Optimizing Docker Images

Lightnting talk presented at the Tokyo Docker Meetup #5 http://eventdots.jp/event/567049

Transcript

1. Allan Espinosa OPTIMIZING DOCKER IMAGES allan.espinosa@outlook.com
2. ABOUT ME  aespinosa.github.io  @AllanEspinosa  aespinosa Docker High Performance 
3. AGENDA Why Optimize Caching deployments Lean Docker images Caching Docker builds Conclusion
4. UNOPTIMIZED CONTAINERS Slow deployment time Slow image build time Cancels out Docker's advantages
5. SLOW DEPLOYMENT TIME Downloading images Large images
6. SMALL DOCKER IMAGES Static binaries Dynamic binaries
7. DYNAMIC BINARIES F R O M g o l a n g : 1 . 4 . 2 A D D h e l l o . g o h e l l o . g o R U N g o b u i l d h e l l o . g o E X P O S E 8 0 8 0 E N T R Y P O I N T [ " . / h e l l o " ]
8. Mostly golang:1.4.2 R E P O S I T O R Y T A G . . . V I R T U A L S I Z E l a r g e a p p l a t e s t . . . 5 2 3 . 1 M B g o l a n g 1 . 4 . 2 . . . 5 1 7 . 3 M B
9. Done! (for static binaries) d o c k e r h o s t $ d o c k e r r u n - n a m e b u i l t a p p - d l a r g e a p p d o c k e r h o s t $ d o c k e r c p b u i l t a p p : / h e l l o . / h e l l o F R O M s c r a t c h A D D h e l l o / a p p / h e l l o E X P O S E 8 0 8 0 E N T R Y P O I N T [ " / a p p / h e l l o " ]
10. But on dynamic binaries d o c k e r h o s t $ d o c k e r e x e c - i t b u i l t a p p / u s r / b i n / l d d h e l l o l i n u x - v d s o . s o . 1 ( 0 x 0 0 0 0 7 f f d 8 4 7 4 7 0 0 0 ) l i b p t h r e a d . s o . 0 = > / l i b / x 8 6 _ 6 4 - l i n u x - g n u / l i b p t h r e a d . s o . 0 ( 0 x 0 0 0 0 7 f 3 2 f l i b c . s o . 6 = > / l i b / x 8 6 _ 6 4 - l i n u x - g n u / l i b c . s o . 6 ( 0 x 0 0 0 0 7 f 3 2 f 3 3 e a 0 0 0 ) / l i b 6 4 / l d - l i n u x - x 8 6 - 6 4 . s o . 2 ( 0 x 0 0 0 0 7 f 3 2 f 3 9 b 0 0 0 0 )
11. Copy them off as well! d o c k e r h o s t $ d o c k e r c p b u i l t a p p : / l i b / x 8 6 _ 6 4 - l i n u x - g n u / l i b p t h r e a d . s o . 0 . / d o c k e r h o s t $ d o c k e r c p b u i l t a p p : / l i b / x 8 6 _ 6 4 - l i n u x - g n u / l i b c . s o . 6 . / d o c k e r h o s t $ d o c k e r c p b u i l t a p p : / l i b 6 4 / l d - l i n u x - x 8 6 - 6 4 . s o . 2 . /
12. F R O M s c r a t c h A D D h e l l o / a p p / h e l l o A D D l i b p t h r e a d - 2 . 1 9 . s o / l i b / x 8 6 _ 6 4 - l i n u x - g n u / l i b p t h r e a d . s o . 0 A D D l i b c - 2 . 1 9 . s o / l i b / x 8 6 _ 6 4 - l i n u x - g n u / l i b c . s o . 6 A D D l d - 2 . 1 9 . s o / l i b 6 4 / l d - l i n u x - x 8 6 - 6 4 . s o . 2 E X P O S E 8 0 8 0 E N T R Y P O I N T [ " / a p p / h e l l o " ]
13. New size of binary image R E P O S I T O R Y T A G . . . V I R T U A L S I Z E b i n a r y l a t e s t . . . 7 . 8 5 3 M B l a r g e a p p l a t e s t . . . 5 2 3 . 1 M B g o l a n g 1 . 4 . 2 . . . 5 1 7 . 3 M B
14. FAST BUILDS Caching proxies Rearrange Dockerfiles
15. F R O M r u b y : 2 . 2 . 2 A D D . / a p p W O R K D I R / a p p R U N b u n d l e i n s t a l l E X P O S E 9 2 9 2 C M D r a c k u p - E n o n e
16. bundle install takes forever!!! . . . S t e p 3 : R U N b u n d l e i n s t a l l - - - > R u n n i n g i n 7 0 2 5 d e 4 0 c 0 1 d D o n ' t r u n B u n d l e r a s r o o t . B u n d l e r c a n a s k f o r s u d o i f i t i s n e e d e d , a n d i n s t a l l i n g y o u r b u n d l e a s r o o t w i l l b r e a k t h i s a p p l i c a t i o n f o r a l l n o n - r o o t u s e r s o n t h i s m a c h i n e . F e t c h i n g g e m m e t a d a t a f r o m h t t p s : / / r u b y g e m s . o r g / . . . . . . . . . F e t c h i n g v e r s i o n m e t a d a t a f r o m h t t p s : / / r u b y g e m s . o r g / . . R e s o l v i n g d e p e n d e n c i e s . . . I n s t a l l i n g m i n i _ p o r t i l e 0 . 6 . 2 I n s t a l l i n g n o k o g i r i 1 . 6 . 6 . 2 w i t h n a t i v e e x t e n s i o n s I n s t a l l i n g r a c k 1 . 6 . 4 U s i n g b u n d l e r 1 . 1 0 . 5 B u n d l e c o m p l e t e ! 2 G e m f i l e d e p e n d e n c i e s , 4 g e m s n o w i n s t a l l e d . B u n d l e d g e m s a r e i n s t a l l e d i n t o / u s r / l o c a l / b u n d l e . - - - > a b 2 6 8 1 8 c c d 8 5 . . .
17. Only run it once F R O M r u b y : 2 . 2 . 2 A D D G e m f i l e / a p p / G e m f i l e W O R K D I R / a p p R U N b u n d l e i n s t a l l A D D . / a p p E X P O S E 9 2 9 2 C M D r a c k u p - E n o n e
18. . . . S t e p 3 : R U N b u n d l e i n s t a l l - - - > U s i n g c a c h e - - - > 5 c 0 0 9 e d 0 3 9 3 4 . . .
19. SUMMARY Docker helps you deploy and run apps fast. Keep it that way.
20. QUESTIONS?  @AllanEspinosa