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With the assumption that Consul and Nomad has been configured to run on a pool of resource. How would you rendered a template file for the sole purpose of generating e.g. an Nginx 'default.conf' file.
Using the template stanza configuration below, as an example; Nomad fails to generate a default.conf 'file'; instead a default.conf 'directory' is created.
template {
source = "/path/to/tmp.ctmpl"
destination = "folder/default.conf"
change_mode = "restart"
change_signal = "SIGINT"
}
I'm either missing a trick, or have misunderstood the functionalities of the 'template stanza'.
One of the issue with the template generating a directory rather than a file is, you cannot mount a directory to a config file path. So running a task that uses the Nomad docker driver with the exemplar 'docker' volume config results in an error.
volumes = ["/path/to/job/folder/default.conf:/etc/nginx/conf.d/default.conf" ]
Or is it impossible to have the template stanza generate a config file?
*P.s. Using Nomad build 0.5.5**
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I just put together a little Nomad job showing this working, so you may have a slight configuration error. To allow you to run the job yourself I have made it available as a gist here. In the same gist I have a nginx.conf that has nginx listen on whatever port is in the Nomad job file.
Here is the Nomad job:
job "nginx" {
datacenters = ["dc1"]
type = "service"
group "cache" {
count = 1
task "redis" {
driver = "docker"
config {
image = "nginx:1.11.10"
volumes = ["new/default.conf:/etc/nginx/conf.d/default.conf" ]
network_mode = "host"
}
artifact {
source = "https://gist.githubusercontent.com/dadgar/2dcf68ab5c49f7a36dcfe74171ca7936/raw/c287c16dbc9ddc16b18fa5c65a37ff25d2e0e667/nginx.conf"
}
template {
source = "local/nginx.conf"
destination = "new/default.conf"
change_mode = "restart"
}
resources {
network {
mbits = 10
port "nginx" {
static = 8080
}
}
}
}
}
}
I can then query that address and see that nginx is bound to that port, thus the template being mounted is working properly.
$ curl http://127.0.0.1:8080
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
If you take a look at the gist, I show the file being rendered and mounted properly as well.
Hope this helps you! Also be sure to check out the community page for getting help. We have both a Gitter room and a mailing list.
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