Merge pull request #46123 from saschagrunert/mermaid-fix-2

Convert mermaid to svg for CRI blog post

Author: k8s-ci-robot

content/en/blog/_posts/2024-05-01-cri-streaming-explained/flow.mermaid

@@ -0,0 +1,29 @@
+sequenceDiagram
+ participant crictl
+ participant kubectl
+ participant API as API Server
+ participant kubelet
+ participant runtime as Container Runtime
+ participant streaming as Streaming Server
+ alt Client alternatives
+ Note over kubelet,runtime: Container Runtime Interface (CRI)
+ kubectl->>API: exec, attach, port-forward
+ API->>kubelet: exec, attach, port-forward
+ kubelet->>runtime: Exec, Attach, PortForward
+ else
+ Note over crictl,runtime: Container Runtime Interface (CRI)
+ crictl->>runtime: Exec, Attach, PortForward
+ end
+ runtime->>streaming: New Session
+ streaming->>runtime: HTTP endpoint (URL)
+ alt Client alternatives
+ runtime->>kubelet: Response URL
+ kubelet->>API: 
+ API-->>streaming: Connection upgrade (SPDY or WebSocket)
+ streaming-)API: Stream data
+ API-)kubectl: Stream data
+ else
+ runtime->>crictl: Response URL
+ crictl-->>streaming: Connection upgrade (SPDY or WebSocket)
+ streaming-)crictl: Stream data
+ end