Error: Dockerfile cannot be empty

[edannenberg]

Error: Dockerfile cannot be empty

[jbergstroem]

You need to build these images on a gentoo install (for now) since it assumes some packages are available. Once the images are done you can pass them to whatever docker host you want (such as core os).

@edannenberg How about checking for /etc/gentoo-release for now?

[edannenberg]

env: envsubst: No such file or directory

gettext's envsubst is used to create the dockerfile, you could try installing gettext on the core-os host.

@jbergstroem might be enough to check for envsubst in $PATH

[jbergstroem]

@edannenberg Haven't tried running it from any dist, which is why I at least suggested a known state.

As for envsubst, how about possibly replacing it with seds?

[theRemix]

@jbergstroem i've been attempting to build these images on a gentoo box, it isn't that easy.

i've been having a hard time installing docker on any of the available gentoo base systems, kernel requirements and such

 *   CONFIG_DEVPTS_MULTIPLE_INSTANCES:  is not set when it should be.
 *   CONFIG_CGROUP_DEVICE:   is not set when it should be.
 *   CONFIG_MACVLAN:   is not set when it should be.
 *   CONFIG_VETH:  is not set when it should be.
 *   CONFIG_BRIDGE:  is not set when it should be.
 *   CONFIG_NETFILTER_XT_MATCH_ADDRTYPE:   is not set when it should be.
 *   CONFIG_MEMCG_SWAP: is required if you wish to limit swap usage of containers
 *   CONFIG_CGROUP_PERF: is optional for container statistics gathering
 *   CONFIG_DM_THIN_PROVISIONING:  is not set when it should be.

so do you know of any gentoo installs in the docker registry that already have docker installed on it so that i can build mini images using gentoo-bb?

[jbergstroem]

@theRemix we're currently looking into replacing envsubst with sed, but as for gentoo - all you really have to do is to build these kernel modules and install them. There's a guide to working with the gentoo kernel procedure (not really specific unless you use genkernel) here. Just hit slash and search for above modules, locate them and build/install them.

Edit: It would probably work just as fine if you ran these build scripts from ubuntu, debian or similar.