I'd like to build an image using ARG and DOCKER_CONTENT_TRUST activated, with Docker v18.06.1-ce
Dockerfile:
ARG tag
FROM busybox:${tag}
Run docker build --build-arg tag=1.33.1 . OK
Then, active Content Trust export DOCKER_CONTENT_TRUST=1
Re-run docker build --build-arg tag=1.33.1 . NOK
Error received :
Sending build context to Docker daemon
error during connect: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.38/build?buildargs=%7B%22tag%22%3A%221.33.1%22%7D&cachefrom=%5B%5D&cgroupparent=&cpuperiod=0&cpuquota=0&cpusetcpus=&cpusetmems=&cpushares=0&dockerfile=Dockerfile&labels=%7B%7D&memory=0&memswap=0&networkmode=default&rm=1&shmsize=0&target=&ulimits=null&version=1: invalid reference format
Any idea how to fix this issue ?
N.B: only happens on FROM instruction
