OpenStack Operations Guide

By Tom Fifield, Diane Fleming, Anne Gentle, Lorin Hochstein, Jonathan Proulx

Design, installation, and preserve your individual deepest or public Infrastructure as a carrier (IaaS), utilizing the open resource OpenStack platform. during this sensible consultant, skilled builders and OpenStack individuals allow you to construct clouds in response to reference architectures, in addition to tips to practice day-by-day management tasks.

Designed for horizontal scalability, OpenStack enables you to construct a cloud via integrating numerous applied sciences. This technique presents flexibility, yet realizing which recommendations to exploit should be bewildering. when you whole this publication, you’ll comprehend the proper inquiries to ask whenever you set up compute, garage, and networking assets. for those who already know the way to regulate a number of Ubuntu machines and keep MySQL, you’re prepared to:

  • Set up computerized deployment and configuration
  • Design a single-node cloud controller
  • Use metrics to enhance scalability
  • Explore compute nodes, community layout, and storage
  • Install OpenStack packages
  • Use an instance structure to assist simplify decision-making
  • Build a operating atmosphere to discover an IaaS cloud
  • Manage clients, tasks, and quotas
  • Tackle upkeep, debugging, and community troubleshooting
  • Monitor, log, backup, and restore

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A hundred. 2,static,120s --dhcp-lease-max=256 --dhcp-hostsfile=/var/lib/nova/networks/nova-br100. conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro root 2439 zero. zero zero. zero 27512 472 ? S Feb26 0:00 /usr/sbin/dnsmasq --strict-order --bind-interfaces --conf-file= --domain=novalocal --pid-file=/var/lib/nova/networks/nova-br100. pid --listen-address=192. 168. a hundred. 1 --except-interface=lo --dhcp-range=set:'novanetwork',192. 168. a hundred. 2,static,120s --dhcp-lease-max=256 --dhcp-hostsfile=/var/lib/nova/networks/nova-br100. conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro The output indicates 3 diverse dnsmasq approaches. The dnsmasq approach that has the DHCP subnet variety of 192. 168. 122. zero belongs to libvirt and will be overlooked. the opposite dnsmasq tactics belong to nova-network. the 2 procedures are literally related—one is just the mother or father strategy of the opposite. The arguments of the dnsmasq approaches may still correspond to the main points you configured nova-network with. If the matter doesn't appear to be relating to dnsmasq itself, at this element use tcpdump at the interfaces to figure out the place the packets have become misplaced. DHCP site visitors makes use of UDP. the customer sends from port sixty eight to port sixty seven at the server. attempt to boot a brand new example after which systematically hear at the NICs till you determine the one who isn’t seeing the site visitors. to exploit tcpdump to hear ports sixty seven and sixty eight on br100, you are going to do: # tcpdump -i br100 -n port sixty seven or port sixty eight try to be doing sanity tests at the interfaces utilizing command reminiscent of ip a and brctl convey to make sure that the interfaces are literally up and configured the best way that you simply imagine that they're. Debugging DHCP matters with nova-network | 151 Debugging DNS matters while you are capable of use SSH to log into an example, however it takes a long time (on the order of a minute) to get a instructed, you then may have a DNS factor. the explanation a DNS factor could cause this challenge is that the SSH server does a opposite DNS search for at the IP deal with that you're connecting from. If DNS search for isn’t engaged on your cases, then you definately needs to look ahead to the DNS opposite search for timeout to take place for the SSH login technique to accomplish. whilst debugging DNS matters, begin by way of to ensure that the host the place the dnsmasq strategy for that example runs is ready to safely get to the bottom of. If the host can't unravel, then the cases won’t have the capacity to both. a short approach to money even if DNS is operating is to solve a hostname inside of your example by utilizing the host command. If DNS is operating, you want to see: $ host openstack. org openstack. org has tackle 174. 143. 194. 225 openstack. org mail is dealt with through 10 mx1. emailsrvr. com. openstack. org mail is dealt with by way of 20 mx2. emailsrvr. com. If you’re working the Cirros photograph, it doesn’t have the “host” application put in, within which case you should use ping to attempt to entry a laptop by means of hostname to work out no matter if it resolves. If DNS is operating, the 1st line of ping will be: $ ping openstack. org PING openstack. org (174. 143. 194. 225): fifty six info bytes If the example fails to solve the hostname, you will have a DNS challenge.

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