176 lines
4.9 KiB
Markdown
176 lines
4.9 KiB
Markdown
---
|
|
stage: Create
|
|
group: Ecosystem
|
|
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/#assignments
|
|
---
|
|
|
|
# Kroki diagrams **(FREE SELF)**
|
|
|
|
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/241744) in GitLab 13.7.
|
|
|
|
When [Kroki](https://kroki.io) integration is enabled and configured in
|
|
GitLab you can use it to create diagrams in AsciiDoc and Markdown documents.
|
|
|
|
## Kroki Server
|
|
|
|
When Kroki is enabled, GitLab sends diagrams to an instance of Kroki to display them as images.
|
|
You can use the free public cloud instance `https://kroki.io` or you can [install Kroki](https://docs.kroki.io/kroki/setup/install/)
|
|
on your own infrastructure.
|
|
After you've installed Kroki, make sure to update the server URL to point to your instance.
|
|
|
|
### Docker
|
|
|
|
With Docker, run a container like this:
|
|
|
|
```shell
|
|
docker run -d --name kroki -p 8080:8000 yuzutech/kroki
|
|
```
|
|
|
|
The **Kroki URL** is the hostname of the server running the container.
|
|
|
|
The [`yuzutech/kroki`](https://hub.docker.com/r/yuzutech/kroki) image contains the following diagrams libraries out-of-the-box:
|
|
|
|
<!-- vale gitlab.Spelling = NO -->
|
|
|
|
- [Bytefield](https://bytefield-svg.deepsymmetry.org/)
|
|
- [Ditaa](http://ditaa.sourceforge.net)
|
|
- [Erd](https://github.com/BurntSushi/erd)
|
|
- [GraphViz](https://www.graphviz.org/)
|
|
- [Nomnoml](https://github.com/skanaar/nomnoml)
|
|
- [PlantUML](https://github.com/plantuml/plantuml)
|
|
- [C4 model](https://github.com/RicardoNiepel/C4-PlantUML) (with PlantUML)
|
|
- [Svgbob](https://github.com/ivanceras/svgbob)
|
|
- [UMlet](https://github.com/umlet/umlet)
|
|
- [Vega](https://github.com/vega/vega)
|
|
- [Vega-Lite](https://github.com/vega/vega-lite)
|
|
- [WaveDrom](https://wavedrom.com/)
|
|
|
|
<!-- vale gitlab.Spelling = YES -->
|
|
|
|
If you want to use additional diagram libraries,
|
|
read the [Kroki installation](https://docs.kroki.io/kroki/setup/install/#_images) to learn how to start Kroki companion containers.
|
|
|
|
## Enable Kroki in GitLab
|
|
|
|
You need to enable Kroki integration from Settings under Admin Area.
|
|
To do that, log in with an administrator account and follow these steps:
|
|
|
|
1. Select the Admin Area (**{admin}**) icon.
|
|
1. Navigate to **Settings > General**.
|
|
1. Expand the **Kroki** section.
|
|
1. Select **Enable Kroki** checkbox.
|
|
1. Enter the **Kroki URL**.
|
|
|
|
## Create diagrams
|
|
|
|
With Kroki integration enabled and configured, you can start adding diagrams to
|
|
your AsciiDoc or Markdown documentation using delimited blocks:
|
|
|
|
- **Markdown**
|
|
|
|
````markdown
|
|
```plantuml
|
|
Bob -> Alice : hello
|
|
Alice -> Bob : hi
|
|
```
|
|
````
|
|
|
|
- **AsciiDoc**
|
|
|
|
```plaintext
|
|
[plantuml]
|
|
....
|
|
Bob->Alice : hello
|
|
Alice -> Bob : hi
|
|
....
|
|
```
|
|
|
|
The above blocks are converted to an HTML image tag with source pointing to the
|
|
Kroki instance. If the Kroki server is correctly configured, this should
|
|
render a nice diagram instead of the block:
|
|
|
|
|
|
|
|
Kroki supports more than a dozen diagram libraries. Here's a few examples:
|
|
|
|
**GraphViz**
|
|
|
|
```plaintext
|
|
[graphviz]
|
|
....
|
|
digraph finite_state_machine {
|
|
rankdir=LR;
|
|
node [shape = doublecircle]; LR_0 LR_3 LR_4 LR_8;
|
|
node [shape = circle];
|
|
LR_0 -> LR_2 [ label = "SS(B)" ];
|
|
LR_0 -> LR_1 [ label = "SS(S)" ];
|
|
LR_1 -> LR_3 [ label = "S($end)" ];
|
|
LR_2 -> LR_6 [ label = "SS(b)" ];
|
|
LR_2 -> LR_5 [ label = "SS(a)" ];
|
|
LR_2 -> LR_4 [ label = "S(A)" ];
|
|
LR_5 -> LR_7 [ label = "S(b)" ];
|
|
LR_5 -> LR_5 [ label = "S(a)" ];
|
|
LR_6 -> LR_6 [ label = "S(b)" ];
|
|
LR_6 -> LR_5 [ label = "S(a)" ];
|
|
LR_7 -> LR_8 [ label = "S(b)" ];
|
|
LR_7 -> LR_5 [ label = "S(a)" ];
|
|
LR_8 -> LR_6 [ label = "S(b)" ];
|
|
LR_8 -> LR_5 [ label = "S(a)" ];
|
|
}
|
|
....
|
|
```
|
|
|
|
|
|
|
|
**C4 (based on PlantUML)**
|
|
|
|
```plaintext
|
|
[c4plantuml]
|
|
....
|
|
@startuml
|
|
!include C4_Context.puml
|
|
|
|
title System Context diagram for Internet Banking System
|
|
|
|
Person(customer, "Banking Customer", "A customer of the bank, with personal bank accounts.")
|
|
System(banking_system, "Internet Banking System", "Allows customers to check their accounts.")
|
|
|
|
System_Ext(mail_system, "E-mail system", "The internal Microsoft Exchange e-mail system.")
|
|
System_Ext(mainframe, "Mainframe Banking System", "Stores all of the core banking information.")
|
|
|
|
Rel(customer, banking_system, "Uses")
|
|
Rel_Back(customer, mail_system, "Sends e-mails to")
|
|
Rel_Neighbor(banking_system, mail_system, "Sends e-mails", "SMTP")
|
|
Rel(banking_system, mainframe, "Uses")
|
|
@enduml
|
|
....
|
|
```
|
|
|
|
|
|
|
|
<!-- vale gitlab.Spelling = NO -->
|
|
|
|
**Nomnoml**
|
|
|
|
<!-- vale gitlab.Spelling = YES -->
|
|
|
|
```plaintext
|
|
[nomnoml]
|
|
....
|
|
[Pirate|eyeCount: Int|raid();pillage()|
|
|
[beard]--[parrot]
|
|
[beard]-:>[foul mouth]
|
|
]
|
|
|
|
[<abstract>Marauder]<:--[Pirate]
|
|
[Pirate]- 0..7[mischief]
|
|
[jollyness]->[Pirate]
|
|
[jollyness]->[rum]
|
|
[jollyness]->[singing]
|
|
[Pirate]-> *[rum|tastiness: Int|swig()]
|
|
[Pirate]->[singing]
|
|
[singing]<->[rum]
|
|
....
|
|
```
|
|
|
|
|