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author | GitLab Bot <gitlab-bot@gitlab.com> | 2020-07-10 00:09:33 +0300 |
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committer | GitLab Bot <gitlab-bot@gitlab.com> | 2020-07-10 00:09:33 +0300 |
commit | 4f288fdc9299a1951232a05593fcfd942c11b61f (patch) | |
tree | cb7890c27296e605f5beb64c10ef38e824702559 /doc/user/project/operations | |
parent | f67f18d9492786e635e942beefa63d41f4c35765 (diff) |
Add latest changes from gitlab-org/gitlab@master
Diffstat (limited to 'doc/user/project/operations')
-rw-r--r-- | doc/user/project/operations/feature_flags.md | 288 | ||||
-rw-r--r-- | doc/user/project/operations/index.md | 16 |
2 files changed, 6 insertions, 298 deletions
diff --git a/doc/user/project/operations/feature_flags.md b/doc/user/project/operations/feature_flags.md index aac3ce19841..b0f7cfc966a 100644 --- a/doc/user/project/operations/feature_flags.md +++ b/doc/user/project/operations/feature_flags.md @@ -1,289 +1,5 @@ --- -stage: Release -group: Progressive Delivery -info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers +redirect_to: '../../../operations/feature_flags.md' --- -# Feature Flags **(PREMIUM)** - -> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/7433) in GitLab 11.4. - -With Feature Flags, you can deploy your application's new features to production in smaller batches. -You can toggle a feature on and off to subsets of users, helping you achieve Continuous Delivery. -Feature flags help reduce risk, allowing you to do controlled testing, and separate feature -delivery from customer launch. - -<i class="fa fa-youtube-play youtube" aria-hidden="true"></i> -For an example of feature flags in action, see [GitLab for Deploys, Feature Flags, and Error Tracking](https://www.youtube.com/embed/5tw2p6lwXxo). - -## How it works - -GitLab uses [Unleash](https://github.com/Unleash/unleash), a feature -toggle service. - -By enabling or disabling a flag in GitLab, your application -can determine which features to enable or disable. - -You can create feature flags in GitLab and use the API from your application -to get the list of feature flags and their statuses. The application must be configured to communicate -with GitLab, so it's up to developers to use a compatible client library and -[integrate the feature flags in your app](#integrate-feature-flags-with-your-application). - -## Create a feature flag - -To create and enable a feature flag: - -1. Navigate to your project's **Operations > Feature Flags**. -1. Click the **New feature flag** button. -1. Enter a name that starts with a letter and contains only lowercase letters, digits, underscores (`_`), - or dashes (`-`), and does not end with a dash (`-`) or underscore (`_`). -1. Enter a description (optional, 255 characters max). -1. Enter details about how the flag should be applied: - - In GitLab 13.0 and earlier, add **Environment specs**. For each environment, - include the **Status** (default enabled) and [**Rollout strategy**](#rollout-strategy-legacy) - (defaults to **All users**). - - In GitLab 13.1 and later, add Feature Flag [**Strategies**](#feature-flag-strategies). - For each strategy, include the **Type** (defaults to [**All users**](#all-users)) - and **Environments** (defaults to all environments). -1. Click **Create feature flag**. - -You can change these settings by clicking the **{pencil}** (edit) button -next to any feature flag in the list. - -## Rollout strategy (legacy) - -> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/8240) in GitLab 12.2. - -In GitLab 13.0 and earlier, the **Rollout strategy** setting affects which users will experience -the feature as enabled. Choose the percentage of users that the feature will be enabled -for. The rollout strategy will have no effect if the environment spec is disabled. - -It can be set to: - -- All users -- [Percent rollout (logged in users)](#percent-rollout-logged-in-users) - - Optionally, you can click the **Include additional user IDs** checkbox and add a list - of specific users IDs to enable the feature for. -- [User IDs](#user-ids) - -## Feature flag strategies - -> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/35555) in GitLab 13.0. -> - It's deployed behind a feature flag, disabled by default. -> - It's enabled on GitLab.com. -> - To use it in GitLab self-managed instances, ask a GitLab administrator to [enable it](#enable-or-disable-feature-flag-strategies). **(CORE ONLY)** - -You can apply a feature flag strategy across multiple environments, without defining -the strategy multiple times. - -GitLab Feature Flags use [Unleash](https://unleash.github.io) as the feature flag -engine. In Unleash, there are [strategies](https://unleash.github.io/docs/activation_strategy) -for granular feature flag controls. GitLab Feature Flags can have multiple strategies, -and the supported strategies are: - -- [All users](#all-users) -- [Percent rollout (logged in users)](#percent-rollout-logged-in-users) -- [User IDs](#user-ids) -- [List](#list) - -Strategies can be added to feature flags when [creating a feature flag](#create-a-feature-flag), -or by editing an existing feature flag after creation by navigating to **Operations > Feature Flags** -and clicking **{pencil}** (edit). - -### All users - -Enables the feature for all users. It uses the [`default`](https://unleash.github.io/docs/activation_strategy#default) -Unleash activation strategy. - -### Percent rollout (logged in users) - -Enables the feature for a percentage of authenticated users. It uses the -[`gradualRolloutUserId`](https://unleash.github.io/docs/activation_strategy#gradualrolloutuserid) -Unleash activation strategy. - -For example, set a value of 15% to enable the feature for 15% of authenticated users. - -The rollout percentage can be from 0% to 100%. - -CAUTION: **Caution:** -If this strategy is selected, then the Unleash client **must** be given a user -ID for the feature to be enabled. See the [Ruby example](#ruby-application-example) below. - -### User IDs - -> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/8240) in GitLab 12.2. [Updated](https://gitlab.com/gitlab-org/gitlab/-/issues/34363) to be defined per environment in GitLab 12.6. - -Enables the feature for a list of target users. It is implemented -using the Unleash [`userWithId`](https://unleash.github.io/docs/activation_strategy#userwithid) -activation strategy. - -Enter user IDs as a comma-separated list of values. For example, -`user@example.com, user2@example.com`, or `username1,username2,username3`, and so on. - -CAUTION: **Caution:** -The Unleash client **must** be given a user ID for the feature to be enabled for -target users. See the [Ruby example](#ruby-application-example) below. - -### List - -> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/35930) in GitLab 13.1. - -Enables the feature for lists of users created with the [Feature Flag User List API](../../../api/feature_flag_user_lists.md). -Similar to [User IDs](#user-ids), it uses the Unleash [`userWithId`](https://unleash.github.io/docs/activation_strategy#userwithid) -activation strategy. - -### Enable or disable feature flag strategies - -This feature is under development, but is ready for testing. It's -deployed behind a feature flag that is **disabled by default**. -[GitLab administrators with access to the GitLab Rails console](../../../administration/feature_flags.md) -can enable it for your instance. - -To enable it: - -```ruby -Feature.enable(:feature_flags_new_version) -``` - -To disable it: - -```ruby -Feature.disable(:feature_flags_new_version) -``` - -## Disable a feature flag for a specific environment - -In [GitLab 13.0 and earlier](https://gitlab.com/gitlab-org/gitlab/-/issues/8621), -to disable a feature flag for a specific environment: - -1. Navigate to your project's **Operations > Feature Flags**. -1. For the feature flag you want to disable, click the Pencil icon. -1. To disable the flag: - - In GitLab 13.0 and earlier: Slide the Status toggle for the environment. Or, to delete the - environment spec, on the right, click the **Remove (X)** icon. - - In GitLab 13.1 and later: For each strategy it applies to, under **Environments**, delete the environment. - -1. Click **Save changes**. - -## Disable a feature flag for all environments - -To disable a feature flag for all environments: - -1. Navigate to your project's **Operations > Feature Flags**. -1. For the feature flag you want to disable, slide the Status toggle to **Disabled**. - -The feature flag is displayed on the **Disabled** tab. - -## Integrate feature flags with your application - -To use feature flags with your application, get access credentials from GitLab. -Then prepare your application with a client library. - -### Get access credentials - -To get the access credentials that your application needs to communicate with GitLab: - -1. Navigate to your project's **Operations > Feature Flags**. -1. Click the **Configure** button to view the following: - - **API URL**: URL where the client (application) connects to get a list of feature flags. - - **Instance ID**: Unique token that authorizes the retrieval of the feature flags. - - **Application name**: The name of the running environment. For instance, - if the application runs for a production server, the application name would be - `production` or similar. This value is used for the environment spec evaluation. - -NOTE: **Note:** -The meaning of these fields might change over time. For example, we are not sure -if **Instance ID** will be single token or multiple tokens, assigned to the -**Environment**. Also, **Application name** could describe the version of -application instead of the running environment. - -### Choose a client library - -GitLab implements a single backend that is compatible with Unleash clients. - -With the Unleash client, developers can define, in the application code, the default values for flags. -Each feature flag evaluation can express the desired outcome if the flag isn't present in the -provided configuration file. - -Unleash currently [offers many SDKs for various languages and frameworks](https://github.com/Unleash/unleash#client-implementations). - -### Feature flags API information - -For API content, see: - -- [Feature Flags API](../../../api/feature_flags.md) -- [Feature Flag Specs API](../../../api/feature_flag_specs.md) (Deprecated and [scheduled for removal in GitLab 14.0](https://gitlab.com/gitlab-org/gitlab/-/issues/213369).) -- [Feature Flag User Lists API](../../../api/feature_flag_user_lists.md) -- [Legacy Feature Flags API](../../../api/feature_flags_legacy.md) - -### Golang application example - -Here's an example of how to integrate feature flags in a Golang application: - -```golang -package main - -import ( - "io" - "log" - "net/http" - - "github.com/Unleash/unleash-client-go" -) - -type metricsInterface struct { -} - -func init() { - unleash.Initialize( - unleash.WithUrl("https://gitlab.com/api/v4/feature_flags/unleash/42"), - unleash.WithInstanceId("29QmjsW6KngPR5JNPMWx"), - unleash.WithAppName("production"), - unleash.WithListener(&metricsInterface{}), - ) -} - -func helloServer(w http.ResponseWriter, req *http.Request) { - if unleash.IsEnabled("my_feature_name") { - io.WriteString(w, "Feature enabled\n") - } else { - io.WriteString(w, "hello, world!\n") - } -} - -func main() { - http.HandleFunc("/", helloServer) - log.Fatal(http.ListenAndServe(":8080", nil)) -} -``` - -### Ruby application example - -Here's an example of how to integrate feature flags in a Ruby application. - -The Unleash client is given a user ID for use with a **Percent rollout (logged in users)** rollout strategy or a list of **Target Users**. - -```ruby -#!/usr/bin/env ruby - -require 'unleash' -require 'unleash/context' - -unleash = Unleash::Client.new({ - url: 'http://gitlab.com/api/v4/feature_flags/unleash/42', - app_name: 'production', - instance_id: '29QmjsW6KngPR5JNPMWx' -}) - -unleash_context = Unleash::Context.new -# Replace "123" with the id of an authenticated user. -# Note that the context's user id must be a string: -# https://unleash.github.io/docs/unleash_context -unleash_context.user_id = "123" - -if unleash.is_enabled?("my_feature_name", unleash_context) - puts "Feature enabled" -else - puts "hello, world!" -end -``` +This document was moved to [another location](../../../operations/feature_flags.md). diff --git a/doc/user/project/operations/index.md b/doc/user/project/operations/index.md index ca38eab9455..9cec578bc5e 100644 --- a/doc/user/project/operations/index.md +++ b/doc/user/project/operations/index.md @@ -1,13 +1,5 @@ -# Project operations +--- +redirect_to: '../../../operations/index.md' +--- -GitLab provides a variety of tools to help operate and maintain -your applications: - -- Collect [Prometheus metrics](../integrations/prometheus_library/index.md). -- Deploy to different [environments](../../../ci/environments/index.md). -- Connect your project to a [Kubernetes cluster](../clusters/index.md). -- Manage your infrastructure with [Infrastructure as Code](../../infrastructure/index.md) approaches. -- Discover and view errors generated by your applications with [Error Tracking](error_tracking.md). -- Create, toggle, and remove [Feature Flags](feature_flags.md). **(PREMIUM)** -- [Trace](tracing.md) the performance and health of a deployed application. **(ULTIMATE)** -- Change the [settings of the Monitoring Dashboard](dashboard_settings.md). +This document was moved to [another location](../../../operations/index.md). |