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A CLI tool used to deploy ephemeral environments for testing cloud.redhat.com applications

Project description

bonfire

A CLI tool used to deploy ephemeral environments for testing cloud.redhat.com applications

bonfire interacts with a local configuration file or a running instance of qontract-server (the component that powers the AppSRE team's internal app-interface graphql API) to obtain applications' OpenShift templates, process them, and deploy them.

It also interacts with OpenShift to manage the reservation of ephemeral namespaces for testing.

It is meant to be partnered with the Clowder operator to spin up an ephemeral environment for testing on either a remote OpenShift cluster or a local k8s cluster.

Installation

We'd recommend setting up a virtual environment for bonfire:

VENV_DIR=~/bonfire_venv
mkdir -p $VENV_DIR
python3 -m venv $VENV_DIR
. $VENV_DIR/bin/activate
pip install crc-bonfire
bonfire --help

Overview

The bonfire process command can be used to print processed app configs to stdout.

The bonfire namespace reserve command can be used to acquire a namespace on a cluster if that cluster has been set up with bonfire's namespace reconciler.

The bonfire deploy command can be used as a helpful "1-liner" command to reserve a namespace, process application configs, apply them into a desired namespace, and wait for them to come up successfully.

The bonfire process-env command can be used to print a processed ClowdEnvironment config to stdout.

The bonfire deploy-env command can be used as a helpful "1-liner" command to apply a ClowdEnvironment configuration into a cluster and wait for environment resources to come up successfully.

Using a local config

To get up and running without needing to contact app-interface's qontract-server, you can utilize a local config file. bonfire ships with a default config that should be enough to get started for most internal Red Hat employees. An internal repository holds application configurations for the cloud.redhat.com platform that are valid for use in ephemeral environments.

By default, the configuration file will be stored in ~/.config/bonfire/config.yaml. You can reset the config to default at any time using bonfire config write-default.

You can edit this file to override any app configurations to allow for "local tinkering". If you define an app under the apps key of the config, it will take precedence over that app's configuration that was fetched using the appsFile

Loading an app's ephemeral config from app-interface

You can also run bonfire process/bonfire deploy using --source appsre which will pull configurations from app-interface.

You'll first need to set proper env variables to interface with your instance of qontract-server:

export QONTRACT_BASE_URL="https://myserver/graphql"
export QONTRACT_USERNAME=myUsername
export QONTRACT_PASSWORD=myPassword

If these env vars are not specified, bonfire will attempt to access a local qontract-server (see "Setting up a local qontract-server" below)

bonfire will query the qontract GraphQL API and read the desired application's deploy configuration.

You can edit the local configuration file (discussed above) if you wish to override any app configurations to allow for "local tinkering". If you define an app under the apps key of the config, it will take precedence over that app's configuration that was fetched from app-interface.

Loading application configs

bonfire process relies on a few key pieces of info to process app configs:

  1. The application name. This is typically the name of the listed in app.yaml in app-interface
  2. (applies to --source=appsre only) a 'target env' -- the name of the app-interface environment that you want to pull application configs for. An app's config will only be processed if it has a deploy target set up that points to a namespace mapped to this environment (default: "ephemeral")
  3. (optional) a 'ref env' -- the name of the app-interface environment that we want to use in order to set the applications IMAGE_TAG values and deploy template ref. This can be useful if you want to deploy applications using ephemeral template parameters, but you want to override the IMAGE_TAG/ref defined on all apps to use the values found in prod or stage.
  4. Any template refs you wish to override -- in other words, if you want to download a different git hash of an application component's template.
  5. Any image tags you wish to override -- in other words, if you want to use a different image tag for just a specific docker image.
  6. Any parameters you wish to override -- if you want to set a different template parameter for a specific app.

By default, bonfire will dynamically load dependencies that all components of app relies on. This requires the app to be using the Clowder operator and to have the dependencies section of the ClowdApp set up.

Example usage in a smoke test

The goal of a smoke test running against an app is to:

  • deploy the PR's code for app
  • deploy the production versions of app's dependencies alongside it

Below we'll show how bonfire deploy will enable this:

Let's say that we are running a PR check against the insights-puptoo service. This service:

  • is a member of the ingress application.
  • has a kubernetes deploy manifest that resides in the same repo as the code
  • has its CI/CD pr_check.sh set up such that if a PR is opened, a docker image is built and pushed to quay.io/myorg/insights-puptoo with the tag pr-<git hash>. The PR opened against the app has commit hash abc1234

If we intend to reserve a namespace and deploy the ingress application group into it, using the new template/image of the insights-puptoo PR, but using the production template/image for all other components, we could run:

APP_NAME=ingress
COMPONENT_NAME=insights-puptoo
GIT_COMMIT=pr-abc1234
IMAGE=quay.io/myorg/insights-puptoo
IMAGE_TAG=abc1234

NAMESPACE=$(bonfire deploy $APP_NAME \
    --ref-env insights-prod \
    --set-template-ref $COMPONENT_NAME=$GIT_COMMIT \
    --set-image-tag $IMAGE=$IMAGE_TAG)

echo "My environment is deployed into $NAMESPACE"

This is functionally equivalent to:

NAMESPACE=$(bonfire namespace reserve)

bonfire process $APP_NAME
    --ref-env insights-prod
    --set-template-ref $COMPONENT_NAME=$GIT_COMMIT
    --set-image-tag $IMAGE=$IMAGE_TAG
    --clowd-env env-$NAMESPACE

bonfire namespace wait-on-resources $NAMESPACE

echo "My environment is deployed into $NAMESPACE"

Namespace management

bonfire is also used to reserve, release, and reconcile ephemeral namespaces running on our test OpenShift clusters.

The list of ephemeral namespaces is stored in app-interface.

The service account that bonfire logs in to the cluster with has a custom role bound to it which allows it to edit namespace labels:

---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: namespace-editor
rules:
- apiGroups:
  - ""
  resources:
  - namespaces
  verbs:
  - get
  - list
  - patch
  - update
  - watch

This role is bound to the service account in each ephemeral namespace.

Bonfire uses labels to keep track of which namespaces are reserved AND ready. A "ready" namespace is one which has been "wiped clean" and then had a fresh set of base test configurations copied into it.

When a tester is logged in using the proper account, namespace commands can be used such as:

bonfire namespace reserve -- find an available namespace and reserve it. By default the TTL is 1 hr.

bonfire namespace release <namespace> -- release a namespace reservation

Use bonfire namespace -h to see a list of all available namespace commands.

Namespace reconciler

A separate cron job runs the bonfire namespace reconcile command every 2 minutes. This command does the following:

  • Checks for any namespaces that are released, but not ready, and "prepares" them by wiping them and copying base test resources into them. After being prepared, the namespace is marked "ready". A namespace is prepared by:
    1. creating an ephemeral ClowdEnvironment resource for it, and
    2. copying any secrets defined in the ephemeral-base namespace into it
  • Checks for any namespaces that are reserved, but do not have an "expires" time set on them yet. This would be a newly-reserved namespace. The reconciler is responsible for applying the "expires time"
  • Checks the "expires time" on all reserved namespaces. If any have expired, bonfire will release them and re-prepare them.

Interactions with Clowder

  • For every namespace that bonfire prepares, it creates a Clowder ClowdEnvironment resource following this template. The name of the environment matches this format. So, if bonfire prepared a namespace called ephemeral-01, then the name of the ClowdEnvironment would be env-ephemeral-01.

  • When bonfire deploy is executed for a namespace, it will attempt to find the ClowdEnvironment associated with that namespace and set the ENV_NAME parameter accordingly for all templates it processes. All templates that define a ClowdApp resource should set the environment mapping in their spec using an ${ENV_NAME} parameter.

  • When bonfire namespace wait-on-resources is executed, it follows this logic:

  1. Wait for all resources owned by a 'ClowdEnvironment' to appear in the namespace
  2. Wait for all the deployments in the namespace to reach 'active' state.
  3. Wait for resources owned by a 'ClowdApp' to appear in the namespace
  4. Wait for all the deployments in the namespace to reach 'active' state (deployments we already waited on in step 2 are not waited on again)

Miscellaneous

Running a local qontract-server

For testing/debug purposes, instead of committing changes directly to app-interface, you can run your own local copy of the app-interface API server.

  1. Clone https://github.com/app-sre/qontract-server
  2. Clone the internal app-interface repo

In qontract-server, run:

npm install yarn
yarn install
yarn build
make bundle APP_INTERFACE_PATH=/path/to/app-interface
LOAD_METHOD=fs DATAFILES_FILE=bundle/bundle.json yarn run server

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