How do I view the logs from a task in Argo? - kubernetes

Question

I am using Argo and have a question about the workflow of workflows example. (https://github.com/argoproj/argo-workflows/blob/master/examples/workflow-of-workflows.yaml)
UPDATED YET AGAIN
As pointed out below, it is a task that I need to view. So my question is now - How do I view the logs from a task?
My workflow completes without error, but does not produce the expected output. I would like to look at the logs of one of the containers within one of the workflows within the overall workflow, but I cannot get the syntax right I am using the following convention to get the logs from the relevant pod.
argo logs -n argo wf-name pod-name
and getting:
workflow-of-workflows-k8fm5-3824346685: 2021-04-05T17:55:43.360917900Z time="2021-04-05T17:55:43.360Z" level=info msg="Starting Workflow Executor" executorType= version="{untagged 2021-04-05T17:09:35Z 79eb50b42e948466f82865b8a79756b57f9b66d9 untagged clean go1.15.7 gc linux/amd64}"
workflow-of-workflows-k8fm5-3824346685: 2021-04-05T17:55:43.362737800Z time="2021-04-05T17:55:43.362Z" level=info msg="Creating a docker executor"
workflow-of-workflows-k8fm5-3824346685: 2021-04-05T17:55:43.362815200Z time="2021-04-05T17:55:43.362Z" level=info msg="Executor (version: untagged, build_date: 2021-04-05T17:09:35Z) initialized (pod: argo/workflow-of-workflows-k8fm5-3824346685) with template:\n{\"name\":\"run\",\"inputs\":{\"parameters\":[{\"name\":\"runTemplate\",\"value\":\"demo1run.yaml\"}]},\"outputs\":{},\"metadata\":{},\"resource\":{\"action\":\"create\",\"manifest\":\"# Example of using a hard-wired artifact location from a HTTP URL.\\napiVersion: argoproj.io/v1alpha1\\nkind: Workflow\\nmetadata:\\n generateName: message-passing-1-\\n namespace: argo\\nspec:\\n serviceAccountName: argo\\n entrypoint: entrypoint\\n\\n templates:\\n\\n - name: echo\\n container:\\n image: weilidma/curl:0.4\\n command:\\n - \\\"/bin/bash\\\"\\n - \\\"-c\\\"\\n args:\\n - \\\"cat /mnt/raw/raw1.json \\u0026\\u0026 exit\\\"\\n volumeMounts:\\n - name: raw-p1-vol\\n mountPath: /mnt/raw\\n - name: log-p1-vol\\n mountPath: /mnt/logs/\\n\\n - name: process1\\n container:\\n image: weilidma/curl:0.4\\n command: \\n - \\\"/bin/bash\\\"\\n - \\\"-c\\\"\\n args: \\n - \\\"jq \\\\u0027[.data[].Platform |= test(\\\\u0022Healy\\\\u0022) | .[][] | select(.Platform == true) | {survey: .Survey, url: .\\\\u0022Data Access\\\\u0022}]\\\\u0027 /mnt/raw/raw1.json \\u003e /mnt/processed/filtered1.json \\u0026\\u0026 exit\\\"\\n volumeMounts:\\n - name: raw-p1-vol\\n mountPath: /mnt/raw/\\n - name: processed-p1-vol\\n mountPath: /mnt/processed/\\n - name: log-p1-vol\\n mountPath: /mnt/logs/\\n\\n - name: process2\\n container:\\n image: weilidma/curl:0.4\\n command: \\n - \\\"/bin/bash\\\"\\n - \\\"-c\\\"\\n args: \\n - \\\"jq \\\\u0027[.data[].Platform |= test(\\\\u0022Healy\\\\u0022) | .[][] | select(.Platform == true) | {survey: .Survey, url: .\\\\u0022Data Access\\\\u0022}]\\\\u0027 /mnt/raw/raw2.json \\u003e /mnt/processed/filtered2.json \\u0026\\u0026 exit\\\"\\n volumeMounts:\\n - name: raw-p2-vol\\n mountPath: /mnt/raw/\\n - name: processed-p2-vol\\n mountPath: /mnt/processed/\\n - name: log-p2-vol\\n mountPath: /mnt/logs/\\n\\n - name: join\\n container:\\n image: weilidma/curl:0.4\\n command: \\n - \\\"/bin/bash\\\"\\n - \\\"-c\\\"\\n args: \\n - \\\"jq -n --slurpfile f1 /mnt/processed1/filtered1.json --slurpfile f2 /mnt/processed2/filtered2.json -f .jq/join.jq --arg field \\\\u0022survey\\\\u0022 \\u003e /mnt/processed1/output.json \\u0026\\u0026 exit\\\"\\n volumeMounts:\\n - name: processed-p1-vol\\n mountPath: /mnt/processed1/\\n - name: processed-p2-vol\\n mountPath: /mnt/processed2/\\n - name: log-p1-vol\\n mountPath: /mnt/logs1/\\n - name: log-p2-vol\\n mountPath: /mnt/logs2/\\n\\n - name: egress\\n inputs:\\n parameters:\\n - name: ipaddr\\n container:\\n image: weilidma/curl:0.4\\n command: \\n - \\\"/bin/bash\\\"\\n - \\\"-c\\\"\\n args: \\n - \\\"cat /mnt/processed/output.json \\u0026\\u0026 exit\\\"\\n volumeMounts:\\n - name: processed-p1-vol\\n mountPath: /mnt/processed/\\n - name: log-p1-vol\\n mountPath: /mnt/logs/\\n\\n - dag:\\n tasks:\\n - name: echo\\n template: echo\\n dependencies:\\n - name: p1\\n template: process1\\n dependencies:\\n\\n - name: p2\\n template: process2\\n dependencies:\\n\\n - name: j\\n template: join\\n dependencies:\\n - p1\\n - p2\\n\\n - name: e\\n template: egress\\n arguments:\\n parameters: \\n - name: ipaddr \\n value: 'https://192.241.129.100'\\n dependencies:\\n - j\\n\\n name: entrypoint\\n\"}}"
workflow-of-workflows-k8fm5-3824346685: 2021-04-05T17:55:43.362847900Z time="2021-04-05T17:55:43.362Z" level=info msg="Loading manifest to /tmp/manifest.yaml"
workflow-of-workflows-k8fm5-3824346685: 2021-04-05T17:55:43.362942100Z time="2021-04-05T17:55:43.362Z" level=info msg="kubectl create -f /tmp/manifest.yaml -o json"
workflow-of-workflows-k8fm5-3824346685: 2021-04-05T17:55:43.837625500Z time="2021-04-05T17:55:43.837Z" level=info msg="Resource: argo/Workflow.argoproj.io/message-passing-1-t8749. SelfLink: /apis/argoproj.io/v1alpha1/namespaces/argo/workflows/message-passing-1-t8749"
workflow-of-workflows-k8fm5-3824346685: 2021-04-05T17:55:43.837636900Z time="2021-04-05T17:55:43.837Z" level=info msg="Starting SIGUSR2 signal monitor"
workflow-of-workflows-k8fm5-3824346685: 2021-04-05T17:55:43.837696900Z time="2021-04-05T17:55:43.837Z" level=info msg="No output parameters"
Based on this output, the container name seems to be argo/Workflow.argoproj.io/message-passing-1-t8749 but when I add that to the end I get an error. Here are the commands I have tried:
argo logs -n argo workflow-of-workflows-k8fm5 workflow-of-workflows-k8fm5-3824346685 -c argo/Workflow.argoproj.io/message-passing-1-t8749
or
argo logs -n argo workflow-of-workflows-k8fm5 workflow-of-workflows-k8fm5-3824346685 -c message-passing-1-t8749

Answer 1

Thanks to Alex of ArgoProj!
Here is a command I did not know:
kubectl get workflow
will list (surprise) workflows! From there, I could see the individual workflows embedded into the larger workflow.

Answer 2

The default container names on an Argo Workflows pod are init, main, and wait.
I'm not sure what message-passing-1-t8749 refers to, but it might be the "step/task name."