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MGMT-2977 Cluster specific minimal iso #932

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carbonin
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@carbonin carbonin commented Jan 14, 2021

This PR allows a user to select a "minimal" iso for discovery which does not contain a rootfs. This reduces the iso size to 93M from 876M. This is required for users where the virtual media interface is significantly slower than the booted machine's network.

See coreos/fedora-coreos-tracker#661 for a larger discussion

This PR customizes the "template" minimal iso which was created in #911 by downloading the template iso, unpacking it locally, adding the ignition, and recreating the iso. A user specifies they want the minimal iso using the new API parameter (image_type) when requesting an image be generated. Installation then proceeds as it would otherwise.

Requires #930 and #931 MERGED

TODO: add tests Done, thanks @danielerez

cc @danielerez

@openshift-ci-robot openshift-ci-robot added do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. api-review Categorizes an issue or PR as actively needing an API review. labels Jan 14, 2021
@openshift-ci-robot openshift-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Jan 14, 2021
@carbonin carbonin force-pushed the cluster_specific_minimal_iso branch from 6adff31 to eaf06aa Compare January 15, 2021 14:23
@openshift-ci-robot openshift-ci-robot added the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Jan 18, 2021
@carbonin carbonin changed the title [WIP] Cluster specific minimal iso [WIP] MGMT-2977 Cluster specific minimal iso Jan 18, 2021
@danielerez danielerez force-pushed the cluster_specific_minimal_iso branch 2 times, most recently from 5e209c2 to f306878 Compare January 20, 2021 10:41
@openshift-ci-robot openshift-ci-robot removed the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Jan 20, 2021
@carbonin carbonin changed the title [WIP] MGMT-2977 Cluster specific minimal iso MGMT-2977 Cluster specific minimal iso Jan 20, 2021
@openshift-ci-robot openshift-ci-robot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Jan 20, 2021
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@avishayt Can you please take a look?

Comment on lines +2925 to +2929
type: string
description: Type of image that should be generated.
$ref: '#/definitions/image_type'
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I'm not sure it's legal to have a string with a ref?

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@danielerez danielerez Jan 21, 2021

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Seems it behaves as expected, works with 'host-stage' at least :)

assisted-service/swagger.yaml

Lines 3792 to 3794 in f557006

current_stage:
type: string
$ref: '#/definitions/host-stage'

@danielerez danielerez force-pushed the cluster_specific_minimal_iso branch from f306878 to 0942ead Compare January 21, 2021 13:42
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looks good, just one small comment

}
if err := gzipWriter.Close(); err != nil {
err = errors.Wrapf(err, "Failed to gzip ignition config")
imageBytes, err := isoeditor.IgnitionImageArchive(ignitionConfig)
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Suggested change
imageBytes, err := isoeditor.IgnitionImageArchive(ignitionConfig)
ignitionBytes, err := isoeditor.IgnitionImageArchive(ignitionConfig)

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sure, done

carbonin and others added 8 commits January 24, 2021 10:32
This adds a type enum to both the cluster image info and the
image creation parameters
This will make it easier to share between the existing logic
which creates the archive then uploads it to s3 and the new logic
which will write the archive to the fs before bundling it into the
minimal iso directly
This allows us to create the entire iso locally and skip the process
of uploading the ignition to S3
This will be a good place to add "ratelimiting" for concurrent iso
editing if that's something we need.

Additionally it makes things easier to test by giving us somewhere
to inject mock objects at the inventory API level.

Authored-by: Nick Carboni <ncarboni@redhat.com>
Extracted generate cluster minimal ISO logic to 'generateClusterMinimalISO'
function in order to avoid a cyclomatic complexity error.
@danielerez danielerez force-pushed the cluster_specific_minimal_iso branch from 0942ead to 5f447d9 Compare January 24, 2021 09:01
@openshift-ci-robot openshift-ci-robot added the lgtm Indicates that a PR is ready to be merged. label Jan 24, 2021
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: avishayt, carbonin

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/retest

Please review the full test history for this PR and help us cut down flakes.

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/retest

Please review the full test history for this PR and help us cut down flakes.

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/retest

Please review the full test history for this PR and help us cut down flakes.

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/retest

Please review the full test history for this PR and help us cut down flakes.

@openshift-bot
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/retest

Please review the full test history for this PR and help us cut down flakes.

@openshift-bot
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/retest

Please review the full test history for this PR and help us cut down flakes.

@openshift-bot
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/retest

Please review the full test history for this PR and help us cut down flakes.

@openshift-bot
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/retest

Please review the full test history for this PR and help us cut down flakes.

@openshift-bot
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/retest

Please review the full test history for this PR and help us cut down flakes.

@openshift-bot
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/retest

Please review the full test history for this PR and help us cut down flakes.

@openshift-bot
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/retest

Please review the full test history for this PR and help us cut down flakes.

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/retest

Please review the full test history for this PR and help us cut down flakes.

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/retest

Please review the full test history for this PR and help us cut down flakes.

@danielerez danielerez force-pushed the cluster_specific_minimal_iso branch from 5f447d9 to a535916 Compare January 24, 2021 16:52
@openshift-ci-robot openshift-ci-robot removed the lgtm Indicates that a PR is ready to be merged. label Jan 24, 2021
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/retest

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/lgtm

@openshift-ci-robot openshift-ci-robot added the lgtm Indicates that a PR is ready to be merged. label Jan 25, 2021
@openshift-merge-robot openshift-merge-robot merged commit 5514de2 into openshift:master Jan 25, 2021
@carbonin carbonin deleted the cluster_specific_minimal_iso branch January 25, 2021 15:01
osherdp pushed a commit to osherdp/assisted-service that referenced this pull request Jan 16, 2022
* MGMT-297 Add discovery image type

This adds a type enum to both the cluster image info and the
image creation parameters

* MGMT-2977 Move tempfile handling into create()

* MGMT-2977 Move logic for creating ignition archive to isoeditor

This will make it easier to share between the existing logic
which creates the archive then uploads it to s3 and the new logic
which will write the archive to the fs before bundling it into the
minimal iso directly

* MGMT-2977 Add the full ignition to the iso before re-creating it

This allows us to create the entire iso locally and skip the process
of uploading the ignition to S3

* MGMT-2977 Create a cluster-specific minimal iso when requested

* MGMT-2977 Create a factory interface for isoeditor

This will be a good place to add "ratelimiting" for concurrent iso
editing if that's something we need.

Additionally it makes things easier to test by giving us somewhere
to inject mock objects at the inventory API level.

Authored-by: Nick Carboni <ncarboni@redhat.com>

* MGMT-2977 extract generate cluster minimal iso logic

Extracted generate cluster minimal ISO logic to 'generateClusterMinimalISO'
function in order to avoid a cyclomatic complexity error.

* MGMT-2977 negative unit-tests for generate minimal iso

* MGMT-2977 unit-test for regenerating iso template

Added "Regenerates the iso for a new type" unit-test.

* MGMT-2977 added minimal-iso ImageType to subsystem tests

Co-authored-by: Daniel Erez <derez@redhat.com>
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6 participants