Run docker-gc as a container and seems not working

[dalanlan]

After the container exits, the garbage are still there. Did i miss anything?
FYI.

$ docker ps -a
CONTAINER ID        IMAGE                                       COMMAND                CREATED             STATUS                     PORTS                    NAMES
9efcbc88a5a7        spotify/docker-gc                           "/docker-gc"           3 hours ago         Exited (0) 3 hours ago                              pensive_babbage                                                                                                        
ed3e262a531b        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago                                                             k8s_php-redis.406c1646_frontend1.1-glg6b_default_8f56aae4-1700-11e5-bbc4-005056b462d8_be7f57fd                         
56145037475a        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend1.1-glg6b_default_8f56aae4-1700-11e5-bbc4-005056b462d8_2fa8eda0                               
4072f04f94b7        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago         Exited (137) 7 weeks ago                            k8s_php-redis.406c1646_frontend1.11.11-ey77r_default_8f536ebe-1700-11e5-bbc4-005056b462d8_805defa3                     
702acf4ac038        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend1.11.11-ey77r_default_8f536ebe-1700-11e5-bbc4-005056b462d8_9837a786                           
104aacc3f82a        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago         Exited (137) 7 weeks ago                            k8s_php-redis.406c1646_frontend2-d7c10_default_8069cf68-1700-11e5-bbc4-005056b462d8_6a87bd07                           
ad69bf0c7bb4        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend2-d7c10_default_8069cf68-1700-11e5-bbc4-005056b462d8_b9b421f8                                 
c3d2e7ff2673        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago         Exited (137) 7 weeks ago                            k8s_php-redis.406c1646_frontend2-rxdc3_default_7d730dff-1700-11e5-bbc4-005056b462d8_5978a680                           
34f8428bbe87        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago         Exited (137) 7 weeks ago                            k8s_php-redis.406c1646_frontend2-g0b5x_default_7c4affa6-1700-11e5-bbc4-005056b462d8_8d471ab5                           
561c3a2d848b        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend2-rxdc3_default_7d730dff-1700-11e5-bbc4-005056b462d8_c0070f2f                                 
a040e2208567        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago                                                             k8s_php-redis.406c1646_frontend2-phomo_default_7c3bc0ec-1700-11e5-bbc4-005056b462d8_66a07d2f                           
a0828ebd1424        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend2-g0b5x_default_7c4affa6-1700-11e5-bbc4-005056b462d8_4ed343d8                                 
34f88178f812        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago                                                             k8s_php-redis.406c1646_frontend1.11.11-o64ha_default_7aa914bd-1700-11e5-bbc4-005056b462d8_ed59ff7b                     
675ff1bc9874        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago                                                             k8s_php-redis.406c1646_frontend1.11.11-m90st_default_7aaa6160-1700-11e5-bbc4-005056b462d8_cc3df47b                     
960eb976f699        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend2-phomo_default_7c3bc0ec-1700-11e5-bbc4-005056b462d8_a499b54b                                 
0d69c7ba1746        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend1.11.11-o64ha_default_7aa914bd-1700-11e5-bbc4-005056b462d8_ee66382d                           
74242b609cd2        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend1.11.11-m90st_default_7aaa6160-1700-11e5-bbc4-005056b462d8_6ad1a950                           
d6db1e21bd0e        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago                                                             k8s_php-redis.406c1646_frontend2-skzkr_default_60b56ee5-1700-11e5-bbc4-005056b462d8_3e709dc3                           
efab6cd76f1e        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend2-skzkr_default_60b56ee5-1700-11e5-bbc4-005056b462d8_421e0263                                 
de5c65a6d56a        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago         Exited (137) 7 weeks ago                            k8s_php-redis.406c1646_frontend2-05zzs_default_56aea9cb-1700-11e5-bbc4-005056b462d8_6c2aa19c                           
7a2eaffb65fc        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend2-05zzs_default_56aea9cb-1700-11e5-bbc4-005056b462d8_f0ae6639                                 
316eb5ef5112        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago         Exited (137) 7 weeks ago                            k8s_php-redis.406c1646_frontend1.11.11-o4loc_default_53b89715-1700-11e5-bbc4-005056b462d8_1b89f736                     
fe49dc0d98ad        gcr.io/google_containers/pause:0.8.0        "/pause"               7 weeks ago         Exited (0) 7 weeks ago                              k8s_POD.3f830436_frontend1.11.11-o4loc_default_53b89715-1700-11e5-bbc4-005056b462d8_96aabde1                           
b3145d2d2e12        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago                                                             k8s_php-redis.406c1646_frontend1.1-wii8j_default_51253f1d-1700-11e5-bbc4-005056b462d8_6b595f97                         
87d82260121e        kubernetes/example-guestbook-php-redis:v2   "/bin/sh -c /run.sh"   7 weeks ago                                                             k8s_php-redis.406c1646_frontend1.11.11-89lm7_default_516961a1-1700-11e5-bbc4-005056b462d8_b597a08e                     
...

And NO ERROR has been reported.

ENV

ubuntu 14.04

$ docker version
Client version: 1.7.1
Client API version: 1.19
Go version (client): go1.4.2
Git commit (client): 786b29d
OS/Arch (client): linux/amd64
Server version: 1.7.1
Server API version: 1.19
Go version (server): go1.4.2
Git commit (server): 786b29d
OS/Arch (server): linux/amd64

[dalanlan]

I didnt build my own image and used spotify/docker-gc for simplicity. Just in case.

[dalanlan]

Run the binary one -- got the same result.
It turns out that containers.reap is totally empty after executing the script, while containers.reap.tmp is just right.
Turns out when we didnt set a /etc/docker-gc-exclude-containers, it would leave all of the containers as not-to-be-deleted.

[dalanlan]

See #44 instead.
Closing it.