I am in a restricted environment where I cannot install Docker or Node.JS . Anyone have a simple nomad JOB thatI can test with ? I have created my first cluster and would love to try a job .
I did create a job using this link Running bash scripts as a task in nomad using raw_exec driver but I am getting the following error
Task Group “cache” (failed to place 1 allocation):
- Constraint “missing drivers” : 4 nodes excluded by filter .
I see the job in the UI but it shows pending and on my command line it shows “deployment in progress” perhaps a simple job is not my problem but would love to try something different .
Any help is appreciated
Hi @sammy676776 !
For the most simple job imaginable, I typically use this - which just calls sleep using the raw_exec driver
job "example" {
group "group1" {
task "sleep" {
driver = "raw_exec"
config {
command = "sleep"
args = ["infinity"]
}
resources {
cpu = 10
memory = 10
}
}
}
}
For a simple HTTP server, I like to use this job which just uses python3’s built-in http.server module
job "example2" {
group "group" {
network {
mode = "host"
port "http" { static = 8888 }
}
task "pyhttp" {
driver = "raw_exec"
config {
command = "python3"
args = ["-m", "http.server", "${NOMAD_PORT_http}", "--directory", "/tmp"]
}
service {
name = "py"
port = "http"
provider = "nomad"
check {
type = "http"
path = "/"
interval = "3s"
timeout = "1s"
}
}
}
}
}
Also note that raw_exec driver is not available by default on normal clusters -you have to enable it manually as a plugin option
If you are on Linux, it’s probably better to just use the exec driver instead, which leverages chroot, and cgroups for resource isolation.
Thank you . Will try and post the result .
Perhaps there is some other issue going on in my new cluster that I built as even this simple job failed .
in my Server.hcl I have
> plugin "raw_exec" {
> config {
> enabled = true
> no_cgroups = true
> }
> }
client.hcl
options {
"driver.allowlist" = "raw_exec"
}
}
plugin "raw_exec" {
config {
enabled = true
no_cgroups = true
}
}
When I submit the job it appears in the UI but shows failed . It also shows the alloc and clients . How can I be sure that the server has communicated to clients properly ? Is there anything I can check ? J
I ran “nomad server members -detailed” and I can see all server details including the clients . I can go to UI and see both servers and clients . When I run the job does it deploy to the clients and if it was successful will it say something in client or server log ? If so where ?
thanks in advance
Meant to say I also ran “nomad node status -stats” and it shows all clients . I am running your “sleep” raw_exec job and here is the status
nomad job status test
ID = test
Name = test
Submit Date = 2023-02-24T03:37:59-05:00
Type = service
Priority = 50
Datacenters = <removed>
Namespace = default
Status = pending
Periodic = false
Parameterized = false
Summary
Task Group Queued Starting Running Failed Complete Lost Unknown
group1 0 0 0 6 0 0 0
Future Rescheduling Attempts
Task Group Eval ID Eval Time
group1 dd05e2f2 14m5s from now
Latest Deployment
ID = 648402a6
Status = running
Description = Deployment is running
Deployed
Task Group Desired Placed Healthy Unhealthy Progress Deadline
group1 1 2 0 2 2023-02-24T03:47:59-05:00
Allocations
ID Node ID Task Group Version Desired Status Created Modified
66e60599 24d34bf1 group1 2 run failed 1m55s ago 1m54s ago
8a0272fe 24d34bf1 group1 2 stop failed 9m56s ago 1m55s ago
e861a442 15ceea08 group1 0 stop failed 15m7s ago 9m56s ago
22defb0d 24d34bf1 group1 0 stop failed 17m7s ago 15m7s ago
a3d18006 098cf534 group1 0 stop failed 18m7s ago 17m7s ago
1d3fdcf0 dd964482 group1 0 stop failed 18m37s ago 18m7s ago
Based on the above output I also ran
nomad alloc status --short 66e60599
ID = 66e60599-f557-8d35-f021-266e7e7013c5
Name = test.group1[0]
Created = 4m10s ago
Modified = 4m9s ago
Tasks
Name State Last Event Time Lifecycle
sleep dead Not Restarting 2023-02-24T03:45:59-05:00 main