Difference between revisions of "User:Dennisvd@nikhef.nl/testbed"
From PDP/Grid Wiki
Jump to navigationJump to search| Line 2: | Line 2: | ||
bleek, toom, kudde and span. | bleek, toom, kudde and span. | ||
| − | {| class="wikitable" | + | {| class="wikitable" border="0" cellpadding="8" |
| − | |- | + | |-style="background-color: #ccc;" |
! name | ! name | ||
! type | ! type | ||
! #cores | ! #cores | ||
! mem | ! mem | ||
| + | ! OS | ||
| + | ! disk | ||
! remarks | ! remarks | ||
|- | |- | ||
| Line 14: | Line 16: | ||
| 4 | | 4 | ||
| 8GB | | 8GB | ||
| − | | High Availability, dual power supply | + | | CentOS4-64 |
| + | | software raid1 2×500GB disks | ||
| + | | High Availability, dual power supply | ||
|- | |- | ||
| toom | | toom | ||
| Line 20: | Line 24: | ||
| 8 | | 8 | ||
| 16GB | | 16GB | ||
| − | | Hardware raid1 | + | | CentOS5-64 |
| + | | Hardware raid1 2×715GB disks | ||
|- | |- | ||
| kudde | | kudde | ||
| Line 26: | Line 31: | ||
| 8 | | 8 | ||
| 16GB | | 16GB | ||
| − | | Hardware raid1 | + | | CentOS5-64 |
| + | | Hardware raid1 2×715GB disks | ||
|- | |- | ||
| span | | span | ||
| Line 32: | Line 38: | ||
| 8 | | 8 | ||
| 24GB | | 24GB | ||
| − | | Hardware raid10 on | + | | CentOS5-64 |
| + | | Hardware raid10 on 4×470GB disks (950GB net) | ||
| + | | DHCP,DNS,NFS,LDAP | ||
|} | |} | ||
| + | |||
| + | The network between these machines is a bit particular: They all live in the same VLAN (194.171.96.16/28) but they all have an extra alias interface in the 10.198.0.0/16 range. The Xen DomUs on each of the Xen machines that live in that address range are given connectivity to the other DomUs in the same VLAN without using NAT, and connectivity to the outside with SNAT. Here's an example of the iptables on span: | ||
| + | Chain POSTROUTING (policy ACCEPT 58M packets, 3693M bytes) | ||
| + | pkts bytes target prot opt in out source destination | ||
| + | 0 0 ACCEPT all -- any any 10.198.0.0/16 194.171.96.16/28 | ||
| + | 436 63986 ACCEPT all -- any any 10.198.0.0/16 10.198.0.0/16 | ||
| + | 1 190 SNAT all -- any any 10.198.0.0/16 anywhere to:194.171.96.28 | ||
| + | |||
| + | So all traffic from a DomU on span will appear to have come from span to the outside. | ||
| + | |||
| + | Note that DomUs that have interfaces in the public address range do not need SNAT at all, they simply connect to the hosts xen bridge. | ||
Revision as of 20:15, 30 March 2009
The testbed currently consists of four physical machines: bleek, toom, kudde and span.
| name | type | #cores | mem | OS | disk | remarks |
|---|---|---|---|---|---|---|
| bleek | Intel 5150 @ 2.66GHz | 4 | 8GB | CentOS4-64 | software raid1 2×500GB disks | High Availability, dual power supply |
| toom | Intel E5440 @ 2.83GHz | 8 | 16GB | CentOS5-64 | Hardware raid1 2×715GB disks | |
| kudde | Intel E5440 @ 2.83GHz | 8 | 16GB | CentOS5-64 | Hardware raid1 2×715GB disks | |
| span | Intel E5440 @ 2.83GHz | 8 | 24GB | CentOS5-64 | Hardware raid10 on 4×470GB disks (950GB net) | DHCP,DNS,NFS,LDAP |
The network between these machines is a bit particular: They all live in the same VLAN (194.171.96.16/28) but they all have an extra alias interface in the 10.198.0.0/16 range. The Xen DomUs on each of the Xen machines that live in that address range are given connectivity to the other DomUs in the same VLAN without using NAT, and connectivity to the outside with SNAT. Here's an example of the iptables on span:
Chain POSTROUTING (policy ACCEPT 58M packets, 3693M bytes)
pkts bytes target prot opt in out source destination
0 0 ACCEPT all -- any any 10.198.0.0/16 194.171.96.16/28
436 63986 ACCEPT all -- any any 10.198.0.0/16 10.198.0.0/16
1 190 SNAT all -- any any 10.198.0.0/16 anywhere to:194.171.96.28
So all traffic from a DomU on span will appear to have come from span to the outside.
Note that DomUs that have interfaces in the public address range do not need SNAT at all, they simply connect to the hosts xen bridge.
