vpphelper provides helper functions (using govpp) that helps to connect to VPP and configure VPP using a configuration (.conf) file.

StartAndDialContext function starts VPP using a VPP configuration file and returns a Connection to VPP.

conn, vppErrCh := vpphelper.StartAndDialContext(connectCtx)

The following two functional options can also be passed as parameters to the StartAndDialContext function:

1. WithRootDir : sets the root directory for all .conf files
2. WithVppConfig : sets vpp.conf file template. All the %[1]s in the template will be replaced by the rootDir.

conn, vppErrCh := vpphelper.StartAndDialContext(connectCtx, vpphelper.WithRootDir("/tmp/vpp2"), vpphelper.WithVppConfig(newVppConfContents))

Note: newVppConfContents variable in above code snippet is a multiline string having vpp.conf template. An example of such template is available in vpp.conf.go.