Gas Pump Meter
I saw this guy testing the meters on the gas pumps today and asked him a few questions. You’d be happy to know about this:
Q1) Does it really make any difference if you pump gas slowly or quickly? I’ve heard you get more gas if you are not in a hurry.
A1) Yes. The gas pumps are not tuned for slow delivery levels and will “leak” a little extra gas when run at the minimum delivery rate.
Q2) Does gas actually compress at night when it’s cold?
A2) Yes. See the Seraphin picture for the actual math formula to compute the change in volume based on temperature. For best results – pump your gas at night or early morning when the ground temp is lowest.
#openstack training and certification #jobs demand exceed supply
PistonCloud Training Available
Rackspace Certification Program
Heat RefStack Reference Architecture
We’re in trouble. We’re facing an unprecedented shortage of IT talent in cloud, and in this case, specifically within OpenStack.
Full price of the course is $1,995.
Piston Cloud has launched a unique training program aimed at helping organizations get off the ground with OpenStack. Our next class, “Deploying OpenStack for Cloud Administrators,” is scheduled for May 8th and 9th here in San Francisco.
The course is ideal for IT managers, VMware administrators, and cloud architects, and features a blend of keynotes and hands-on lab work. Attendees will learn directly from the seasoned engineers who built Piston Enterprise OpenStack, and leave with a deep and comprehensive understanding of the technology, as well as many insider tips and tricks to get their own private cloud deployment off the ground. The two-day course includes:
Keynote from Piston Cloud CTO Joshua McKenty: A History of Cloud Computing
Session: Opinionated Architecture and the True Cloud
Lab: Installation and Configuration of an OpenStack Private Cloud
Lab: An Introduction to Account Creation and Administration
Session: Introduction to OpenStack Compute (Nova)
Lab: Hands-on with Instance Management and Migration
Wrap-up and Q&A
Dinner and an evening outing
Session: An Introduction to Image Management (Glance)
Lab: Working with Images
Lab: Hands-on with OpenStack Block Storage (Cinder)
Lab: OpenStack Object Storage (Swift)
Lab: Enterprise Features
Closing Wrap-up and Q&A
Rackspace Certified Technician for OpenStack
IT Professionals earn this certification after demonstrating the skills necessary to utilize and operate an OpenStack cloud.
Create instances from images, snapshots and volumes
Inject user data and files into an instance
Connect to instances via SSH and VNC
Inject a keypair into an instance and access the instance with that keypair
Set metadata on an instance
Create an instance snapshot
Pause, suspend, stop, rescue, resize, rebuild, reboot an instance
Manage volumes and volume snapshots
Manage security groups
Assign IP Addresses to an instance
View Object Storage account information
Set Object Storage account metadata
Manage Object Storage containers
Set Object Storage metadata
Set Object Storage access control lists
Set Object Storage container sync
Set Object Storage container versioning
Set Object Storage static web
Upload, list, download and delete objects
Create Temporary URL’s
Create form posts
List Identity Service catalog
Get auth tokens
Discover keystone endpoints
Reference Architecture – #refstack http://openstacksummitapril2013.sched.org/event/33821a13f4bf25259ec9e77bba9b1e51#.UXArzCtATEA
The OpenStack project does an insane amount of automated testing as part of the development cycle, but up until now there has been no corresponding testing that can be performed against running public clouds. While we want to do that, before we can test other people’s clouds for compatibility, we need to be able to express what it is they need to be compatible with.
It turns out that OpenStack is rich enough now to express a reference implementation in terms of itself, using heat templates. Some people think that’s a great end to itself – deploy your OpenStack using OpenStack – but others are not quite as sure about that yet, and have significant investment in things like chef, puppet, crowbar or cobbler. To meet the needs of expressing a useful set of testable information and not leave that specification as an academic exercise, or as the recipient of more tool wars – we’ve come up with a plan to have the heat templates describe the state, the “what” if you will, and to describe a clear boundary line across which metadata is passed to the tools on the individual nodes that will turn that metadata into configuration.
Add a Backup Disk to Linux VM ext4 Centos 5
Edit the VM Settings
add the disk to the VM
yum install e4fsprogs
Disk /dev/sdb: 60.1 GB, 60129542144 bytes
Disk /dev/sdb doesn’t contain a valid partition table
n – create new partition
2 – use partition number 2
w – write partition table
/sbin/mkfs.ext4 -L /backup /dev/sdb2
mount -t ext4 /dev/sdb2 /backup
Add the following line to etc/fstab
/dev/sdb2 /backup ext4 defaults 1 2
change the zimbra backups to go to new directory
su zimbra -
zmprov gacf zimbraBackupTarget
zmprov mcf zimbraBackupTarget /backup
zmprov gacf zimbraBackupTarget
Here’s the situation…
You have a machine and you want to test out openstack. You can provision and run windows VMs with an Ubuntu server acting as a hypervisor. Here are some of the ingredients you will need along with some instructions and tips. This is a work in progress so it’s not yet complete.
To temporarily configure an IP address, you can use the ifconfig command in the following manner. Just modify the IP address and subnet mask to match your network requirements.
sudo ifconfig eth0 10.0.0.100 netmask 255.255.255.0
To verify the IP address configuration of eth0, you can use the ifconfig command in the following manner.
eth0 Link encap:Ethernet HWaddr 00:15:c5:4a:16:5a
inet addr:10.0.0.100 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::215:c5ff:fe4a:165a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:466475604 errors:0 dropped:0 overruns:0 frame:0
TX packets:403172654 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:2574778386 (2.5 GB) TX bytes:1618367329 (1.6 GB)
To configure a default gateway, you can use the route command in the following manner. Modify the default gateway address to match your network requirements.
sudo route add default gw 10.0.0.1 eth0
To verify your default gateway configuration, you can use the route command in the following manner.
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
0.0.0.0 10.0.0.1 0.0.0.0 UG 0 0 0 eth0
If you require DNS for your temporary network configuration, you can add DNS server IP addresses in the file /etc/resolv.conf. The example below shows how to enter two DNS servers to /etc/resolv.conf, which should be changed to servers appropriate for your network. A more lengthy description of DNS client configuration is in a following section.
If you no longer need this configuration and wish to purge all IP configuration from an interface, you can use the ip command with the flush option as shown below.
ip addr flush eth0
Flushing the IP configuration using the ip command does not clear the contents of /etc/resolv.conf. You must remove or modify those entries manually.
via Network Configuration.
Someone sent me a connection request saying they know me or work with me but I’m pretty sure they don’t. These guys shouldn’t be mis-representing them selves on line. It lowers the trust we have in “the system”. What can I do?
- Use the Help Center link in the lower left of your screen to contact customer service.
- More serious messages that might be illegal should be emailed to email@example.com.
- If it’s an invitation you can sign in to linkedin, click on the response “I Don’t Know this person”.
Once someone has received 5 IDKs, the account is restricted
- My favorite method is to click the report spam button to the right of the message in your inbox.
You do have to sign in to linkedin to do this. See the picture on the right as an example.
troubleshooting arp mac esxi vmkernel storage
The guys were getting some new storage setup and had the IP address set incorrectly. Usually a vmkping would be enough to prove the vmkernel interfaces were setup correctly but the vendor came back with “the firewall is blocking NFS” so I needed a way to see the ARP table to prove the MAC for the NAS was showing up on the correct VMK interface with no gateway in the data path.
This was tested to work on latest ESXi version 5 build 469512.
Here are the results:
~ # vmkping 10.2.150.104
PING 10.42.150.104 (10.2.150.104): 56 data bytes
64 bytes from 10.2.150.104: icmp_seq=0 ttl=64 time=0.201 ms
64 bytes from 10.2.150.104: icmp_seq=1 ttl=64 time=0.187 ms
— 10.42.150.104 ping statistics —
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 0.187/0.194/0.201 ms
~ # esxcfg-vmknic -l
Interface Port Group/DVPort IP Family IP Address Netmask Broadcast MAC Address MTU TSO MSS Enabled Type
vmk0 Management Network IPv4 220.127.116.11 255.255.255.248 18.104.22.168 00:25:90:52:91:21 1500 65535 true STATIC
vmk1 VMkernel-152 IPv4 10.2.152.158 255.255.255.0 10.2.152.255 00:50:56:76:23:45 1500 65535 true STATIC
vmk2 VMkernel-150 IPv4 10.2.150.158 255.255.255.0 10.2.150.255 00:50:56:70:34:56 1500 65535 true STATIC
~ # esxcli network ip neighbor list
Neighbor Mac Address Vmknic Expiry State
————– —————– —— ————– —–
10.2.150.104 00:50:56:2a:12:34 vmk2 993 sec
Displaying the ARP and Neighbor Discovery cache for VMkernel network interfaces
I just started testing the cool new HP Cloud which is in beta right now. While you can’t create or upload your own machine templates you can choose from some popular open source choices (all 64 bit os):
What virtualization technology does HP Cloud Compute use?
HP Cloud Compute is based on KVM virtualization technology.
What instance types are available for HP Cloud Compute?
Standard instances offer a number of virtual server types. Select the size that’s right for you based on the amount of memory, number of virtual cores, and local storage required. Although you won’t be billed during the beta I imagine once they do stop billing you the choice you make here could have an impact on your pocketbook.
|Standard Instance Types
||# of Virtual Cores
||Local Disk (GB)
|Double Extra Large
Creating a Keypair is the first necessary step in launching an instance for the first time. Only one keypair is needed for a series of instances launched under that keypair name.
The Keypair creation menu is located on the left side of the “keypair” dropdown of the AZ’s management page:
A separate keypair must be generated for each AZ (Availability Zone)
After entering the keypair management page, type a name for the keypair, then click “Create”.
Once the keypair has been created, a black text brick appears below. Copy and paste the entire text field.
Save it within a word processing document (notepad, text edit, word, etc.) and rename the file with a .pem extension. This allows use of the file by HP Cloud’s compute instances to identify the authorized user in part.
Once you have created a keypair, you can then enter your instance. Please see our Creating an instance and connect with Putty guide for further steps to gain access to your instance.
Create PEM file on Mac OS X
Open a terminal window
vi testkeypair.pem , press i to insert, copy and paste the text from above into the terminal, esc, :wq to save the file and quit vi
chmod 400 testkeypair.pem
Add a Public IP address to your VM
Be sure to go back and click the check box for this.
Login with SSH
ssh -i testkeypair.pem your-servers-public-ip-address
Setup IPv6 on your VM
Possibility is the condition or fact of being possible. The Latin origins of the word hint at ability. Possibility also refers to something that “could happen”, that is not precluded by the facts, but usually not probable. Impossible denotes that something literally cannot happen or be done.
Probability, or chance, is a way of expressing knowledge or belief that an event will occur or has occurred. In mathematics the concept has been given an exact meaning in probability theory, that is used extensively in such areas of study as mathematics, statistics, finance, gambling, science, and philosophy to draw conclusions about the likelihood of potential events and the underlying mechanics of complex systems.
Plausible deniability is, at root, credible (plausible) ability to deny a fact or allegation, or to deny previous knowledge of a fact. The term most often refers to the denial of blame in (formal or informal) chains of command, where upper rungs quarantine the blame to the lower rungs, and the lower rungs are often inaccessible, meaning confirming responsibility for the action is nearly impossible. In the case that illegal or otherwise disreputable and unpopular activities become public, high-ranking officials may deny any awareness of such act or any connection to the agents used to carry out such acts. It typically implies forethought, such as intentionally setting up the conditions to plausibly avoid responsibility for one’s (future) actions or knowledge.
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VIA.NET – VMAN
Product: VMAN Fiber broadband
Term: 3 Years
Speed: 50 Mbits
Sonic.net Elite-S DSL
Download Speed: 3.0mbps – 6.0mbps
Upload Speed: 512kbps – 768kbps
IP Addresses: 8 Static (More Info <http://www.sonic.net/features/staticip/>)
Routed Subnets (DSL)
Several Sonic.net DSL offerings include blocks of static, bridged IP addresses. For some purposes, including larger networks or more advanced networking, it is advantageous to have more than 8 static IPs on a routed subnet.
|Number of IPs
Prices reflect a one-time setup fee. Routed subnets are only available on Basic-S, Express-S, Pro-S, and Elite-S DSL circuits.
1.5-30 Mbps Business Class connection
starting at $229
FlexLink’s next generation network uses Ethernet in the First Mile to deliver new lower price points for higher speeds:
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Comcast Business Cable
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|Static IP AddressRefers to an unchanging or permanent Internet address code. Comcast can provide Static IP addresses to businesses that have their own IDS (Intrusion Detection System) or firewall.
1 – $14.95/mo.,
5 – $19.95/mo.,
13 – $34.95/mo.
||Monthly Recurring Charge for Static IP
||Monthly Recurring Charge for Dynamic IP
|Up to 15 Mbps / 5 Mbps
|Up to 25 Mbps / 25 Mbps
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|Up to 150 Mbps / 35 Mbps
Early termination fees, eligibility restrictions, activation and other fees, taxes, charges, software limitations and other terms apply. FiOS Verizon Wi-Fi available in select areas in the U.S. with qualifying packages. Actual speeds may vary. Battery back-up for standard fiber-based voice service and E911 (but not Voice over IP) for up to eight hours.*
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