2. Docker
is
an
open-‐source
project
to
easily
create
lightweight,
portable,
self-‐sufficient
containers
from
any
applicaHon.
2
3. The
same
container
that
a
developer
builds
and
tests
on
a
laptop
can
run
at
scale,
in
producHon,
on
VMs,
bare
metal,
OpenStack
clusters,
public
clouds
and
more.
3
12. Here's
a
typical
Docker
build
process
(Dockerfile)
from
ubuntu:12.10
run
apt-‐get
update
run
DEBIAN_FRONTEND=noninteractive
apt-‐get
install
-‐q
-‐y
python
run
DEBIAN_FRONTEND=noninteractive
apt-‐get
install
-‐q
-‐y
python-‐pip
run
pip
install
django
run
DEBIAN_FRONTEND=noninteractive
apt-‐get
install
-‐q
-‐y
curl
run
curl
-‐L
https://github.com/shykes/helloflask/master.tar.gz
|
tar
-‐xzv
run
cd
helloflask-‐master
&&
pip
install
-‐r
requirements.txt
12
13. Under
the
hood
★ GO
★ The
cgroup
and
namespacing
capabiliHes
of
the
Linux
kernel
13
14. Under
the
hood
★ GO
★ The
cgroup
and
namespacing
capabiliHes
of
the
Linux
kernel
★ AUFS,
a
powerful
union
filesystem
with
copy-‐on-‐write
capabiliHes
14
15. Under
the
hood
★ GO
★ The
cgroup
and
namespacing
capabiliHes
of
the
Linux
kernel
★ AUFS,
a
powerful
union
filesystem
with
copy-‐on-‐write
capabiliHes
★ lxc,
a
set
of
convenience
scripts
to
simplify
the
creaHon
of
Linux
containers
15
17. App
running
in
prod
hNp://praguejs.cz
!
vagrant@precise64:~$
docker
ps
!
CONTAINER
ID
IMAGE
!
b2332dffe
registry.abtris.cz:5000/praguejs:latest
-‐
Build
local
>
docker
build
-‐t=praguejs
.
-‐
Test
local
>
docker
run
-‐p
49200:3333
praguejs
hNp://localhost:49200
-‐
Change
some
files
-‐
Rebuild
&
test
>
docker
build
-‐t
praguejs
>
docker
run
-‐p
49200:3333
praguejs
17
18. Push
to
producHon
•
Tag
image
in
order
to
push
it
>
docker
tag
praguejs
registry.abtris.cz:5000/praguejs
•
Push
image
to
local
registry
>
docker
push
registry.abtris.cz:5000/praguejs
•
On
producHon
server,
pull
image
>
docker
pull
registry.abtris.cz:5000/praguejs
•
Start
new
container
>
docker
run
-‐d
-‐p
127.0.0.1::3333
<image>
vagrant@precise64:~$
docker
ps
• Change
configuraHon
at
nginx/haproxy
and
restart
CONTAINER
ID
IMAGE
b2332dffe
registry.abtris.cz:5000/praguejs:latest
• See
changes
live
d45222331
1b4f43asds
18
