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Jérome Perrin
slapos.toolbox
Commits
d2312c15
Commit
d2312c15
authored
Aug 13, 2012
by
Antoine Catton
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Add shellinabox process management.
parent
560f5b94
Changes
2
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Showing
2 changed files
with
148 additions
and
29 deletions
+148
-29
slapos/container/__init__.py
slapos/container/__init__.py
+28
-2
slapos/container/process.py
slapos/container/process.py
+120
-27
No files found.
slapos/container/__init__.py
View file @
d2312c15
...
...
@@ -2,6 +2,7 @@
import
ConfigParser
import
argparse
import
gdbm
import
sys
import
os
...
...
@@ -13,13 +14,33 @@ def main():
parser
=
argparse
.
ArgumentParser
(
description
=
"Slapcontainer binary"
)
parser
.
add_argument
(
'configuration_file'
,
type
=
str
,
help
=
"SlapOS configuration file."
)
parser
.
add_argument
(
'database'
,
type
=
str
,
help
=
'slapcontainer database'
)
log_lvls
=
[
lvl
for
lvl
in
logging
.
_levelNames
.
keys
()
if
isinstance
(
lvl
,
basestring
)]
parser
.
add_argument
(
'--log'
,
nargs
=
1
,
default
=
[
'INFO'
],
choices
=
log_lvls
,
metavar
=
'lvl'
)
metavar
=
'lvl'
,
help
=
'Log level'
)
parser
.
add_argument
(
'--pid'
,
nargs
=
1
,
help
=
'pid file path'
)
args
=
parser
.
parse_args
()
if
args
.
pid
is
not
None
:
pid_filename
=
args
.
pid
[
0
]
if
os
.
path
.
exists
(
pid_filename
):
print
>>
sys
.
stderr
,
"Already running"
return
127
with
open
(
pid_filename
,
'w'
)
as
pid_file
:
pid_file
.
write
(
str
(
os
.
getpid
()))
try
:
run
(
args
)
finally
:
os
.
remove
(
pid_filename
)
else
:
run
(
args
)
def
run
(
args
):
slapos_conf
=
ConfigParser
.
ConfigParser
()
slapos_conf
.
read
(
args
.
configuration_file
)
...
...
@@ -36,4 +57,9 @@ def main():
logging
.
basicConfig
(
level
=
logging
.
getLevelName
(
args
.
log
[
0
]))
process
.
main
(
sr_directory
,
partition_list
)
database
=
gdbm
.
open
(
args
.
database
,
'c'
,
0600
)
try
:
process
.
main
(
sr_directory
,
partition_list
,
database
)
finally
:
database
.
sync
()
database
.
close
()
slapos/container/process.py
View file @
d2312c15
...
...
@@ -3,6 +3,7 @@
import
os
import
subprocess
import
logging
import
signal
class
SlapContainerError
(
Exception
):
"""This exception is thrown, if there is
...
...
@@ -11,11 +12,14 @@ class SlapContainerError(Exception):
def
main
(
sr_directory
,
partition_list
):
def
main
(
sr_directory
,
partition_list
,
database
):
logger
=
logging
.
getLogger
(
'process'
)
to_start
=
set
()
######################
# Process partitions #
######################
start_requested
=
set
()
logger
.
debug
(
'Processing partitions...'
)
for
partition_path
in
partition_list
:
partition_logger
=
logger
.
getChild
(
...
...
@@ -37,17 +41,25 @@ def main(sr_directory, partition_list):
with
open
(
lxc_conf_path
,
'r'
)
as
lxc_conf_file
:
requested_status
=
lxc_conf_file
.
readline
().
strip
(
'
\
n
\
r
\
t
#'
)
if
requested_status
==
'started'
:
start_requested
.
add
(
name
)
current_status
=
status
(
sr_directory
,
partition_path
,
name
)
to_start
.
add
(
name
)
process_partition
(
requested_status
=
requested_status
,
sr_directory
=
sr_directory
,
partition_path
=
partition_path
,
name
=
name
,
database
=
database
,
logger
=
partition_logger
,
lxc_conf_filename
=
lxc_conf_path
)
if
requested_status
!=
current_status
:
start
(
sr_directory
,
partition_path
,
name
,
lxc_conf_path
)
if
start_requested
:
logger
.
debug
(
'Container which start was requested : %s.'
,
', '
.
join
(
start_requested
))
logger
.
debug
(
'Container to start %s.'
,
', '
.
join
(
to_start
))
####################################
# Stop unwanted running containers #
####################################
try
:
active_containers
=
set
(
call
(
[
os
.
path
.
join
(
sr_directory
,
'parts/lxc/bin/lxc-ls'
),
...
...
@@ -57,9 +69,12 @@ def main(sr_directory, partition_list):
except
SlapContainerError
:
active_containers
=
set
()
to_stop
=
active_containers
-
to_start
### Stop containers
to_stop
=
active_containers
-
start_requested
if
to_stop
:
logger
.
debug
(
'Stopping containers %s.'
,
', '
.
join
(
to_stop
))
else
:
logger
.
debug
(
'No extra containers to stop.'
)
for
container
in
to_stop
:
try
:
...
...
@@ -72,26 +87,91 @@ def main(sr_directory, partition_list):
except
SlapContainerError
:
logger
.
fatal
(
'Impossible to stop %s.'
,
container
)
### Stop shellinaboxes
active_shellinabox
=
set
(
database
.
keys
())
to_stop
=
active_shellinabox
-
start_requested
if
to_stop
:
logger
.
debug
(
'Stopping shellinaboxes %s.'
,
', '
.
join
(
to_stop
))
else
:
logger
.
debug
(
'No extra shellinabox to stop.'
)
for
shellinabox
in
to_stop
:
pid
=
int
(
database
[
shellinabox
])
try
:
os
.
kill
(
pid
,
signal
.
SIGTERM
)
except
OSError
:
# Shellinabox's already stopped
del
database
[
shellinabox
]
else
:
# Stopping shellinabox
if
not
is_pid_running
(
pid
):
del
database
[
shellinabox
]
def
start
(
sr_directory
,
partition_path
,
name
,
lxc_conf_path
):
lxc_start
=
os
.
path
.
join
(
sr_directory
,
'parts/lxc/bin/lxc-start'
)
call
([
lxc_start
,
'-f'
,
lxc_conf_path
,
'-n'
,
name
,
'-d'
])
def
status
(
sr_directory
,
partition_path
,
name
):
logger
=
logging
.
getLogger
(
'status'
)
logger
.
debug
(
'Check status of %s'
,
name
)
def
process_partition
(
requested_status
,
sr_directory
,
partition_path
,
name
,
database
,
logger
,
lxc_conf_filename
):
if
requested_status
==
'started'
:
##############################
# Stateless container launch #
##############################
logger
.
debug
(
'Check status.'
)
lxc_info
=
call
([
os
.
path
.
join
(
sr_directory
,
'parts/lxc/bin/lxc-info'
),
'-n'
,
name
])
### Check if container is launched
if
'RUNNING'
in
lxc_info
:
return
'started'
current_status
=
'started'
else
:
return
'stopped'
current_status
=
'stopped'
### If container is not launch, launch it
if
requested_status
!=
current_status
:
logger
.
debug
(
'Start lxc.'
)
lxc_start
=
os
.
path
.
join
(
sr_directory
,
'parts/lxc/bin/lxc-start'
)
call
([
lxc_start
,
'-f'
,
lxc_conf_filename
,
'-n'
,
name
,
'-d'
])
################################
# Stateless shellinabox launch #
################################
current_status
=
'stopped'
# Check if shellinabox is started
if
name
in
database
:
pid
=
int
(
database
[
name
])
if
is_pid_running
(
pid
):
current_status
=
'started'
if
current_status
==
'stopped'
:
logger
.
debug
(
'Start shellinabox.'
)
shellinabox_pid
=
call_daemonize
([
os
.
path
.
join
(
partition_path
,
'bin/shellinaboxd'
)])
database
[
name
]
=
str
(
shellinabox_pid
)
def
is_pid_running
(
pid
):
logger
=
logging
.
getLogger
(
'pid'
)
logger
.
debug
(
'Check if pid %d is running.'
,
pid
)
# XXX: Magic number 0 for no special signal
try
:
os
.
kill
(
pid
,
0
)
logger
.
debug
(
'%d is running.'
,
pid
)
return
True
except
OSError
:
# Process doesn't exists
logger
.
debug
(
'%d is not running.'
,
pid
)
return
False
def
call
(
command_line
,
override_environ
=
{}):
logger
=
logging
.
getLogger
(
'commandline'
)
...
...
@@ -111,3 +191,16 @@ def call(command_line, override_environ={}):
out
=
process
.
stdout
.
read
()
logger
.
debug
(
'Output : %s.'
,
out
)
return
out
def
call_daemonize
(
command_line
,
override_environ
=
{}):
logger
=
logging
.
getLogger
(
'daemon'
)
environ
=
dict
(
os
.
environ
)
environ
.
update
(
override_environ
)
daemon
=
subprocess
.
Popen
(
command_line
,
env
=
environ
)
logger
.
debug
(
'Daemonize as pid %d : %s'
,
daemon
.
pid
,
' '
.
join
(
command_line
))
return
daemon
.
pid
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