create-preview¶

The create-preview command can be used to create a preview environment in your deployment config repository for a commit hash of your app repository. You can later easily delete this preview with the delete-preview command.

You need to provide some additional configuration files in your repositories for this command to work.

Configuration¶

Preview Templates¶

You have to provide a folder with the deployment configuration templates for every application you want to use this command for. By default it is assumed that this folder is located in your deployment config repository under the top-level folder .preview-templates. For example .preview-templates/app-xy for your app app-xy. The create-preview command simply copies this directory to the root of your deployment config repository and replaces e.g. image tag and route host which are specific to this preview.

deployment-config-repo/
├── .preview-templates
│   └── app-xy                        <- Can contain any files and folders
│       ├── values.yaml
│       └── some-more-config-files-or-folders
├── app-xy-production
├── app-xy-staging
├── app-xy-test
└── app-xy-my-branch-c7003101-preview  <- This is how a created preview looks by default
    ├── values.yaml                    <- e.g. image tag and route host are replaced in this one
    └── some-more-config-files-or-folders

.gitops.config.yaml¶

Make sure that your app repository contains a .gitops.config.yaml file. This file provides all information to

find repository, branch, and folder containing the template
templates for host and namespace name
replace values in template files (see deploy command for details on the key syntax)
find repository and branch where the preview should be created (i.e. your deployment config repository)
message templates used to comment your pull request

apiVersion: v2
applicationName: app-xy
# messages:                              # optional section
#   previewEnvCreated: "Created preview at revision ${GIT_HASH}. You can access it here: https://${PREVIEW_HOST}/some-fancy-path"    # optional (default: "New preview environment created for version `${GIT_HASH}`. Access it here: https://${PREVIEW_HOST}")
#   previewEnvUpdated: "Updated preview to revision ${GIT_HASH}. You can access it here: https://${PREVIEW_HOST}/some-fancy-path"    # optional (default: "Preview environment updated to version `${GIT_HASH}`. Access it here: https://${PREVIEW_HOST}")
#   previewEnvAlreadyUpToDate: "Your preview is already up-to-date with revision ${GIT_HASH}."                                       # optional (default: "The version `${GIT_HASH}` has already been deployed. Access it here: https://${PREVIEW_HOST}")
previewConfig:
  host: ${PREVIEW_NAMESPACE}.example.tld
# template:                              # optional section
#   organisation: templates              # optional (default: target.organisation)
#   repository: template-repo            # optional (default: target.repository)
#   branch: master                       # optional (default: target.branch)
#   path: custom/${APPLICATION_NAME}     # optional (default: '.preview-templates/${APPLICATION_NAME}')
  target:
    organisation: deployments
    repository: deployment-config-repo
#   branch: master                       # optional (defaults to repo's default branch)
#   namespace: ${APPLICATION_NAME}-${PREVIEW_ID_HASH}-preview'  # optional (default: '${APPLICATION_NAME}-${PREVIEW_ID}-${PREVIEW_ID_HASH_SHORT}-preview',
                                                                #           Invalid characters in PREVIEW_ID will be replaced. PREVIEW_ID will be
                                                                #           truncated if max namespace length exceeds `maxNamespaceLength` chars.)
#   maxNamespaceLength: 63               # optional (default: 53)
  replace:
    Chart.yaml:
      - path: name
        value: ${PREVIEW_NAMESPACE}
    values.yaml:
      - path: app.image
        value: registry.example.tld/my-app:${GIT_HASH}
      - path: route.host
        value: ${PREVIEW_HOST}

Info

If you currently use the old .gitops.config.yaml format (v0) you may find this online converter helpful to transition to the current apiVersion v2.

Warning

The old (v0) version and apiVersion v1 are marked deprecated and will be removed in gitopscli version 6.0.0.

Equivalent example:

# old 'v0' format
deploymentConfig:
  org: deployments
  repository: deployment-config-repo
  applicationName: app-xy
previewConfig:
  route:
    host:
      template: app-xy-{SHA256_8CHAR_BRANCH_HASH}.example.tld
  replace:
    - path: image.tag
      variable: GIT_COMMIT
    - path: route.host
      variable: ROUTE_HOST

# v2 format
apiVersion: v2
applicationName: app-xy
previewConfig:
  host: ${PREVIEW_NAMESPACE}.example.tld
  target:
    organisation: deployments
    repository: deployment-config-repo
    namespace: ${APPLICATION_NAME}-${PREVIEW_ID_HASH}-preview
  replace:
    Chart.yaml:
      - path: name
        value: ${PREVIEW_NAMESPACE}
    values.yaml:
      - path: image.tag
        value: ${GIT_HASH}
      - path: route.host
        value: ${PREVIEW_HOST}

Variables¶

APPLICATION_NAME: value from applicationName
GIT_HASH:
- create-preview: The CLI provided --git-hash
- create-pr-preview: The git hash of the app repository commit that will be deployed
PREVIEW_ID:
- create-preview: The CLI provided --preview-id
- create-pr-preview: The branch name in the app repository
PREVIEW_ID_HASH: The first 8 characters of the SHA256 hash of PREVIEW_ID
PREVIEW_ID_HASH_SHORT: The first 3 characters of the SHA256 hash of PREVIEW_ID
PREVIEW_NAMESPACE: The resulting value of previewConfig.target.namespace
PREVIEW_HOST: The resulting value of previewConfig.host

Returned Information¶

After running this command you'll find a YAML file at /tmp/gitopscli-preview-info.yaml. It contains generated information about your preview environment:

previewId: PREVIEW_ID
previewIdHash: 685912d3
routeHost: app.xy-685912d3.example.tld
namespace: my-app-685912d3-preview

Example¶

gitopscli create-preview \
  --git-provider-url https://bitbucket.baloise.dev \
  --username $GIT_USERNAME \
  --password $GIT_PASSWORD \
  --git-user "GitOps CLI" \
  --git-email "gitopscli@baloise.dev" \
  --organisation "my-team" \
  --repository-name "app-xy" \
  --git-hash "c0784a34e834117e1489973327ff4ff3c2582b94" \
  --preview-id "test-preview-id" \

Usage¶

usage: gitopscli create-preview [-h] --username USERNAME --password PASSWORD
                                [--git-user GIT_USER] [--git-email GIT_EMAIL]
                                [--git-author-name GIT_AUTHOR_NAME]
                                [--git-author-email GIT_AUTHOR_EMAIL]
                                --organisation ORGANISATION --repository-name
                                REPOSITORY_NAME [--git-provider GIT_PROVIDER]
                                [--git-provider-url GIT_PROVIDER_URL]
                                --git-hash GIT_HASH --preview-id PREVIEW_ID
                                [-v [VERBOSE]]

options:
  -h, --help            show this help message and exit
  --username USERNAME   Git username (alternative: GITOPSCLI_USERNAME env
                        variable)
  --password PASSWORD   Git password or token (alternative: GITOPSCLI_PASSWORD
                        env variable)
  --git-user GIT_USER   Git Username
  --git-email GIT_EMAIL
                        Git User Email
  --git-author-name GIT_AUTHOR_NAME
                        Git Author Name
  --git-author-email GIT_AUTHOR_EMAIL
                        Git Author Email
  --organisation ORGANISATION
                        Apps Git organisation/projectKey
  --repository-name REPOSITORY_NAME
                        Git repository name (not the URL, e.g. my-repo)
  --git-provider GIT_PROVIDER
                        Git server provider
  --git-provider-url GIT_PROVIDER_URL
                        Git provider base API URL (e.g.
                        https://bitbucket.example.tld)
  --git-hash GIT_HASH   the git hash which should be deployed
  --preview-id PREVIEW_ID
                        The user-defined preview ID
  -v [VERBOSE], --verbose [VERBOSE]
                        Verbose exception logging