airship/vino
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README update for hugepages

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This PS adds notes on host-level hugepages configuration to
the VINO readme.

Change-Id: I0a6760f3985d1a7d83939401a89c32886616de22
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Crank, Daniel (dc6350) 2021-04-05 13:44:39 -05:00
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@ -70,6 +70,64 @@ USE_PROXY=true
10.96.0.0/12 is the Kubernetes service CIDR. 10.96.0.0/12 is the Kubernetes service CIDR.
#### Configure hugepages support
The default vino-builder VM flavors use 1G hugepages. To ensure hugepages support is configured
correctly at the host level, do the following:
For Ubuntu 18.04 and earlier, install the 'hugepages' package:
```
# sudo apt install hugepages
```
For later ubuntu versions, install the 'libhugetlbfs-bin' package:
```
# sudo apt install libhugetlbfs-bin
```
Then run:
```
# hugeadm --explain
```
This will display a block like the following describing the current hugepages configuration:
```
Total System Memory: 96676 MB
Mount Point Options
/dev/hugepages rw,relatime,pagesize=1024M
Huge page pools:
Size Minimum Current Maximum Default
1073741824 64 64 64 *
```
In the example above, pagesize=1024M indicates a default 1GB page size for the /dev/hugepages
mount, and 64 pages are preallocated for 64GB available memory. If the default pagesize is other
than 1024M or the number of preallocated pages is insufficient for the subcluster VMs to be
created, add the parameters default_hugepagesz, hugepagesz and hugepages to the end of
GRUB_CMDLINE_LINUX_DEFAULT in your host's grub config file. For example,
```
# Set the default commandline
GRUB_CMDLINE_LINUX_DEFAULT="console=tty1 console=ttyS0 default_hugepagesz=1G hugepagesz=1G hugepages=64"
```
(In a typical Ubuntu installation, the grub configuration can usually be found at /etc/default/grub or
somewhere under /etc/grub.d. If the host is a VM built from a cloud image, the grub config may be found
at /etc/default/grub.d/50-cloudimg-settings.cfg.)
After making changes, run the following to make them take effect:
```
sudo update-grub
sudo reboot now
```
### Deploy ViNO ### Deploy ViNO
Airship projects often have to deploy Kubernetes, with common requirements such as supporting Airship projects often have to deploy Kubernetes, with common requirements such as supporting