Kubernetes-PlantUML

These are the PlantUML sprites, macros and stereotypes for creating PlantUML diagrams with the Kubernetes components. The official Kubernetes Icons Set (where this work is based) can be found here

This repo is heavily influenced by the awesome work from Ricardo Niepel on Azure-PlantUML

Table of Contents

• Kubernetes-PlantUML
  • Getting Started
  • Examples
  • Using kubernetes-PlantUML with other PlantUML files
  • List of Supported Symbols
  • Contributing
  • Reference

Getting Started

TL;DR - If you're familiar with PlantUML this is what you need:

' Kubernetes
!define KubernetesPuml https://raw.githubusercontent.com/dcasati/kubernetes-PlantUML/master/dist

' global definition
!includeurl KubernetesPuml/kubernetes_Common.puml
!includeurl KubernetesPuml/kubernetes_Context.puml
!includeurl KubernetesPuml/kubernetes_Simplified.puml

' k8s specific components
!includeurl KubernetesPuml/OSS/KubernetesPod.puml
!includeurl KubernetesPuml/OSS/KubernetesPsp.puml
!includeurl KubernetesPuml/OSS/KubernetesPv.puml
!includeurl KubernetesPuml/OSS/KubernetesPvc.puml

[...]

If you're starting with PlantUML, here's what you need:

1. VS Code with the PlantUML extension
2. Graphviz
3. Copy one of the examples from: https://github.com/dcasati/kubernetes-PlantUML/tree/master/samples

I also have an introduction to PlantUML here

Examples

A basic hello world example could look like this:

This picture was rendered with the following code:

@startuml kubernetes

footer Kubernetes Plant-UML
scale max 1024 width

skinparam nodesep 10
skinparam ranksep 10

' Kubernetes
!define KubernetesPuml https://raw.githubusercontent.com/dcasati/kubernetes-PlantUML/master/dist

!includeurl KubernetesPuml/kubernetes_Common.puml
!includeurl KubernetesPuml/kubernetes_Context.puml
!includeurl KubernetesPuml/kubernetes_Simplified.puml

!includeurl KubernetesPuml/OSS/KubernetesSvc.puml
!includeurl KubernetesPuml/OSS/KubernetesPod.puml

actor "User" as userAlias
left to right direction

' Kubernetes Components
Cluster_Boundary(cluster, "Kubernetes Cluster") {
    Namespace_Boundary(ns, "Web") {
        KubernetesSvc(svc, "service", "")
        KubernetesPod(pod1, "web-pod1", "")
        KubernetesPod(pod2, "web-pod2", "")
    }
}

Rel(userAlias,svc,"get HTTP/1.1 index.html", "1")
Rel(svc,pod1,"load Balances to Pods", "2")
Rel(svc,pod2,"load Balances to Pods", "2")
Rel_U(pod1, svc, "serves content", "3")
Rel(svc, userAlias, "return content to", "4")
@enduml

A more complete example would look like this picture:

and the accompaining code:

@startuml kubernetes

footer Kubernetes Plant-UML
scale max 1024 width

skinparam nodesep 10
skinparam ranksep 10

' Kubernetes
!define KubernetesPuml https://raw.githubusercontent.com/dcasati/kubernetes-PlantUML/master/dist

!includeurl KubernetesPuml/kubernetes_Common.puml
!includeurl KubernetesPuml/kubernetes_Context.puml
!includeurl KubernetesPuml/kubernetes_Simplified.puml

!includeurl KubernetesPuml/OSS/KubernetesSvc.puml
!includeurl KubernetesPuml/OSS/KubernetesIng.puml
!includeurl KubernetesPuml/OSS/KubernetesPod.puml
!includeurl KubernetesPuml/OSS/KubernetesRs.puml
!includeurl KubernetesPuml/OSS/KubernetesDeploy.puml
!includeurl KubernetesPuml/OSS/KubernetesHpa.puml

actor "User" as userAlias
left to right direction

' Kubernetes Components
Cluster_Boundary(cluster, "Kubernetes Cluster") {
    Namespace_Boundary(ns, "Back End") {
        KubernetesIng(ingress, "your.domain.com", "")
        KubernetesSvc(svc, "service", "")
        KubernetesPod(pod1, "pod1", "")
        KubernetesPod(pod2, "pod2", "")
        KubernetesPod(pod3, "pod3", "")

        KubernetesRs(rs,"","")
        KubernetesDeploy(deploy,"deployment","")
        KubernetesHpa(hpa, "HPA", "")
    }
}

Rel(userAlias,ingress," ")
Rel(ingress,svc," ")

Rel(svc,pod1," ")
Rel(svc,pod2," ")
Rel(svc,pod3," ")

Rel_U(rs,pod1," ")
Rel_U(rs,pod2," ")
Rel_U(rs,pod3," ")

Rel_U(deploy,rs, " ")
Rel_U(hpa,deploy, " ")

@enduml

Using kubernetes-PlantUML with other PlantUML files

You can certainly mix and match the stencils from kubernetes-PlantUML with other PlantUML files. For instance, here is an example of using it with the Azure-PlantUML files to ilustrate this reference architecture

The equivalent of that in PlantUML would look like this:

@startuml kubernetes

footer Kubernetes Plant-UML
scale max 1024 width

skinparam nodesep 10
skinparam ranksep 10

' Azure
!define AzurePuml https://raw.githubusercontent.com/RicardoNiepel/Azure-PlantUML/release/2-1/dist

!includeurl AzurePuml/AzureCommon.puml
!includeurl AzurePuml/AzureSimplified.puml

!includeurl AzurePuml/Containers/AzureContainerRegistry.puml
!includeurl AzurePuml/Databases/AzureCosmosDb.puml
!includeurl AzurePuml/Databases/AzureSqlDatabase.puml
!includeurl AzurePuml/DevOps/AzurePipelines.puml
!includeurl AzurePuml/Identity/AzureActiveDirectory.puml
!includeurl AzurePuml/Networking/AzureLoadBalancer.puml
!includeurl AzurePuml/Security/AzureKeyVault.puml

' Kubernetes
!define KubernetesPuml https://raw.githubusercontent.com/dcasati/kubernetes-PlantUML/master/dist

!includeurl KubernetesPuml/kubernetes_Common.puml
!includeurl KubernetesPuml/kubernetes_Context.puml
!includeurl KubernetesPuml/kubernetes_Simplified.puml

!includeurl KubernetesPuml/OSS/KubernetesApi.puml
!includeurl KubernetesPuml/OSS/KubernetesIng.puml
!includeurl KubernetesPuml/OSS/KubernetesPod.puml

actor "DevOps" as devopsAlias
collections "Client Apps" as clientalias
collections "Helm Charts" as helmalias

left to right direction

' Azure Components
AzureActiveDirectory(aad, "\nAzure\nActive Directory", "Global")
AzureContainerRegistry(acr, "ACR", "Canada Central")
AzureCosmosDb(cosmos, "\nCosmos DB", "Global")
AzureKeyVault(keyvault, "\nAzure\nKey Vault", "Global")
AzureLoadBalancer(alb, "\nLoad\nBalancer", "Canada Central")
AzureSqlDatabase(sql, "\nExternal\ndata stores", "Canada Central")
AzurePipelines(ado, "CI/CD\nAzure Pipelines", "Global")

' Kubernetes Components
Cluster_Boundary(cluster, "Kubernetes Cluster") {
    KubernetesApi(KubernetesApi, "Kubernetes API", "")

    Namespace_Boundary(nsFrontEnd, "Front End") {
        KubernetesIng(ingress, "API Gateway", "")
    }

    Namespace_Boundary(nsBackEnd, "Back End") {
        KubernetesPod(KubernetesBE1, "", "")
        KubernetesPod(KubernetesBE2, "", "")
        KubernetesPod(KubernetesBE3, "", "")
    }

    Namespace_Boundary(nsUtil, "Utiliy Services") {
        KubernetesPod(KubernetesUtil1, "", "")
        KubernetesPod(KubernetesUtil2, "","")
    }
}

Rel(devopsAlias, aad, "AUTH")
Rel(helmalias, KubernetesApi, "helm upgrade")

Rel(aad, keyvault, " ")
Rel(KubernetesApi, aad, "RBAC", "ASYNC")

Rel(clientalias, alb, "HTTP", "ASYNC")
Rel(alb, ingress, "HTTP", "ASYNC")

Rel(ingress, KubernetesBE1, " ")
Rel(KubernetesBE1, KubernetesBE2, " ")
Rel(KubernetesBE1, KubernetesBE3, " ")

Rel(KubernetesBE2, sql, " ")
Rel(KubernetesBE3, keyvault, "Pod Identity")
Rel(KubernetesBE3, cosmos, " ")

Rel(ado, acr, "docker push")
Rel_U(KubernetesApi, acr, "docker pull")
@enduml

List of Supported Symbols

Category	Macro (Name)	Mono	Url
OSS
OSS	KubernetesCronjob (Kubernetes Cronjob)		OSS/KubernetesCronjob.puml
OSS	KubernetesGroup (Kubernetes Group)		OSS/KubernetesGroup.puml
OSS	KubernetesPsp (Kubernetes Psp)		OSS/KubernetesPsp.puml
OSS	KubernetesRole (Kubernetes Role)		OSS/KubernetesRole.puml
OSS	KubernetesApi (Kubernetes Api)		OSS/KubernetesApi.puml
OSS	KubernetesJob (Kubernetes Job)		OSS/KubernetesJob.puml
OSS	KubernetesCm (Kubernetes Cm)		OSS/KubernetesCm.puml
OSS	KubernetesMaster (Kubernetes Master)		OSS/KubernetesMaster.puml
OSS	KubernetesKproxy (Kubernetes Kproxy)		OSS/KubernetesKproxy.puml
OSS	KubernetesCrd (Kubernetes Crd)		OSS/KubernetesCrd.puml
OSS	KubernetesDs (Kubernetes Ds)		OSS/KubernetesDs.puml
OSS	KubernetesSc (Kubernetes Sc)		OSS/KubernetesSc.puml
OSS	KubernetesCrb (Kubernetes Crb)		OSS/KubernetesCrb.puml
OSS	KubernetesSched (Kubernetes Sched)		OSS/KubernetesSched.puml
OSS	KubernetesLimits (Kubernetes Limits)		OSS/KubernetesLimits.puml
OSS	KubernetesQuota (Kubernetes Quota)		OSS/KubernetesQuota.puml
OSS	KubernetesVol (Kubernetes Vol)		OSS/KubernetesVol.puml
OSS	KubernetesSa (Kubernetes Sa)		OSS/KubernetesSa.puml
OSS	KubernetesKubelet (Kubernetes Kubelet)		OSS/KubernetesKubelet.puml
OSS	KubernetesPvc (Kubernetes Pvc)		OSS/KubernetesPvc.puml
OSS	KubernetesCcm (Kubernetes Ccm)		OSS/KubernetesCcm.puml
OSS	KubernetesSts (Kubernetes Sts)		OSS/KubernetesSts.puml
OSS	KubernetesNetpol (Kubernetes Netpol)		OSS/KubernetesNetpol.puml
OSS	KubernetesCrole (Kubernetes Crole)		OSS/KubernetesCrole.puml
OSS	KubernetesRs (Kubernetes Rs)		OSS/KubernetesRs.puml
OSS	KubernetesNode (Kubernetes Node)		OSS/KubernetesNode.puml
OSS	KubernetesSecret (Kubernetes Secret)		OSS/KubernetesSecret.puml
OSS	KubernetesNs (Kubernetes Ns)		OSS/KubernetesNs.puml
OSS	KubernetesDeploy (Kubernetes Deploy)		OSS/KubernetesDeploy.puml
OSS	KubernetesUser (Kubernetes User)		OSS/KubernetesUser.puml
OSS	KubernetesPv (Kubernetes Pv)		OSS/KubernetesPv.puml
OSS	KubernetesEp (Kubernetes Ep)		OSS/KubernetesEp.puml
OSS	KubernetesSvc (Kubernetes Svc)		OSS/KubernetesSvc.puml
OSS	KubernetesRb (Kubernetes Rb)		OSS/KubernetesRb.puml
OSS	KubernetesEtcd (Kubernetes Etcd)		OSS/KubernetesEtcd.puml
OSS	KubernetesIng (Kubernetes Ing)		OSS/KubernetesIng.puml
OSS	KubernetesHpa (Kubernetes Hpa)		OSS/KubernetesHpa.puml

Contributing

I've built this on a necessity that I have for making better diagrams when Kubernetes is part of the solution. This is based on a community effort and as such this should belong to the Kubernetes community. Feel free to fork and to submit PRs.

Reference

None of the work here would be possible without the foundation from Ricardo Niepel, PlantUML and the C4 Model

• Ricardo Niepel - Azure-PlantUML
• C4 Model - https://c4model.com