/ubuntu bionic/main amd64 python-openssl all 17.5.0-1ubuntu1 [41.3 kB]
Get:36 http://archive.ubuntu.com/ubuntu bionic/universe amd64 python-selinux amd64 2.7-2build2 [138 kB]
Get:37 http://archive.ubuntu.com/ubuntu bionic/universe amd64 python-xmltodict all 0.11.0-1 [10.3 kB]
Fetched 12.1 MB in 18s (672 kB/s)
Extracting templates from packages: 100%
Selecting previously unselected package libpython2.7-minimal:amd64.
(Reading database ... 102195 files and directories currently installed.)
Preparing to unpack .../0-libpython2.7-minimal_2.7.15~rc1-1_amd64.deb ...
Unpacking libpython2.7-minimal:amd64 (2.7.15~rc1-1) ...
Selecting previously unselected package python2.7-minimal.
Preparing to unpack .../1-python2.7-minimal_2.7.15~rc1-1_amd64.deb ...
Unpacking python2.7-minimal (2.7.15~rc1-1) ...
Selecting previously unselected package python-minimal.
Preparing to unpack .../2-python-minimal_2.7.15~rc1-1_amd64.deb ...
Unpacking python-minimal (2.7.15~rc1-1) ...
Selecting previously unselected package libpython2.7-stdlib:amd64.
Preparing to unpack .../3-libpython2.7-stdlib_2.7.15~rc1-1_amd64.deb ...
Unpacking libpython2.7-stdlib:amd64 (2.7.15~rc1-1) ...
Selecting previously unselected package python2.7.
Preparing to unpack .../4-python2.7_2.7.15~rc1-1_amd64.deb ...
Unpacking python2.7 (2.7.15~rc1-1) ...
Selecting previously unselected package libpython-stdlib:amd64.
Preparing to unpack .../5-libpython-stdlib_2.7.15~rc1-1_amd64.deb ...
Unpacking libpython-stdlib:amd64 (2.7.15~rc1-1) ...
Setting up libpython2.7-minimal:amd64 (2.7.15~rc1-1) ...
Setting up python2.7-minimal (2.7.15~rc1-1) ...
Linking and byte-compiling packages for runtime python2.7...
Setting up python-minimal (2.7.15~rc1-1) ...
Selecting previously unselected package python.
(Reading database ... 102942 files and directories currently installed.)
Preparing to unpack .../00-python_2.7.15~rc1-1_amd64.deb ...
Unpacking python (2.7.15~rc1-1) ...
Selecting previously unselected package python-asn1crypto.
Preparing to unpack .../01-python-asn1crypto_0.24.0-1_all.deb ...
Unpacking python-asn1crypto (0.24.0-1) ...
Selecting previously unselected package python-cffi-backend.
Preparing to unpack .../02-python-cffi-backend_1.11.5-1_amd64.deb ...
Unpacking python-cffi-backend (1.11.5-1) ...
Selecting previously unselected package python-enum34.
Preparing to unpack .../03-python-enum34_1.1.6-2_all.deb ...
Unpacking python-enum34 (1.1.6-2) ...
Selecting previously unselected package python-idna.
Preparing to unpack .../04-python-idna_2.6-1_all.deb ...
Unpacking python-idna (2.6-1) ...
Selecting previously unselected package python-ipaddress.
Preparing to unpack .../05-python-ipaddress_1.0.17-1_all.deb ...
Unpacking python-ipaddress (1.0.17-1) ...
Selecting previously unselected package python-six.
Preparing to unpack .../06-python-six_1.11.0-2_all.deb ...
Unpacking python-six (1.11.0-2) ...
Selecting previously unselected package python-cryptography.
Preparing to unpack .../07-python-cryptography_2.1.4-1ubuntu1.2_amd64.deb ...
Unpacking python-cryptography (2.1.4-1ubuntu1.2) ...
Selecting previously unselected package python-markupsafe.
Preparing to unpack .../08-python-markupsafe_1.0-1build1_amd64.deb ...
Unpacking python-markupsafe (1.0-1build1) ...
Selecting previously unselected package python-jinja2.
Preparing to unpack .../09-python-jinja2_2.10-1_all.deb ...
Unpacking python-jinja2 (2.10-1) ...
Selecting previously unselected package python-pyasn1.
Preparing to unpack .../10-python-pyasn1_0.4.2-3_all.deb ...
Unpacking python-pyasn1 (0.4.2-3) ...
Selecting previously unselected package python-paramiko.
Preparing to unpack .../11-python-paramiko_2.0.0-1ubuntu1_all.deb ...
Unpacking python-paramiko (2.0.0-1ubuntu1) ...
Selecting previously unselected package python-pkg-resources.
Preparing to unpack .../12-python-pkg-resources_39.0.1-2_all.deb ...
Unpacking python-pkg-resources (39.0.1-2) ...
Selecting previously unselected package python-yaml.
Preparing to unpack .../13-python-yaml_3.12-1build2_amd64.deb ...
Unpacking python-yaml (3.12-1build2) ...
Selecting previously unselected package python-crypto.
Preparing to unpack .../14-python-crypto_2.6.1-8ubuntu2_amd64.deb ...
Unpacking python-crypto (2.6.1-8ubuntu2) ...
Selecting previously unselected package python-httplib2.
Preparing to unpack .../15-python-httplib2_0.9.2+dfsg-1_all.deb ...
Unpacking python-httplib2 (0.9.2+dfsg-1) ...
Selecting previously unselected package ieee-data.
Preparing to unpack .../16-ieee-data_20180204.1_all.deb ...
Unpacking ieee-data (20180204.1) ...
Selecting previously unselected package python-netaddr.
Preparing to unpack .../17-python-netaddr_0.7.19-1_all.deb ...
Unpacking python-netaddr (0.7.19-1) ...
Selecting previously unselected package ansible.
Preparing to unpack .../18-ansible_2.5.1+dfsg-1_all.deb ...
Unpacking ansible (2.5.1+dfsg-1) ...
Selecting previously unselected package python-certifi.
Preparing to unpack .../19-python-certifi_2018.1.18-2_all.deb ...
Unpacking python-certifi (2018.1.18-2) ...
Selecting previously unselected package python-chardet.
Preparing to unpack .../20-python-chardet_3.0.4-1_all.deb ...
Unpacking python-chardet (3.0.4-1) ...
Selecting previously unselected package python-jmespath.
Preparing to unpack .../21-python-jmespath_0.9.3-1ubuntu1_all.deb ...
Unpacking python-jmespath (0.9.3-1ubuntu1) ...
Selecting previously unselected package python-kerberos.
Preparing to unpack .../22-python-kerberos_1.1.14-1_amd64.deb ...
Unpacking python-kerberos (1.1.14-1) ...
Selecting previously unselected package python-urllib3.
Preparing to unpack .../23-python-urllib3_1.22-1_all.deb ...
Unpacking python-urllib3 (1.22-1) ...
Selecting previously unselected package python-requests.
Preparing to unpack .../24-python-requests_2.18.4-2_all.deb ...
Unpacking python-requests (2.18.4-2) ...
Selecting previously unselected package python-lockfile.
Preparing to unpack .../25-python-lockfile_1%3a0.12.2-2_all.deb ...
Unpacking python-lockfile (1:0.12.2-2) ...
Selecting previously unselected package python-simplejson.
Preparing to unpack .../26-python-simplejson_3.13.2-1_amd64.deb ...
Unpacking python-simplejson (3.13.2-1) ...
Selecting previously unselected package python-libcloud.
Preparing to unpack .../27-python-libcloud_2.2.1-1_all.deb ...
Unpacking python-libcloud (2.2.1-1) ...
Selecting previously unselected package python-openssl.
Preparing to unpack .../28-python-openssl_17.5.0-1ubuntu1_all.deb ...
Unpacking python-openssl (17.5.0-1ubuntu1) ...
Selecting previously unselected package python-selinux.
Preparing to unpack .../29-python-selinux_2.7-2build2_amd64.deb ...
Unpacking python-selinux (2.7-2build2) ...
Selecting previously unselected package python-xmltodict.
Preparing to unpack .../30-python-xmltodict_0.11.0-1_all.deb ...
Unpacking python-xmltodict (0.11.0-1) ...
Setting up ieee-data (20180204.1) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for man-db (2.8.3-2) ...
Setting up libpython2.7-stdlib:amd64 (2.7.15~rc1-1) ...
Setting up python2.7 (2.7.15~rc1-1) ...
Setting up libpython-stdlib:amd64 (2.7.15~rc1-1) ...
Setting up python (2.7.15~rc1-1) ...
Setting up python-idna (2.6-1) ...
Setting up python-simplejson (3.13.2-1) ...
Setting up python-yaml (3.12-1build2) ...
Setting up python-asn1crypto (0.24.0-1) ...
Setting up python-crypto (2.6.1-8ubuntu2) ...
Setting up python-pyasn1 (0.4.2-3) ...
Setting up python-netaddr (0.7.19-1) ...
Setting up python-xmltodict (0.11.0-1) ...
Setting up python-jmespath (0.9.3-1ubuntu1) ...
Setting up python-certifi (2018.1.18-2) ...
Setting up python-kerberos (1.1.14-1) ...
Setting up python-pkg-resources (39.0.1-2) ...
Setting up python-markupsafe (1.0-1build1) ...
Setting up python-httplib2 (0.9.2+dfsg-1) ...
Setting up python-cffi-backend (1.11.5-1) ...
Setting up python-six (1.11.0-2) ...
Setting up python-selinux (2.7-2build2) ...
Setting up python-enum34 (1.1.6-2) ...
Setting up python-lockfile (1:0.12.2-2) ...
Setting up python-ipaddress (1.0.17-1) ...
Setting up python-urllib3 (1.22-1) ...
Setting up python-chardet (3.0.4-1) ...
Setting up python-jinja2 (2.10-1) ...
Setting up python-cryptography (2.1.4-1ubuntu1.2) ...
Setting up python-requests (2.18.4-2) ...
Setting up python-openssl (17.5.0-1ubuntu1) ...
Setting up python-paramiko (2.0.0-1ubuntu1) ...
Setting up ansible (2.5.1+dfsg-1) ...
Setting up python-libcloud (2.2.1-1) ...

Which version?

  • as „packages.ubuntu.com“ said: 2.5.1
administrator@lx-ubuntu:$ ansible --version
ansible 2.5.1
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/home/administrator/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.15rc1 (default, Apr 15 2018, 21:51:34) [GCC 7.3.0]