add very basic non-docker testing for hashicorp/nomad#24339

(cleanup after yourself)

gh-24339/no-docker/.gitignore

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+nomad*

gh-24339/no-docker/.screenrc

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+screen -t consul 1 sudo consul agent -config-file=cfg/consul-server.hcl 
+screen -t server 2 sudo ./nomad agent -config=cfg/nomad-server.hcl -server
+screen -t client 3 sudo ./nomad agent -config=cfg/nomad-client.hcl -client
+screen -t stats  4 ./test

gh-24339/no-docker/README.md

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+# non-docker test method
+- requires 
+  - screen
+  - nomad
+  - consul
+- start: `screen -c .screenrc`

gh-24339/no-docker/cfg/consul-server.hcl

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+datacenter = "global"
+primary_datacenter = "global"
+data_dir = "/tmp/consul-data"
+bind_addr = "127.0.0.1"
+client_addr = "0.0.0.0"
+server = true
+bootstrap = true
+
+ui_config {
+  enabled = true
+}
+peering {
+  enabled = true
+}
+connect {
+  enabled = true
+}
+
+ports {
+  http  = 8500
+}
+
+disable_update_check = true
+disable_remote_exec = true
+enable_script_checks = true

gh-24339/no-docker/start

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+#!/bin/bash
+VNOMAD="${1:-1.9.3}"
+case `uname -m` in  
+	aarch64) ARCH=arm64;;
+	x86_64) ARCH=amd64;;
+esac
+
+if test ! -f nomad_${VNOMAD}_linux_${ARCH}.zip
+then
+curl -L -o nomad_${VNOMAD}_linux_${ARCH}.zip https://releases.hashicorp.com/nomad/${VNOMAD}/nomad_${VNOMAD}_linux_${ARCH}.zip
+fi
+unzip -o nomad_${VNOMAD}_linux_${ARCH}.zip nomad
+./nomad version  
+
+read -n1 -p "Proceed with test nomad ${VNOMAD} ${ARCH} ? (y = yes) " -r approval
+echo
+if [[ "$approval" =~ [Yy] ]]
+then 
+ echo OK
+ screen -c .screenrc
+else 
+ echo Abort Abort Abort Abort Abort
+fi

gh-24339/no-docker/test

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+echo "wait a bit before submitting job to allow nomad to settle"
+sleep 60
+
+cat << EOF > /tmp/test-job
+#  from https://github.com/hashicorp/nomad/issues/24339
+job "example-job" {
+  group "cache" {
+    count = 20
+    ephemeral_disk {
+      size    = 10
+    }
+
+    task "redis" {
+      driver = "docker"
+      config {
+        image          = "redis:7"
+        auth_soft_fail = true
+      }
+
+      logs {
+        max_files = 3
+        max_file_size = 3
+      }
+
+      identity {
+        env  = true
+        file = true
+      }
+
+      resources {
+        cpu    = 100
+        memory = 64
+      }
+    }
+  }
+}
+EOF
+
+nomad job run /tmp/test-job
+
+
+localip="${1:-127.0.0.1}"
+localport="${2:-4000}"
+
+while true;
+do
+
+nomad_client_tasks_running=$(curl "http://${localip}:${localport}/v1/metrics?format=prometheus" 2>/dev/null|grep ^nomad_client_tasks_running|cut -f2 -d\} | awk '{print $1}')
+nomad_client_allocs_memory_usage_count=$(curl "http://${localip}:${localport}/v1/metrics?format=prometheus" 2>/dev/null|grep -v ^# | grep alloc|grep nomad_client_allocs_memory_usage | wc -l )
+
+if test -z "$nomad_client_tasks_running"; then nomad_client_tasks_running=-1;fi
+if test -z "$nomad_client_allocs_memory_usage_count"; then nomad_client_allocs_memory_usage_count=-1;fi
+
+if test $nomad_client_tasks_running -eq $nomad_client_allocs_memory_usage_count
+then
+ echo "check $i :: ALL OK $nomad_client_tasks_running == $nomad_client_allocs_memory_usage_count"
+else
+ echo "check $i :: MISMATCH $nomad_client_tasks_running != $nomad_client_allocs_memory_usage_count"
+fi
+
+sleep 5
+done