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The docs repo for material on deploying Cloud Foundry
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Why are such large disk sizes required? (instance flavors for CF on OpenStack) #179

Closed kinjelom closed 7 years ago

kinjelom commented 7 years ago

In this doc docs-deploying-cf/openstack/required-flavors.html.md.erb is written:

[...] flavors must have the following listed specifications, at minimum:

Flavor Name VCPUs RAM (GB) Root Disk (GB) Ephemeral Disk (GB)
m1.small 1 2 10 20
m1.medium 2 4 10 40
m1.large 4 8 10 80
m1.xlarge 8 16 10 160

I found that when I reduce flavors disk sizes to these values:

Flavor Name VCPUs RAM (GB) Root Disk (GB) Ephemeral Disk (GB)
m1.small 1 2 4 4
m1.medium 2 4 4 8
m1.large 4 8 4 16
m1.xlarge 8 16 4 32

then instances disks usage in my deployment look like this (bosh instance --ps):

Instance RAM Usage Swap Usage System Disk Usage Ephemeral Disk Usage Persistent Disk Usage
api_z1 10% (838MB) 0% 29% (23i%) 6% (5i%) -
blobstore_z1 3% (134MB) 0% 29% (23i%) 3% (1i%) 0% (0i%)
clock_z1 7% (290MB) 0% 29% (23i%) 12% (10i%) -
consul_z1 5% (95MB) 0% 29% (23i%) 5% (3i%) 0% (0i%)
doppler_z1 4% (142MB) 0% 29% (23i%) 4% (1i%) -
etcd_z1 2% (168MB) 0% 29% (23i%) 2% (1i%) 0% (0i%)
ha_proxy_z1 3% (117MB) 0% 29% (23i%) 3% (1i%) -
loggregator[...]_z1 5% (100MB) 0% 29% (23i%) 6% (3i%) -
nats_z1 3% (109MB) 0% 29% (23i%) 3% (1i%) -
postgres_z1 3% (140MB) 0% 29% (23i%) 4% (3i%) 2% (1i%)
router_z1 3% (114MB) 0% 29% (23i%) 3% (2i%) -
stats_z1 6% (125MB) 0% 29% (23i%) 13% (6i%) -
uaa_z1 18% (711MB) 0% 29% (23i%) 13% (2i%) -

Why are such large disk sizes required by default? Doesn't it slow down IaaS operations?

cf-gitbot commented 7 years ago

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/151215943

The labels on this github issue will be updated when the story is started.

cf-pub-tools commented 7 years ago

Hi @wildloop

This documentation repository is maintained by technical writers, not developers or support engineering.

If you have questions about the open source Cloud Foundry project, we recommend that you contact the cf-dev@lists.cloudfoundry.org mailing list.

For questions about Pivotal Cloud Foundry, please contact Pivotal support: https://support.pivotal.io

Thank you.

kinjelom commented 7 years ago

Thanks, There are the flavors with the new names and configuration (cf-deployment): https://github.com/cloudfoundry/cf-deployment/tree/master/iaas-support/openstack