Simplify first usage

[fgschwan]

It would be great to the one line command to start vpp-probe. Even one line installation would be great (it would be with one line vpp-probe start only 2 commands).

[ondrej-fabry]

One line command to install vpp-probe is now possible:

# for go1.16+
go get go.ligato.io/vpp-probe

# and for go1.15 (or older)
GO111MODULE=on go get go.ligato.io/vpp-probe

and one line command to discover VPP instances:

# in local environment
vpp-probe discover

# in Kubernetes environment
vpp-probe --env kube discover

# in Docker environment
vpp-probe --env docker discover

[fgschwan]

Just tested this with local docker containers and it doesn't work for docker (reported here #11, #12)

[ondrej-fabry]

There are now 3 ways to get the vpp-probe described in the README: https://github.com/ligato/vpp-probe#install

The easiest for Go devs is to run:

# go1.16+
go install go.ligato.io/vpp-probe@latest

# go1.15 and older
GO111MODULE=on go get go.ligato.io/vpp-probe@latest

for others using the published Docker image ligato/vpp-probe is probably the most convenient.

I plan to add the helper script for getting the latest pre-compiled binary from GitHub releases so users can simply run something like curl ligato.io/get-vpp-probe | bash to install the latest vpp-probe.