1. dotCloud and go
Una Breve Introduzione a DotCloud
1

2. L’immancabile esempio
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3. 3

4. 4

5. 5

6. 6

7. 7

8. 8

9. 9

10. dove lo metto?
10

11. COME lo metto?
11

12. QUANTO TEMPO
CI METTO?
12

13. dotCloud
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14. 14

15. IaaS - PaaS - SaaS
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16. IaaS - PaaS - SaaS
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17. 16

18. 17

19. 18

20. 19

21. dotcloud
20

22. easy_install
21

23. Easy Install è un modulo
python (easy_install)
incluso in setuptools che
vi consente di scaricare ed
installare automaticamente
pacchetti Python.
22

24. Easy Install è un modulo
python (easy_install)
incluso in setuptools che
vi consente di scaricare ed
installare automaticamente
pacchetti Python.
23

25. Sì, Python
24

26. (è il motivo per cui
queste slide sono nere)
25

27. 26
(-:

28. Python 2.7
27

29. 28
)-:

30. $ dotcloud create whatever
Created application "whatever"
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31. 30

32. $ cat dotcloud.yml
www:
type: perl
approot: www
backend:
type: perl-worker
approot: backend
nosqldb:
type: redis
sqldb:
type: mysql
31

33. $ cat dotcloud.yml
www:
type: perl
approot: www
backend:
type: perl-worker
approot: backend
nosqldb:
type: redis
sqldb:
type: mysql
32

34. $ cat dotcloud.yml
www:
type: perl
approot: www
backend:
type: perl-worker
approot: backend
nosqldb:
type: redis
sqldb:
type: mysql
33

35. type: perl
34

36. $ cat app.psgi
#!/usr/bin/env perl
use Dancer;
use whatever;
dance();
35

37. $ cat Makefile.PL
...
PREREQ_PM => {
'Test::More' => 0,
'YAML' => 0,
'Dancer' => 1.3070,
'Plack::Request' => 0,
'Template' => 0,
'JSON' => 0,
'Redis' => 0,
...
},
...
36

38. type: perl-worker
37

39. $ cat supervisord.conf
[program:exporter]
command = perl /home/dotcloud/current/bin/exporter
[program:saver]
command = perl /home/dotcloud/current/bin/saver
38

40. $ cat supervisord.conf
[program:exporter]
command = perl /home/dotcloud/current/bin/exporter
[program:saver]
command = perl /home/dotcloud/current/bin/saver
39

41. $ cat supervisord.conf
[program:exporter]
command = perl /home/dotcloud/current/bin/exporter
[program:saver]
command = perl /home/dotcloud/current/bin/saver
40

42. $ cat dotcloud.yml
www:
type: perl
approot: www
backend:
type: perl-worker
approot: backend
nosqldb:
type: redis
sqldb:
type: mysql
41

43. Connettersi
42

44. 43

45. $ cat /home/dotcloud/environment.yml
DOTCLOUD_ENVIRONMENT: default
DOTCLOUD_NOSQLDB_REDIS_HOST: whatever-polettix.dotcloud.com
DOTCLOUD_NOSQLDB_REDIS_LOGIN: redis
DOTCLOUD_NOSQLDB_REDIS_PASSWORD: ...
DOTCLOUD_NOSQLDB_REDIS_PORT: '13749'
DOTCLOUD_NOSQLDB_REDIS_URL: ...
DOTCLOUD_PROJECT: whatever
DOTCLOUD_SERVICE_ID: 0
DOTCLOUD_SERVICE_NAME: www
DOTCLOUD_SQLDB_MYSQL_HOST: whatever-polettix.dotcloud.com
DOTCLOUD_SQLDB_MYSQL_LOGIN: root
DOTCLOUD_SQLDB_MYSQL_PASSWORD: ...
DOTCLOUD_SQLDB_MYSQL_PORT: '13747'
DOTCLOUD_SQLDB_MYSQL_URL: ...
44

46. use JSON qw< from_json >;
use File::Slurp qw< read_file >;
sub get_dotcloud_config {
my $filename = shift || '/home/dotcloud/environment.json';
my $config_text = read_file($filename);
my $config = from_json($config_text);
return $config;
} ## end sub get_dotcloud_config
45

47. sub get_redis {
my $config = get_dotcloud_config();
my ($password, $hostname, $port) = map {
$config->{'DOTCLOUD_NOSQLDB_REDIS_' . $_}
} qw< PASSWORD HOST PORT >;
require Redis;
my $redis = Redis->new(server => "$hostname:$port");
$redis->auth($password);
return $redis;
}
46

48. ROTFL
sub get_redis {
my $config = get_dotcloud_config();
my ($password, $hostname, $port) = map {
$config->{'DOTCLOUD_NOSQLDB_REDIS_' . $_}
} qw< PASSWORD HOST PORT >;
require Redis;
my $redis = Redis->new(server => "$hostname:$port");
$redis->auth($password);
return $redis;
}
47

49. (mi basta poco)
48

50. sub get_dbh {
my $config = get_dotcloud_config();
my ($username, $password, $hostname, $port) = map {
$config->{'DOTCLOUD_SQLDB_MYSQL_' . $_}
} qw< LOGIN PASSWORD HOST PORT >;
require DBI;
my $dbh = DBI->connect(
"dbi:mysql:host=$hostname;port=$port"
. ";database=whatever",
$username, $password,
{ RaiseError => 1},
);
return $dbh;
}
49

51. 50

52. 51

53. use lib '/home/dotcloud/code/lib';
52

54. DotCloud::Environment
53

55. 54

56. ora... in produzione
55

57. $ dotcloud push whatever
# Found dotcloud.yml: Using /home/poletti/sviluppo/
perl/whatever as a base directory
# upload /home/poletti/sviluppo/perl/whatever ssh://
dotcloud@uploader.dotcloud.com:443/whatever/
branch:master
# git
...
2011-08-27 09:00:16 [api] Deploy whatever scheduled
for revision=latest
2011-08-27 09:00:16 [api] Waiting for the build. (It
may take a few minutes)
2011-08-27 09:00:17 [api] All the services are ready.
Beginning the build.
...
56

58. uso git
57

59. potete usare mercurial
58

60. oppure niente
59

61. io uso git
60

62. fatto
61

63. $ dotcloud list whatever
whatever:
- www (type: perl; instances: 1)
- nosqldb (type: redis; instances: 1)
- sqldb (type: mysql; instances: 1)
- backend (type: perl-worker; instances: 1)
$ dotcloud url whatever
www: http://www.whatever.dotcloud.com/
62

64. 63

65. $ dotcloud info whatever.backend
build_revision: git-b2f52d5
cluster: wolverine
config: {}
created_at: 1313990084.301964
image_version: b81a3f3949a8 (latest)
ports:
- name: ssh
url: ssh://dotcloud@whatever-polettix.dotcloud.com:13750
state: running
type: perl-worker
64

66. telecomando:
dotcloud run
65

67. type: mysql
$ dotcloud info whatever.sqldb
cluster: wolverine
config:
mysql_password: <the-password>
created_at: 1313990083.324873
...
$ dotcloud run whatever.sqldb --
mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ;
or g.
...
mysql> CREATE TABLE weight (...
66

68. troubleshooting?
67

69. dotcloud logs
(Luke!)
68

70. $ dotcloud logs whatever.backend
# tail -F /var/log/supervisor/*.log
==> /var/log/supervisor/exporter-stderr---supervisor-2y6P9O.log <==
[2011/08/27 01:35:25 INFO ] serving pending requests if needed...
[2011/08/27 01:35:25 INFO ] waiting for more export requests...
[2011/08/27 01:39:20 INFO ] serving pending requests if needed...
[2011/08/27 01:39:20 INFO ] waiting for more export requests...
[2011/08/27 01:39:42 INFO ] got element to export: {"email":"flavio@polettix.it","username":"silvia"}
[2011/08/27 01:42:18 INFO ] serving pending requests if needed...
[2011/08/27 01:42:18 INFO ] waiting for more export requests...
[2011/08/27 01:42:30 INFO ] got element to export: {"email":"flavio@polettix.it","username":"silvia"}
[2011/08/27 09:00:24 INFO ] serving pending requests if needed...
[2011/08/27 09:00:24 INFO ] waiting for more export requests...
==> /var/log/supervisor/exporter-stdout---supervisor-foI5vi.log <==
==> /var/log/supervisor/saver-stderr---supervisor-pt1_hK.log <==
[2011/08/27 01:35:25 INFO ] waiting for more data...
[2011/08/27 01:36:04 INFO ] got element to save: {"epoch":1313913600,"weight":83200,"username":"flavio"}
[2011/08/27 01:37:25 INFO ] got element to save: {"epoch":1313827200,"weight":62000,"username":"silvia"}
[2011/08/27 01:39:20 INFO ] performing initial transfer if needed...
[2011/08/27 01:39:20 INFO ] waiting for more data...
[2011/08/27 01:42:18 INFO ] performing initial transfer if needed...
[2011/08/27 01:42:18 INFO ] waiting for more data...
[2011/08/27 01:44:04 INFO ] got element to save: {"epoch":1313913600,"weight":78000,"username":"whatever"}
[2011/08/27 09:00:24 INFO ] performing initial transfer if needed...
[2011/08/27 09:00:24 INFO ] waiting for more data...
==> /var/log/supervisor/saver-stdout---supervisor-iQDgpA.log <==
==> /var/log/supervisor/supervisord.log <==
2011-08-27 01:42:18,703 INFO spawned: 'saver' with pid 19587
2011-08-27 01:42:18,713 INFO spawned: 'exporter' with pid 19588
2011-08-27 01:42:19,914 INFO success: saver entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2011-08-27 01:42:19,943 INFO success: exporter entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2011-08-27 09:00:22,067 INFO stopped: saver (terminated by SIGTERM)
2011-08-27 09:00:22,070 INFO stopped: exporter (terminated by SIGTERM)
2011-08-27 09:00:24,079 INFO spawned: 'saver' with pid 19729
2011-08-27 09:00:24,086 INFO spawned: 'exporter' with pid 19730
2011-08-27 09:00:25,426 INFO success: saver entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2011-08-27 09:00:25,426 INFO success: exporter entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
69

71. PIÙ troubleshooting?
70

72. dotcloud run
(like hell)
71

73. $ dotcloud run whatever.www -- ps afx
# ps afx
PID TTY STAT TIME COMMAND
3558 ? S 0:00 sshd: dotcloud@pts/0
3559 pts/0 Rs+ 0:00 _ ps afx
144 ? Ss 0:44 /usr/bin/python /usr/
3495 ? S 0:00 _ /usr/local/bin/uwsg
3496 ? S 0:00 _ /usr/local/bin/
72

74. ANCORA PIÙ
troubleshooting?
73

75. dotcloud ssh
74

76. dotcloud ssh
(no root, sorry!)
75

77. $ dotcloud ssh whatever.backend
# $SHELL
dotcloud@whatever-default-backend-0:~$
$ dotcloud ssh whatever.nosqldb
# $SHELL
redis@whatever-default-nosqldb-0:~$ redis-cli
redis> auth ...
OK
redis> smembers users
1) "silvia"
2) "flavio"
3) "whatever"
76

78. 77

79. $ git commit
78

80. OPPURE
79

81. $ dotcloud push --all whatever
80

82. $ dotcloud push whatever -b branch
81

83. 82

84. 83

85. È tutto molto triste
84

86. 85

87. Account Multipli:
https://github.com/polettix/dotmulti
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88. 87