Archive for March 2016

OpenStack Neutron – Expand and / or update floating IP range

Sometimes you run out of public IP addresses and need to expand the floating IP range. If a non-interrupted range is available to expand into from the current range simply use:

neutron subnet-update –allocation-pool start=<original-start-ip>,end=<new-end-ip>

This will overwrite the existing range and expand it to the new end-IP.

To add an extra, separate IP range while still keeping the original range, use:

neutron subnet-update <subnet-id> –allocation-pool start=<original-start-ip>,end=<original-end-ip> –allocation-pool start=<additional-start-ip>,end=<additional-end-ip>

Example of extending a continuous IP range:

[root@c6320-n1 ~(keystone_admin)]# neutron subnet-list
+--------------------------------------+--------------+----------------+----------------------------------------------------+
| id                                   | name         | cidr           | allocation_pools                                   |
+--------------------------------------+--------------+----------------+----------------------------------------------------+
| 1b66dad8-2f2c-4667-9460-7729e2a68d1c | sub-pub      | 172.17.4.0/24  | {"start": "172.17.4.130", "end": "172.17.4.199"}   |
| 74c90d00-af79-4f7c-92ef-4e38231e850c | sub_priv2    | 192.168.0.0/24 | {"start": "192.168.0.40", "end": "192.168.0.50"}   |
| e6cb6f7e-5efd-42df-93e6-67ad4b056035 | sub_internal | 192.168.0.0/24 | {"start": "192.168.0.100", "end": "192.168.0.200"} |
| e47c7f4b-85ec-41e4-ad1a-cf9290a97d87 | sub_priv     | 172.16.0.0/24  | {"start": "172.16.0.100", "end": "172.16.0.200"}   |
+--------------------------------------+--------------+----------------+----------------------------------------------------+

[root@c6320-n1 ~(keystone_admin)]# neutron subnet-show 1b66dad8-2f2c-4667-9460-7729e2a68d1c
+-------------------+--------------------------------------------------+
| Field             | Value                                            |
+-------------------+--------------------------------------------------+
| allocation_pools  | {"start": "172.17.4.130", "end": "172.17.4.199"} |
| cidr              | 172.17.4.0/24                                    |
| dns_nameservers   |                                                  |
| enable_dhcp       | False                                            |
| gateway_ip        | 172.17.4.1                                       |
| host_routes       |                                                  |
| id                | 1b66dad8-2f2c-4667-9460-7729e2a68d1c             |
| ip_version        | 4                                                |
| ipv6_address_mode |                                                  |
| ipv6_ra_mode      |                                                  |
| name              | sub-pub                                          |
| network_id        | fa9fb87f-70d9-4e18-83cb-c04695cbed5a             |
| subnetpool_id     |                                                  |
| tenant_id         | 8d93e4b0f8454ad7b539d14633d72136                 |
+-------------------+--------------------------------------------------+

[root@c6320-n1 ~(keystone_admin)]# neutron subnet-update 1b66dad8-2f2c-4667-9460-7729e2a68d1c --allocation-pool start=172.17.4.130,end=172.17.4.240
Updated subnet: 1b66dad8-2f2c-4667-9460-7729e2a68d1c
[root@c6320-n1 ~(keystone_admin)]# neutron subnet-show 1b66dad8-2f2c-4667-9460-7729e2a68d1c
+-------------------+--------------------------------------------------+
| Field             | Value                                            |
+-------------------+--------------------------------------------------+
| allocation_pools  | {"start": "172.17.4.130", "end": "172.17.4.240"} |
| cidr              | 172.17.4.0/24                                    |
| dns_nameservers   |                                                  |
| enable_dhcp       | False                                            |
| gateway_ip        | 172.17.4.1                                       |
| host_routes       |                                                  |
| id                | 1b66dad8-2f2c-4667-9460-7729e2a68d1c             |
| ip_version        | 4                                                |
| ipv6_address_mode |                                                  |
| ipv6_ra_mode      |                                                  |
| name              | sub-pub                                          |
| network_id        | fa9fb87f-70d9-4e18-83cb-c04695cbed5a             |
| subnetpool_id     |                                                  |
| tenant_id         | 8d93e4b0f8454ad7b539d14633d72136                 |
+-------------------+--------------------------------------------------+
[root@c6320-n1 ~(keystone_admin)]# 
[root@c6320-n1 ~(keystone_admin)]#

Example of adding an additional range to an already existing range:

[root@c6320-n1 ~(keystone_admin)]# neutron subnet-update 1b66dad8-2f2c-4667-9460-7729e2a68d1c --allocation-pool start=172.17.4.130,end=172.17.4.199 --allocation-pool start=172.17.4.209,end=172.17.4.240
Updated subnet: 1b66dad8-2f2c-4667-9460-7729e2a68d1c
[root@c6320-n1 ~(keystone_admin)]# 
[root@c6320-n1 ~(keystone_admin)]# neutron subnet-show 1b66dad8-2f2c-4667-9460-7729e2a68d1c
+-------------------+--------------------------------------------------+
| Field             | Value                                            |
+-------------------+--------------------------------------------------+
| allocation_pools  | {"start": "172.17.4.130", "end": "172.17.4.199"} |
|                   | {"start": "172.17.4.209", "end": "172.17.4.240"} |
| cidr              | 172.17.4.0/24                                    |
| dns_nameservers   |                                                  |
| enable_dhcp       | False                                            |
| gateway_ip        | 172.17.4.1                                       |
| host_routes       |                                                  |
| id                | 1b66dad8-2f2c-4667-9460-7729e2a68d1c             |
| ip_version        | 4                                                |
| ipv6_address_mode |                                                  |
| ipv6_ra_mode      |                                                  |
| name              | sub-pub                                          |
| network_id        | fa9fb87f-70d9-4e18-83cb-c04695cbed5a             |
| subnetpool_id     |                                                  |
| tenant_id         | 8d93e4b0f8454ad7b539d14633d72136                 |
+-------------------+--------------------------------------------------+
[root@c6320-n1 ~(keystone_admin)]# 
[root@c6320-n1 ~(keystone_admin)]# 

Jellyfish at SeaWorld in Kamogawa

Raspberry Pi as Amazon S3 file uploader

Putting the Raspberry Pi to work uploading files to the Amazon S3 backup vault. Much more energy efficient compared to keeping the PC running for the same job.

Amazing how many uses this little SoC has . I’m ending up with a pile of microSD cards for all its identities 🙂

image

Cloud days at Prince park tower in Tokyo

Presenting OpenStack, Microsoft private cloud and converged solutions

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Corsair Carbide Air 540 mod

The gaming PC at home had started getting a bit old and it was time to start overclocking. That way it’d be possible to squeeze a few more months out of the machine before the inevitable upgrade. Of course with a stock Intel CPU cooler it quickly overheated. It reached 98 degrees before I had a chance to power it down 🙂

So, a trip to Akihabara got me a fairly cheap Lepa AquaChanger240 but in my hurry to get a cooler I had underestimated the size of this monster. The thickness of the cooler with fans mounted is about 5.5cm – no way it would fit in the PC case, even though it’s a full tower.

As a result I found myself looking for a new case. Overclocking clearly has its consequences. Yet another trip to Akihabara resulted in the beautiful and spacious Corsair Carbide Air 540. Awesome to look at from both the outside and inside thanks to the ease of which cables can be kept hidden in the second chamber.

Since I wanted to go with green LEDs to light it up it made sense to give it a paint job at the same time. The normally black grilles on top and front are now a bright green. The case is extremely easy to disassemble which helped a lot in removing the parts for painting.

Corsair Air 540 mod - The Hulk - 01

Corsair Air 540 mod - The Hulk - 02    Corsair Air 540 mod - The Hulk - 03

The Lepa CPU cooler works fantastically well. The processor – an Intel i7 2600k, has been clocked from the base 3.4 up to it’s current 4.6 Ghz. Even under severe stress testing the temperature stays in the 50’s.