docs: demo tape for initial otel

example/otel/example.nomad.hcl

@@ -2,10 +2,9 @@ job "example" {
   group "demo" {
     task "app" {
       driver = "docker"
-
       config {
         image = "busybox:1.36.1"
-        args  = ["/bin/sh", "-c", "env | grep OTEL_ && sleep 1h"]
+        args  = ["/bin/sh", "-c", "env && sleep 1h"]
       }
     }
   }

example/otel/example.nomad.ref.hcl

@@ -2,12 +2,10 @@ job "example" {
   group "demo" {
     task "app" {
       driver = "docker"
-      meta {
-        otel = "true"
-      }
+      meta { otel = "true" }
       config {
         image = "busybox:1.36.1"
-        args  = ["/bin/sh", "-c", "env | grep OTEL_ && sleep 1h"]
+        args  = ["/bin/sh", "-c", "env && sleep 1h"]
       }
     }
   }

example/otel/otel-demo.tape

@@ -0,0 +1,64 @@
+Output otel-demo.mp4
+
+Require echo
+Require nomad
+Require vim
+Require bat
+
+
+Set Shell "bash"
+Set FontSize 16
+Set Width 1200
+Set Height 600
+
+
+Set TypingSpeed 100ms
+
+Type `echo "Let's run a simple nomad job"` Enter
+Type `vim demo.nomad.hcl` Enter
+Set TypingSpeed 50ms
+Type i
+
+Type `job "example" {` Enter
+Type ` group "demo" {` Enter
+Type `  task "app" {` Enter
+Type `   driver = "docker"` Enter
+Type `   config {` Enter
+Type `    image = "busybox:1.36.1"` Enter
+Type `     args  = ["/bin/sh", "-c", "env && sleep 1h"]` Enter
+Type `   }` Enter
+Type `  }` Enter
+Type ` }` Enter
+Type `}` Enter
+Escape
+Type `:wq` Enter
+Set TypingSpeed 100ms
+Sleep 2s
+
+
+Type `nomad run -detach demo.nomad.hcl` Enter
+Sleep 5s
+Type `echo "Let's check the env vars of our job"` Enter
+Type `nomad exec -job example sh -c 'env | grep OTEL_'` Enter
+Sleep 1s
+Type `echo "No 'OTEL_' env vars, let's update the job to enable otel"` Enter
+Type `vim demo.nomad.hcl` Enter
+Sleep 1s
+Down Down Down Down
+Type i
+Enter
+Up
+Sleep 500ms
+Type `   meta { otel = "true" }`
+Sleep 500ms
+Escape
+Type `:wq` Enter
+Sleep 1s
+Type `echo "Let's run the updated job"` Enter
+Type `nomad run -detach demo.nomad.hcl` Enter
+Sleep 6s
+Type `echo "Let's check the env vars of our job again"` Enter
+Type `nomad exec -job example sh -c 'env | grep OTEL_'` Enter
+Sleep 1s
+
+Type `echo "yey, it worked!"` Enter Sleep 5s

example/otel/otel.rego

@@ -4,7 +4,7 @@ import rego.v1
 
 # check for all task if they have a "Meta" field "otel" = "true"
 # if it doesn't have a Templates field or its null create a patch for that
-
+# inject the same data as mentioned here: https://github.com/hashicorp/nomad/commit/fb4887505c82346a8f9046f956530058ab92e55a#diff-ad403bc14b99a07b6bf1d5599b9109113bc30d03afd88d7c007dd55f1bdb6b2cR44
 add_templates_list_ops contains op if {
 	some g, t
 	input.TaskGroups[g].Tasks[t].Meta.otel == "true"

example/otel/tape.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+rm otel-demo.mp4
+rm demo.nomad.hcl
+
+export NOMAD_ADDR='http://localhost:6464'
+exec vhs otel-demo.tape