Merge branch '8222-spike-investigate-why-xz-packaging-on-rpm-platforms-has-poor-performance' into 'master'

Use XZ compression for RPM packages

Closes #8222

See merge request https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/7184

Merged-by: Robert Marshall <[email protected]>
Approved-by: Clemens Beck <[email protected]>
Approved-by: Robert Marshall <[email protected]>
Reviewed-by: Clemens Beck <[email protected]>
Co-authored-by: Ryan Egesdahl <[email protected]>

Author: Robert Marshall

Gemfile.lock

@@ -1,7 +1,7 @@
 GIT
   remote: https://gitlab.com/gitlab-org/omnibus.git
-  revision: 358f4af204fe9b2899ab99e0c8975b97c13dddf5
-  tag: 9.0.19.0
+  revision: bed44a1bd07586f2338ffc04e9fc25b74154ad63
+  tag: 9.0.19.1
   specs:
     omnibus (9.0.19)
       aws-sdk-s3 (~> 1.116.0)

OMNIBUS_GEM_VERSION

@@ -1 +1 @@
-9.0.19.0
+9.0.19.1

config/projects/gitlab.rb

@@ -277,7 +277,7 @@
   signing_passphrase Gitlab::Util.get_env('GPG_PASSPHRASE')
 
   # Enable XZ compression if selected
-  compress_xz = Gitlab::Util.get_env('COMPRESS_XZ') || 'false'
+  compress_xz = Gitlab::Util.get_env('COMPRESS_XZ') || 'true'
   if compress_xz == 'true'
     compression_type :xz
     compression_level 6

doc/build/build_package.md

@@ -66,17 +66,14 @@ project's [Container Registry](https://gitlab.com/gitlab-org/gitlab-omnibus-buil
 
 1. By default, XZ compression is used to produce the final DEB package,
    which reduces the package size by nearly 30% in comparison to Gzip, with
-   little to no increase in build time. However, the system's package
-   manager must also support the format. If your system's package manager does
-   not support XZ packages, set the `COMPRESS_XZ` environment variable to `false`:
+   little to no increase in build time and a slight increase in installation
+   (decompression) time. However, the system's package manager must also support
+   the format. If your system's package manager does not support XZ packages,
+   set the `COMPRESS_XZ` environment variable to `false`:
 
    ```shell
    export COMPRESS_XZ=false
    ```
-   
-   NOTE: This is feature is disabled by default on RPM platforms due to an
-   as-yet-unexplained increase in packaging time. It can be enabled by setting
-   the `COMPRESS_XZ` environment variable to `true`.
 
 1. Install the libraries and other dependencies: