Convenient to use with
jq
# get https://graphviz.org/download/
$ go install github.com/nikolaydubina/jsonl-graph@latest
What is JSONL graph? Node has id. Edge has from and to.
{
"id": "github.com/gin-gonic/gin",
"can_get_github": true,
"github_url": "https://github.com/gin-gonic/gin",
"git_last_commit": "2021-04-21",
"git_num_contributors": 321,
...
}
...
{
"from": "github.com/gin-gonic/gin",
"to": "golang.org/x/tools",
...
}
Kubernetes Pod Owners
$ kubectl get pods -o json | jq '.items[] | {to: (.kind + ":" + .metadata.name), from: (.metadata.ownerReferences[].kind + ":" + .metadata.ownerReferences[].name)}' | jsonl-graph | dot -Tsvg > k8s_pod_owners.svg
Large nodes and color scheme
$ cat '
{"id":"github.com/gin-gonic/gin","can_get_git":true, ... }
{"id":"github.com/gin-contrib/sse","can_get_git":true,"can_run_tests":true ... }
...
{"from":"github.com/gin-gonic/gin","to":"golang.org/x/tools"}
{"from":"github.com/gin-gonic/gin","to":"github.com/go-playground/validator/v10"}
' | jsonl-graph -color-scheme=file://$PWD/testdata/colors.json | dot -Tsvg > colored.svg
Small nodes or only edges
$ cat '
{"from":"github.com/nikolaydubina/jsonl-graph/graph","to":"bufio"}
{"from":"github.com/nikolaydubina/jsonl-graph/graph","to":"bytes"}
{"from":"github.com/nikolaydubina/jsonl-graph/graph","to":"encoding/json"}
{"from":"github.com/nikolaydubina/jsonl-graph/graph","to":"errors"}
{"from":"github.com/nikolaydubina/jsonl-graph/graph","to":"fmt"}
...
' | jsonl-graph | dot -Tsvg > small.svg
All Kubernetes Pod Owners with details
# add edges
$ kubectl get pods -o json | jq '.items[] | {to: .metadata.name, from: .metadata.ownerReferences[].name}' > k8s_pod_owners_details.jsonl
# add node details
$ kubectl get rs -o json | jq '.items[] | .id += .metadata.name' >> k8s_pod_owners_details.jsonl
$ kubectl get pods -o json | jq '.items[] | .id += .metadata.name' >> k8s_pod_owners_details.jsonl
# flatten objects and render
$ cat k8s_pod_owners_details.jsonl | jq '. as $in | reduce leaf_paths as $path ({}; . + { ($path | map(tostring) | join(".")): $in | getpath($path) })' | jsonl-graph | dot -Tsvg > k8s_pod_owners.svg
Currently only Graphviz is supported. Follow progress of native Go graph rendering in github.com/nikolaydubina/go-graph-layout. Once it is ready, it will be integrated into this project.