dusk/ark
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

iso: document iso cache / closures (speed!)

Browse Source
This commit is contained in:
David Arnold 2021-03-16 18:01:29 -05:00
parent 8e3777ff34
commit faa8558240
No known key found for this signature in database
GPG Key ID: 6D6A936E69C59D08
1 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
doc/start/iso.md
View File

@ -46,6 +46,18 @@ _Note: the [static link-local IPv6 address][staticLLA] and [MulticastDNS][mDNS]
configured on the live installer. If you wish to enable [MulticastDNS][mDNS] configured on the live installer. If you wish to enable [MulticastDNS][mDNS]
for your environment, you ought to configure that in a regular [profile](../../profiles)._ for your environment, you ought to configure that in a regular [profile](../../profiles)._
## ISO image nix store & cache
The iso image holds the store to the live environment and _also_ acts as a binay cache
to the installer. To considerably speed up things, the image already includes all flake
`inputs` as well as the `devshell` closures.
While you _could_ provision any machine with a single stick, a bespoke iso maximises
those local cache hits.
For hosts that don't differ too much, a common usb stick might be ok, whereas when
there are bigger differences, a bespoke usb stick will be considerably faster.
## EUI-64 LLA & Host Identity ## EUI-64 LLA & Host Identity
The iso's IPv6 Link Local Address (LLA) is configured with a static 64-bit Extended The iso's IPv6 Link Local Address (LLA) is configured with a static 64-bit Extended
@ -97,11 +109,6 @@ $ flk install NixOS --impure # use same host as above
<!-- TODO: find out why --impure is necesary / PRs welcome! --> <!-- TODO: find out why --impure is necesary / PRs welcome! -->
_Note: You _could_ install another machine than the one your iso was built for,
but the iso doesn't carry all the necesary build artifacts so the target would
start to build the missing parts on demand instead of substituting them from
the iso itself._
[manual]: https://nixos.org/manual/nixos/stable/index.html#sec-installation-partitioning [manual]: https://nixos.org/manual/nixos/stable/index.html#sec-installation-partitioning
[mDNS]: https://en.wikipedia.org/wiki/Multicast_DNS [mDNS]: https://en.wikipedia.org/wiki/Multicast_DNS
[NDP]: https://en.wikipedia.org/wiki/Neighbor_Discovery_Protocol [NDP]: https://en.wikipedia.org/wiki/Neighbor_Discovery_Protocol