How to add scripts that rely on curl

[chrisbloemker]

Hello,

I am curious what would be the best way to install packages like curl and jq for scripts like this:

- name: website_health
  script: curl -s -o /dev/null -w "%{http_code}" https://google.com
  timeout: 5

I know blackbox_exporter is more suited for this case but I am looking to do more advanced things like this such as curling an Elasticsearch endpoint and filter through json output for a value.

I have tried adding curl after the apk add statement where it installs bash but I receive the following error

------
 > [build-env 3/7] RUN go get -u github.com/prometheus/promu:
#9 6.835 package github.com/google/go-github/v25/github: cannot find package "github.com/google/go-github/v25/github" in any of:
#9 6.835 	/usr/local/go/src/github.com/google/go-github/v25/github (from $GOROOT)
#9 6.835 	/go/src/github.com/google/go-github/v25/github (from $GOPATH)
------
executor failed running [/bin/sh -c go get -u github.com/prometheus/promu]: exit code: 1

Here is my Dockerfile I am trying to build from:

FROM golang:1.14.1-alpine AS build-env

RUN apk add --update git gcc libc-dev
RUN go get -u github.com/prometheus/promu

RUN mkdir script_exporter
COPY .promu.yml script_exporter.go go.mod go.sum /go/script_exporter/

WORKDIR /go/script_exporter
RUN promu build

FROM alpine:3.11
LABEL upstream="https://github.com/adhocteam/script_exporter"
LABEL maintainer="james.kassemi@adhocteam.us"
RUN apk add --no-cache bash curl
COPY --from=build-env /go/script_exporter/script_exporter /bin/script-exporter
COPY script-exporter.yml /etc/script-exporter/config.yml

EXPOSE      9172
ENTRYPOINT  [ "/bin/script-exporter" ]
CMD ["-config.file=/etc/script-exporter/config.yml"]