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dockerfile: Give more stack space to /sbin/tini.

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/sbin/tini ends up running the Sass compiler, which seems to need a
larger thread stack size than the musl default.  This patch incorporates
a fix from
https://raw.githubusercontent.com/jubel-han/dockerfiles/master/common/stack-fix.c,
as described in https://github.com/sass/node-sass/issues/2031.
This commit is contained in:
David Yip 2017-12-22 00:07:02 +00:00
parent 095a00ef3d
commit f13ebd02c9
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GPG key ID: 7DA0036508FCC0CC
3 changed files with 36 additions and 1 deletions
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3
Dockerfile
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@ -61,6 +61,9 @@ RUN apk -U upgrade \
&& rm -rf /tmp/* /var/cache/apk/*
COPY Gemfile Gemfile.lock package.json yarn.lock .yarnclean /mastodon/
COPY stack-fix.c /lib
RUN gcc -shared -fPIC /lib/stack-fix.c -o /lib/stack-fix.so
RUN rm /lib/stack-fix.c
RUN bundle config build.nokogiri --with-iconv-lib=/usr/local/lib --with-iconv-include=/usr/local/include \
&& bundle install -j$(getconf _NPROCESSORS_ONLN) --deployment --without test development \

2
docker_entrypoint.sh
View file

@ -11,4 +11,4 @@ echo "Updating permissions..."
find /mastodon -path /mastodon/public/system -prune -o -not -user mastodon -not -group mastodon -print0 | xargs -0 chown -f mastodon:mastodon
echo "Executing process..."
exec su-exec mastodon:mastodon /sbin/tini -- "$@"
LD_PRELOAD=/lib/stack-fix.so exec su-exec mastodon:mastodon /sbin/tini -- "$@"

32
stack-fix.c Normal file
View file

@ -0,0 +1,32 @@
#include <dlfcn.h>
#include <pthread.h>
#include <stdio.h>
// THIS IS TO AVOID A SIGFAULT WHEN RUNNING python3.6 manage.py runserver
// This should be fixed at some point by Alpine and/or Python
// Check this issue for more info
// https://github.com/docker-library/python/issues/211
typedef int (*func_t)(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void*), void *arg);
int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void*), void *arg) {
pthread_attr_t local;
int used = 0, ret;
if (!attr) {
used = 1;
pthread_attr_init(&local);
attr = &local;
}
pthread_attr_setstacksize((void*)attr, 2 * 1024 * 1024); // 2 MB
func_t orig = (func_t)dlsym(RTLD_NEXT, "pthread_create");
ret = orig(thread, attr, start_routine, arg);
if (used) {
pthread_attr_destroy(&local);
}
return ret;
}