将Prometheus部署到Cloud Foundry

Question

I want to deploy Prometheus to Cloud Foundry without using Docker container. When I try to deploy it with the standard Cloud Foundry Go Buildpack I get the following error:

can't load package: package prometheus: no buildable Go source files in /tmp/tmp.vv4iyDzMvE/.go/src/prometheus

Which somehow makes sense, because there are actually no sources in the root directory and the project is compiled with the Prometheus utility tool.

Is there any way to deploy Prometheus to Cloud Foundry, like using another Buildpack or something?

Answer 1

Ok, after digging around a bit I got the whole thing working as follows

manifest.yml

---
applications:
- name: prometheus
  instances: 1
  buildpack: https://github.com/cloudfoundry/go-buildpack.git
  command: prometheus
  env:
    GOPACKAGENAME: github.com/prometheus/prometheus
    GO_INSTALL_PACKAGE_SPEC: github.com/prometheus/prometheus/cmd/prometheus
  memory: 1000M

BUT in order to listen on the right port, the only solution I could find is adding the following to the cmd/prometheus/config.go file to the beginning of the init() function

port := ":9090"
if s := os.Getenv("PORT"); s != "" {
    port = ":"+s
}

and then changing the following part (also in the init() function)

cfg.fs.StringVar(
    &cfg.web.ListenAddress, "web.listen-address", ":9090",
    "Address to listen on for the web interface, API, and telemetry.",
)

to

cfg.fs.StringVar(
    &cfg.web.ListenAddress, "web.listen-address", port,
    "Address to listen on for the web interface, API, and telemetry.",
)

After that you can simply deploy the application with cf push and everything should work as a charm