Error with /bin/s6-svscan

[LM1LC3N7]

Hello,

Something weird happened at launch, I can't figured why:

>>> wonderfall/ghost container <<<

> Initializing content folder...
> Applying preferences...
> Updating permissions... (SKIPPED)
> Executing process...
Error loading shared library libs6.so.2.7: Permission denied (needed by /bin/s6-svscan)
Error loading shared library libskarnet.so.2.6: Permission denied (needed by /bin/s6-svscan)
Error relocating /bin/s6-svscan: strerr_diesys: symbol not found
Error relocating /bin/s6-svscan: selfpipe_init: symbol not found
Error relocating /bin/s6-svscan: tain_add: symbol not found
Error relocating /bin/s6-svscan: tain_less: symbol not found
Error relocating /bin/s6-svscan: fd_read: symbol not found
Error relocating /bin/s6-svscan: strerr_warn: symbol not found
Error relocating /bin/s6-svscan: fd_close: symbol not found
Error relocating /bin/s6-svscan: iopause_stamp: symbol not found
Error relocating /bin/s6-svscan: tain_addsec: symbol not found
Error relocating /bin/s6-svscan: tain_now: symbol not found
Error relocating /bin/s6-svscan: child_spawn0: symbol not found
Error relocating /bin/s6-svscan: s6_supervise_lock: symbol not found
Error relocating /bin/s6-svscan: strerr_warnsys: symbol not found
Error relocating /bin/s6-svscan: pipe_internal: symbol not found
Error relocating /bin/s6-svscan: waitpid_nointr: symbol not found
Error relocating /bin/s6-svscan: selfpipe_read: symbol not found
Error relocating /bin/s6-svscan: sig_name: symbol not found
Error relocating /bin/s6-svscan: selfpipe_trapset: symbol not found
Error relocating /bin/s6-svscan: tain_from_millisecs: symbol not found
Error relocating /bin/s6-svscan: strerr_die: symbol not found
Error relocating /bin/s6-svscan: xpathexec_run: symbol not found
Error relocating /bin/s6-svscan: subgetopt_r: symbol not found
Error relocating /bin/s6-svscan: uint320_scan_base: symbol not found
Error relocating /bin/s6-svscan: skasigaction: symbol not found
Error relocating /bin/s6-svscan: fd_move: symbol not found
Error relocating /bin/s6-svscan: selfpipe_finish: symbol not found
Error relocating /bin/s6-svscan: sanitize_read: symbol not found
Error relocating /bin/s6-svscan: dir_close: symbol not found
Error relocating /bin/s6-svscan: STAMP: symbol not found
Error relocating /bin/s6-svscan: PROG: symbol not found
Error relocating /bin/s6-svscan: tain_infinite_relative: symbol not found
Error relocating /bin/s6-svscan: SKASIG_IGN: symbol not found

[LM1LC3N7]

The problem is not because of s6 incompatibility but is caused by su-exec ${UID} ${GID}.

When I execute S6 as root (only for testing!) there is no errors (in /usr/local/bin/run.sh):

# Run as root FOR TESTING ONLY
exec /bin/s6-svscan /etc/s6.d

I found that permissions on /bin/s6-svscan seems incorrect (root:root) and are not changed by the run script:

echo "> Updating permissions..."
chown -R ${UID}:${GID} /ghost /etc/s6.d

I don't think that /bin/s6-svscan can be started with su-exec ${UID}:${GID} if it belong to root.

So I tried to update the run script:

echo "> Updating permissions..."
chown -R ${UID}:${GID} /ghost /etc/s6.d /bin/s6*

Permissions are applied:

# ls -alh /bin/s6-*
-rwxr-xr-x    1 991      991        13.6K Dec 17 17:04 /bin/s6-tai64nlocal

But the error is the same:

/ghost # exec su-exec ${UID}:${GID} /bin/s6-svscan /etc/s6.d
Error loading shared library libs6.so.2.7: Permission denied (needed by /bin/s6-svscan)
Error loading shared library libskarnet.so.2.7: Permission denied (needed by /bin/s6-svscan)
Error relocating /bin/s6-svscan: strerr_diesys: symbol not found
Error relocating /bin/s6-svscan: selfpipe_init: symbol not found
Error relocating /bin/s6-svscan: tain_add: symbol not found
Error relocating /bin/s6-svscan: tain_less: symbol not found
Error relocating /bin/s6-svscan: fd_read: symbol not found
Error relocating /bin/s6-svscan: strerr_warn: symbol not found
Error relocating /bin/s6-svscan: fd_close: symbol not found
Error relocating /bin/s6-svscan: iopause_stamp: symbol not found
Error relocating /bin/s6-svscan: tain_addsec: symbol not found
Error relocating /bin/s6-svscan: tain_now: symbol not found
Error relocating /bin/s6-svscan: child_spawn0: symbol not found
Error relocating /bin/s6-svscan: s6_supervise_lock: symbol not found
Error relocating /bin/s6-svscan: strerr_warnsys: symbol not found
Error relocating /bin/s6-svscan: pipe_internal: symbol not found
Error relocating /bin/s6-svscan: waitpid_nointr: symbol not found
Error relocating /bin/s6-svscan: selfpipe_read: symbol not found
Error relocating /bin/s6-svscan: sig_name: symbol not found
Error relocating /bin/s6-svscan: selfpipe_trapset: symbol not found
Error relocating /bin/s6-svscan: tain_from_millisecs: symbol not found
Error relocating /bin/s6-svscan: strerr_die: symbol not found
Error relocating /bin/s6-svscan: xpathexec_run: symbol not found
Error relocating /bin/s6-svscan: subgetopt_r: symbol not found
Error relocating /bin/s6-svscan: fd_write: symbol not found
Error relocating /bin/s6-svscan: uint320_scan_base: symbol not found
Error relocating /bin/s6-svscan: skasigaction: symbol not found
Error relocating /bin/s6-svscan: fd_move: symbol not found
Error relocating /bin/s6-svscan: selfpipe_finish: symbol not found
Error relocating /bin/s6-svscan: sanitize_read: symbol not found
Error relocating /bin/s6-svscan: dir_close: symbol not found
Error relocating /bin/s6-svscan: STAMP: symbol not found
Error relocating /bin/s6-svscan: PROG: symbol not found
Error relocating /bin/s6-svscan: tain_infinite_relative: symbol not found
Error relocating /bin/s6-svscan: SKASIG_IGN: symbol not found

Starting as root is still working:

/ghost # exec /bin/s6-svscan /etc/s6.d
(node:35) Warning: a promise was created in a handler at /ghost/node_modules/tarn/lib/Pool.js:310:24 but was not returned from it, see http://goo.gl/rRqMUw
    at new Promise (/ghost/node_modules/bluebird/js/release/promise.js:79:10)
(node:35) Warning: a promise was created in a handler at /ghost/node_modules/tarn/lib/Pool.js:280:14 but was not returned from it, see http://goo.gl/rRqMUw
    at new Promise (/ghost/node_modules/bluebird/js/release/promise.js:79:10)
(node:35) Warning: a promise was created in a handler at /ghost/node_modules/tarn/lib/Pool.js:197:21 but was not returned from it, see http://goo.gl/rRqMUw
    at Function.Promise.fromNode.Promise.fromCallback (/ghost/node_modules/bluebird/js/release/promise.js:177:9)
[2019-02-05 09:27:33] INFO Finished database init!

My last try was to only set the UID and not the GID:

echo "> Updating permissions..."
chown -R ${UID} /ghost /etc/s6.d

And this is working (as $UID user).

Any thoughts why setting the GID is not working?

[LM1LC3N7]

I tried to clone your project, create the docker image locally and start my container: same error.
The only solution is to download your image from hub.docker.com or change the startup command to remove GID:

echo "> Updating permissions..."
chown -R ${UID} /ghost /etc/s6.d

I really, really don't understand why I can't I have a valid image from your Dockerfile.