fails

[yashbhutwala]

kubectl graph all -o cypher | cypher-shell -u neo4j -p secret

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x1da90d8]

goroutine 1 [running]:
k8s.io/api/core/v1.(*ObjectReference).GroupVersionKind(...)
        /home/runner/go/pkg/mod/k8s.io/[email protected]/core/v1/objectreference.go:30
github.com/steveteuber/kubectl-graph/pkg/graph.(*CoreV1Graph).Endpoints(0xc00064c0f8, 0xc0000e0640, 0xc0000a8010, 0xc000450414, 0xa)
        /home/runner/work/kubectl-graph/kubectl-graph/pkg/graph/core.go:160 +0x278
github.com/steveteuber/kubectl-graph/pkg/graph.(*CoreV1Graph).ServiceTypeClusterIP(0xc00064c0f8, 0xc0002d6900, 0x2126000, 0x1, 0xc0002d6900)
        /home/runner/work/kubectl-graph/kubectl-graph/pkg/graph/core.go:199 +0x1f0
github.com/steveteuber/kubectl-graph/pkg/graph.(*CoreV1Graph).Service(0xc00064c0f8, 0xc0002d6900, 0xc0002d6900, 0x0, 0x0)
        /home/runner/work/kubectl-graph/kubectl-graph/pkg/graph/core.go:178 +0x7d
github.com/steveteuber/kubectl-graph/pkg/graph.(*CoreV1Graph).Unstructured(0xc00064c0f8, 0xc0005d6018, 0x1, 0x1)
        /home/runner/work/kubectl-graph/kubectl-graph/pkg/graph/core.go:64 +0x275
github.com/steveteuber/kubectl-graph/pkg/graph.(*Graph).Unstructured(0xc000721830, 0xc0005d6018, 0x3783308, 0xc00036c0a0)
        /home/runner/work/kubectl-graph/kubectl-graph/pkg/graph/graph.go:200 +0x152
github.com/steveteuber/kubectl-graph/pkg/graph.NewGraph(0xc0000d8420, 0xc00064c0f0, 0x1, 0x1, 0x0, 0x0, 0x0)
        /home/runner/work/kubectl-graph/kubectl-graph/pkg/graph/graph.go:185 +0x157
github.com/steveteuber/kubectl-graph/pkg/cmd.(*GraphOptions).Run(0xc00031a8f0, 0x23d2ae0, 0xc0004bd6b0, 0xc0000e2dc0, 0xc0004bd8c0, 0x1, 0x3, 0x0, 0x0)
        /home/runner/work/kubectl-graph/kubectl-graph/pkg/cmd/cmd.go:164 +0x2cc
github.com/steveteuber/kubectl-graph/pkg/cmd.NewCmdGraph.func1(0xc0000e2dc0, 0xc0004bd8c0, 0x1, 0x3)
        /home/runner/work/kubectl-graph/kubectl-graph/pkg/cmd/cmd.go:80 +0x159
github.com/spf13/cobra.(*Command).execute(0xc0000e2dc0, 0xc0000a6050, 0x3, 0x3, 0xc0000e2dc0, 0xc0000a6050)
        /home/runner/go/pkg/mod/github.com/spf13/[email protected]/command.go:846 +0x2c2
github.com/spf13/cobra.(*Command).ExecuteC(0xc0000e2dc0, 0x7, 0xc000142580, 0x238bce0)
        /home/runner/go/pkg/mod/github.com/spf13/[email protected]/command.go:950 +0x375
github.com/spf13/cobra.(*Command).Execute(...)
        /home/runner/go/pkg/mod/github.com/spf13/[email protected]/command.go:887
main.main()
        /home/runner/work/kubectl-graph/kubectl-graph/cmd/kubectl-graph/main.go:15 +0xda
Unable to connect to localhost:7687, ensure the database is running and that there is a working network connection to it.

Can you please add documentation if there is additional steps for running this plugin?

[steveteuber]

Hey @yashbhutwala,

Thank you for opening this issue. It seems like you have created a Service without a selector and added an Endpoint object manually. I have not tested that particular use case, but I will take a look into it and yes the documentation needs to be improved!

[steveteuber]

Hey @yashbhutwala,

I have updated the documentation with a usage example.
Tomorrow i'll fix the panic: runtime error: invalid memory address or nil pointer dereference.

[steveteuber]

I think this issue should be fixed now. Please upgrade the plugin to a newer version:

$ kubectl krew upgrade graph
Updated the local copy of plugin index.
  Upgrades available for installed plugins:
    * graph v0.1.0 -> v0.1.1
Upgrading plugin: graph
Upgraded plugin: graph

[steveteuber]

@yashbhutwala?

[yashbhutwala]

failure no longer happens, but the docs are still not clear to me to make use of this tool. I spun up the neo4j container and I ran kubectl graph all -n kube-system -o cypher | cypher-shell.. now what? I don't see a graph in the neo4j ui...

I do see data when I don't pipe it to cypher-shell

// create nodes
:begin
MERGE (node:Cluster {UID: "cluster_127.0.0.1"}) ON CREATE SET node.Name = "127.0.0.1";
MERGE (node:Namespace {UID: "namespace_kube-system"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Name = "kube-system";
MERGE (node:Endpoints {UID: "0ec3f2ac-a94d-48f3-b228-a1afe028b6a6"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-dns";
MERGE (node:Pod {UID: "11bfbae5-eeef-4da1-b825-ebb2a946e54b"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-scheduler-kind-control-plane";
MERGE (node:Container {UID: "2bb1b09b-967c-115e-157f-195b0c65d612"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kindnet-cni";
MERGE (node:Container {UID: "3d436918-a4dd-a347-a59e-4a51440fa421"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "coredns";
MERGE (node:Pod {UID: "4458d1a1-4914-4f8e-9100-a6eae77d34f4"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "coredns-5d4dd4b4db-vdfjn";
MERGE (node:Pod {UID: "4df6a9ef-fffa-4ec1-965d-cfc7117d79be"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "etcd-kind-control-plane";
MERGE (node:Pod {UID: "5728b70d-b9d5-4c93-b8c7-3ca5389a9d4f"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "coredns-5d4dd4b4db-n57hm";
MERGE (node:Deployment {UID: "5844277c-d6ab-4e2f-b268-ef4500e22755"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "coredns";
MERGE (node:DaemonSet {UID: "5d02bba5-69c3-42f2-af32-c8de05d9676a"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kindnet";
MERGE (node:Container {UID: "5f67823b-6d92-caf9-2ffe-418ad7031971"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-scheduler";
MERGE (node:Pod {UID: "6d4a5bc6-d053-4a7f-bcdd-4277c7a9a89f"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-apiserver-kind-control-plane";
MERGE (node:Container {UID: "6ff73eeb-71a7-11e5-c790-5e6991e35a4e"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-proxy";
MERGE (node:Container {UID: "7d807607-03ed-b50e-da60-3d122d456334"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-apiserver";
MERGE (node:Container {UID: "7d9c5b9f-161a-74a1-9e78-15d503f221ab"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "etcd";
MERGE (node:Pod {UID: "883d0094-4d70-44e5-9bc1-c029be48d1c1"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-proxy-mt4gh";
MERGE (node:DaemonSet {UID: "89f096b0-2d51-4fde-87d3-5c45bcd48cac"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-proxy";
MERGE (node:Pod {UID: "8b44f716-80db-4f26-a531-e914a8cfd1d5"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-controller-manager-kind-control-plane";
MERGE (node:Container {UID: "91aa60ce-e2a2-0d4e-ca6f-8faa2605e3d3"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "coredns";
MERGE (node:Container {UID: "bc63ed66-931a-d006-21bf-67c4ca5e9fb9"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-controller-manager";
MERGE (node:Service {UID: "d357fc06-76c6-4033-9f97-62344224890a"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kube-dns";
MERGE (node:Pod {UID: "e57a1308-424c-470c-a1f0-30be62431043"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "kindnet-dszss";
MERGE (node:ReplicaSet {UID: "f18e0947-02a1-4a7d-801f-4d8623f0f078"}) ON CREATE SET node.ClusterName = "127.0.0.1", node.Namespace = "kube-system", node.Name = "coredns-5d4dd4b4db";
:commit

// wait for index completion
call db.awaitIndexes();

// create relationships
:begin
MATCH (from:Endpoints),(to:Pod) WHERE from.UID = "0ec3f2ac-a94d-48f3-b228-a1afe028b6a6" AND to.UID = "4458d1a1-4914-4f8e-9100-a6eae77d34f4" MERGE (from)-[:Pod]->(to);
MATCH (from:Endpoints),(to:Pod) WHERE from.UID = "0ec3f2ac-a94d-48f3-b228-a1afe028b6a6" AND to.UID = "5728b70d-b9d5-4c93-b8c7-3ca5389a9d4f" MERGE (from)-[:Pod]->(to);
MATCH (from:Pod),(to:Container) WHERE from.UID = "11bfbae5-eeef-4da1-b825-ebb2a946e54b" AND to.UID = "5f67823b-6d92-caf9-2ffe-418ad7031971" MERGE (from)-[:Container]->(to);
MATCH (from:Pod),(to:Container) WHERE from.UID = "4458d1a1-4914-4f8e-9100-a6eae77d34f4" AND to.UID = "3d436918-a4dd-a347-a59e-4a51440fa421" MERGE (from)-[:Container]->(to);
MATCH (from:Pod),(to:Container) WHERE from.UID = "4df6a9ef-fffa-4ec1-965d-cfc7117d79be" AND to.UID = "7d9c5b9f-161a-74a1-9e78-15d503f221ab" MERGE (from)-[:Container]->(to);
MATCH (from:Pod),(to:Container) WHERE from.UID = "5728b70d-b9d5-4c93-b8c7-3ca5389a9d4f" AND to.UID = "91aa60ce-e2a2-0d4e-ca6f-8faa2605e3d3" MERGE (from)-[:Container]->(to);
MATCH (from:Deployment),(to:ReplicaSet) WHERE from.UID = "5844277c-d6ab-4e2f-b268-ef4500e22755" AND to.UID = "f18e0947-02a1-4a7d-801f-4d8623f0f078" MERGE (from)-[:ReplicaSet]->(to);
MATCH (from:DaemonSet),(to:Pod) WHERE from.UID = "5d02bba5-69c3-42f2-af32-c8de05d9676a" AND to.UID = "e57a1308-424c-470c-a1f0-30be62431043" MERGE (from)-[:Pod]->(to);
MATCH (from:Pod),(to:Container) WHERE from.UID = "6d4a5bc6-d053-4a7f-bcdd-4277c7a9a89f" AND to.UID = "7d807607-03ed-b50e-da60-3d122d456334" MERGE (from)-[:Container]->(to);
MATCH (from:Pod),(to:Container) WHERE from.UID = "883d0094-4d70-44e5-9bc1-c029be48d1c1" AND to.UID = "6ff73eeb-71a7-11e5-c790-5e6991e35a4e" MERGE (from)-[:Container]->(to);
MATCH (from:DaemonSet),(to:Pod) WHERE from.UID = "89f096b0-2d51-4fde-87d3-5c45bcd48cac" AND to.UID = "883d0094-4d70-44e5-9bc1-c029be48d1c1" MERGE (from)-[:Pod]->(to);
MATCH (from:Pod),(to:Container) WHERE from.UID = "8b44f716-80db-4f26-a531-e914a8cfd1d5" AND to.UID = "bc63ed66-931a-d006-21bf-67c4ca5e9fb9" MERGE (from)-[:Container]->(to);
MATCH (from:Service),(to:Endpoints) WHERE from.UID = "d357fc06-76c6-4033-9f97-62344224890a" AND to.UID = "0ec3f2ac-a94d-48f3-b228-a1afe028b6a6" MERGE (from)-[:Endpoints]->(to);
MATCH (from:Pod),(to:Container) WHERE from.UID = "e57a1308-424c-470c-a1f0-30be62431043" AND to.UID = "2bb1b09b-967c-115e-157f-195b0c65d612" MERGE (from)-[:Container]->(to);
MATCH (from:ReplicaSet),(to:Pod) WHERE from.UID = "f18e0947-02a1-4a7d-801f-4d8623f0f078" AND to.UID = "5728b70d-b9d5-4c93-b8c7-3ca5389a9d4f" MERGE (from)-[:Pod]->(to);
MATCH (from:ReplicaSet),(to:Pod) WHERE from.UID = "f18e0947-02a1-4a7d-801f-4d8623f0f078" AND to.UID = "4458d1a1-4914-4f8e-9100-a6eae77d34f4" MERGE (from)-[:Pod]->(to);
MATCH (cl:Cluster) WHERE cl.UID = "cluster_127.0.0.1" MATCH (node) WHERE node.ClusterName = cl.Name AND node.Namespace IS NULL AND NOT(()-[]->(node)) MERGE (node)-[:Cluster]->(cl);
MATCH (ns:Namespace) WHERE ns.UID = "namespace_kube-system" MATCH (node) WHERE node.Namespace = ns.Name AND NOT(()-[]->(node)) MERGE (node)-[:Namespace]->(ns);
:commit

Can you please make documentation even more clear please?

[yashbhutwala]

OK I see the results now. 2 things:

1. can you improve docs on how to explore within neo4j? as a total noob to neo4j, it was kinda difficult for me.
2. can you add proper logging in your tool for failures, success, and long running processes? since it takes a while to run and there is no log, it's easy to assume something's wrong or the program is hung...

[steveteuber]

Thanks for your feedback, I will improve these things!