Category Archives: Networking

fedora 11 – LAMP install

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Setting up LAMP on fedora 11… First install the required modules.

yum install -y httpd.i586 mysql.i586 mysql-server.i586 php.i586 php-mysql.i586 php-gd.i586

Next i’m copying my web source from another linux machine. I’ve run these commands from the destination machine…

cd /var/www/html

rsync -ave ssh 192.168.9.10:/var/www/html/ .

Now my mysql data…

cd /var/lib/mysql

rsync -ave ssh 192.168.9.10:/var/lib/mysql/ .

Accept the certificate and enter the source root password. Next fire up the services…  I usually just go into “setup” then “system services” and enable both httpd and mysqld

Reboot. Done

Opensolaris : Citrix XenServer / ESX – Hooking into ZFS

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To share your zfs pool via NFS (that works with Citrix Xen / ESX) to a host called “esxhost”;

zfs set sharenfs=rw,nosuid,root=esxhost tank/nfs

Note : You MUST have a resolvable name from the opensolaris box. i.e. you should be able to ping it. I have tried with ip’s only and it will fail. I have edited the /etc/hosts file to include the following line for my config;

# Copyright 2007 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
# ident “%Z%%M% %I% %E% SMI”
#
# Internet host table
#
192.168.9.120 esxhost

This also requires that you are using both DNS and Files in your /etc/nsswitch.conf file. You should have a line like so;

# You must also set up the /etc/resolv.conf file for DNS name
# server lookup. See resolv.conf(4). For lookup via mdns
# svc:/network/dns/multicast:default must also be enabled. See mdnsd(1M)
hosts: files dns mdns

# Note that IPv4 addresses are searched for in all of the ipnodes databases
# before searching the hosts databases.
ipnodes: files dns mdns

i’ve also run this before hand; (to allow full access)

chmod -R 777 /tank/nfs

Update : check this guide http://blog.laspina.ca/ubiquitous/running-zfs-over-nfs-as-a-vmware-store

Update 2: there are known issues with waiting for sync when using both NFS and ZFS together…. There are reasons why you shouldnt do this, but in a test enviornemnt disabling sync at ZFS level may help performance (zfs set sync=disabled)

I like this idea of spliting up your SSD too… again in test enviornment no problems, in production i would utilize the entire drive to the tasks https://blogs.oracle.com/ds/entry/make_the_most_of_your

opensolaris – jumbo frames

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If your keen on enabling jumbo frames in opensolaris this is the way…

http://docs.sun.com/app/docs/doc/819-6990/gdyqk?l=en&a=view

# dladm show-phys
LINK       MEDIA        STATE     SPEED     DUPLEX     DEVICE
net0       ether        up        100Mb     full       bge0
itops1     ether        up        100Mb     full       qfe3
web1       ether        up        100Mb     full       bge1
# dladm show-linkprop -p mtu web1
LINK     PROPERTY     VALUE     DEFAULT     POSSIBLE
web1     mtu          1500      1500        —
# ifconfig web1 unplumb
# dladm set-linkprop -p mtu=9000 web1
# ifconfig web1 plumb 10.10.1.2/24 up
# dladm show-link web1
LINK     CLASS     MTU      STATE     OVER
web1     phys      9000     up        —
dladm show-phys
LINK       MEDIA        STATE     SPEED     DUPLEX     DEVICE
net0       ether        up        100Mb     full       bge0
itops1     ether        up        100Mb     full       qfe3
web1       ether        up        100Mb     full       bge1

dladm show-linkprop -p mtu web1
LINK     PROPERTY     VALUE     DEFAULT     POSSIBLE
web1     mtu          1500      1500        —

ifconfig web1 unplumb
dladm set-linkprop -p mtu=9000 web1
ifconfig web1 plumb 10.10.1.2/24 up

dladm show-link web1
LINK     CLASS     MTU      STATE     OVER
web1     phys      9000     up        —
Done.
Note: this is not something that i would recommend or currently use. I prefer trunking two nics to give additional performance. https://sigtar.com/2009/07/20/opensolaris-network-teaming/

Using W2k3 R2 / W2k8 server as a NFS share for vmware

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This is something i do in the lab so all of my vm’s are able to access iso’s etc (very handy for quick builds). Quite handy doing it through windows since its easiey enough to setup a windows network share to the same location and update various files via that.

This site has some good clear instructions : http://vmetc.com/2008/02/19/create-a-nfs-share-for-vm-iso-files-with-windows-2003-server-r2/

  1. On the Windows 2003 Server make sure “Microsoft Services for NFS” in installed. If not you need to add it under Add/Remove Programs, Windows
    Components, Other Network File and Print Services
  2. Next go to folder you want to share and right-click on it and select Properties
  3. Click on the NFS Sharing tab and select “Share this Folder”
  4. Enter a Share Name, check “Anonymous Access”
  5. In VirtualCenter, select your ESX server and click the “Configuration” tab and then select “Storage”
  6. Click on “Add Storage” and select “Network File System” as the storage type
  7. Enter the Windows Server name, the folder (share) name and a descriptive Datastore Name
  8. Done. Now you can map CD iso’s to your various vm’s.

 

This is similar in windows 2008 — screenshots of settings below…

VirtualBox – Dup on ping

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I’ve had this with certain kernels (2009.06) on opensolaris. Seems there is some incompatibility between some kernels and the opensolaris virtualbox network emulation. This only seems to effect linux virtual guests.

When you try to ping an address you get something like this…

[root@VA-DHCPWEB ~]# ping 192.168.9.15
PING 192.168.9.15 (192.168.9.15) 56(84) bytes of data.
64 bytes from 192.168.9.15: icmp_seq=1 ttl=128 time=1.85 ms
64 bytes from 192.168.9.15: icmp_seq=1 ttl=127 time=1.88 ms (DUP!)

I usually forward a port from my dsl router through to a VM, but it does not like it when the network is performing as above. I’m yet to find a permanent fix other than dropping back a kernel level.

I have no VLANs configured, and just have a single unmanaged switch on a single subnet. There is only a single nic configured on the virtual guest. Found this, but didn’t seem to resolve my issues. http://www.virtualbox.org/ticket/2713

If i ping the IP of the vm host it does not have the DUP packets, so it seems to be anything beyond the host adapter.

Update: This problem seemed to show itself with the new kernel / updates on the 2009.06 release of opensolaris. I’ve reverted back to 2008.11 and all seems to be working fine again. It may have something to do with project crossbow (new virtualization around the networking space) http://www.opensolaris.com/use/ProjectCrossbow.pdf