defaults, migrations: host-containers default version bumps and migrations

[etungsten]

Issue number:
N/A

Description of changes:

Author: Erikson Tung <[email protected]>
Date:   Tue Aug 11 15:40:09 2020 -0700

    defaults: update default versions for host containers
    
    Set default admin container version to v0.5.1
    Set default control container version to v0.4.1

Author: Erikson Tung <[email protected]>
Date:   Tue Aug 11 13:04:30 2020 -0700

    migrations: host-containers default version migrations
    
    Migrates default version for the admin container from v0.5.0 to v0.5.1
    Migrates default version for the control container from v0.4.0 to v0.4.1

Testing done:
Created a local datastore for testing purposes with storewolf.
For the admin container migration:

Initial admin.source.template and admin.source

$ cat ~/thar/testing/ds/current/live/settings/host-containers/admin/source
"328549459982.dkr.ecr.us-west-2.amazonaws.com/bottlerocket-admin:v0.5.0"
$ cat ~/thar/testing/ds/current/live/settings/host-containers/admin/source.template 
"328549459982.dkr.ecr.{{ settings.aws.region }}.amazonaws.com/bottlerocket-admin:v0.5.0"

Run the admin container forward migration:

     Running `migrate-admin-container-v0-5-1 --source-datastore ~/thar/testing/ds/current --target-datastore ~/thar/testing/ds/next --forward`
Updating template and value of 'settings.host-containers.admin.source' on upgrade
Changing template of 'settings.host-containers.admin.source' from '328549459982.dkr.ecr.{{ settings.aws.region }}.amazonaws.com/bottlerocket-admin:v0.5.0' to '328549459982.dkr.ecr.{{ settings.aws.region }}.amazonaws.com/bottlerocket-admin:v0.5.1'
Changing value of 'settings.host-containers.admin.source' from '328549459982.dkr.ecr.us-west-2.amazonaws.com/bottlerocket-admin:v0.5.0' to '328549459982.dkr.ecr.us-west-2.amazonaws.com/bottlerocket-admin:v0.5.1'
Found no 'settings.host-containers.admin.source' to change on upgrade

See that the admin.source.template and admin.source got updated:

$ cat ~/thar/testing/ds/next/live/settings/host-containers/admin/source
"328549459982.dkr.ecr.us-west-2.amazonaws.com/bottlerocket-admin:v0.5.1"
$ cat ~/thar/testing/ds/next/live/settings/host-containers/admin/source.template "328549459982.dkr.ecr.{{ settings.aws.region }}.amazonaws.com/bottlerocket-admin:v0.5.1"

Run the admin container backward migration:

$ VARIANT=aws-k8s-1.17 cargo run -- --source-datastore ~/thar/testing/ds/next --target-datastore ~/thar/testing/ds/next-backward --backward
Updating template and value of 'settings.host-containers.admin.source' on downgrade
Changing template of 'settings.host-containers.admin.source' from '328549459982.dkr.ecr.{{ settings.aws.region }}.amazonaws.com/bottlerocket-admin:v0.5.1' to '328549459982.dkr.ecr.{{ settings.aws.region }}.amazonaws.com/bottlerocket-admin:v0.5.0'
Changing value of 'settings.host-containers.admin.source' from '328549459982.dkr.ecr.us-west-2.amazonaws.com/bottlerocket-admin:v0.5.1' to '328549459982.dkr.ecr.us-west-2.amazonaws.com/bottlerocket-admin:v0.5.0'
Found no 'settings.host-containers.admin.source' to change on downgrade

See that the admin.source.template and admin.source are back to their original values:

$ cat ~/thar/testing/ds/next-backward/live/settings/host-containers/admin/source.template 
"328549459982.dkr.ecr.{{ settings.aws.region }}.amazonaws.com/bottlerocket-admin:v0.5.0"
$ cat ~/thar/testing/ds/next-backward/live/settings/host-containers/admin/source 
"328549459982.dkr.ecr.us-west-2.amazonaws.com/bottlerocket-admin:v0.5.0"

Same test results for the control container migration.

Will flip from draft mode once bottlerocket-os/bottlerocket-control-container#5 (review) and bottlerocket-os/bottlerocket-admin-container#12 are merged and ready.

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[bcressey]

nit: "contaienr" typo in the default version migrations commit

[etungsten]

Fixes typo in commit message.