[libvirt] [sandbox PATCH] allow to use a templated unit in virt-sandbox
This permit to create a templated unit inside the sandbox,
using the sandbox name as a variable and so running the same
unit with a different configuration without too much hassle.
For example, someone could have several different configuration of
website in /etc/nginx/websites.d/ and have each of them started in
a different sandbox, with a sample templated unit using the sandbox
name as a option to read the proper configuration file directly.
---
bin/virt-sandbox-service | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/bin/virt-sandbox-service b/bin/virt-sandbox-service
index 2096be1..0d89b54 100755
--- a/bin/virt-sandbox-service
+++ b/bin/virt-sandbox-service
@@ -345,6 +345,10 @@ class GenericContainer(Container):
def set_command(self, command):
self.config.set_command(command)
+
+def is_template_unit(unit):
+ return '@' in unit
+
class SystemdContainer(Container):
IGNORE_DIRS = [ "/var/run/", "/etc/logrotate.d/",
"/etc/pam.d" ]
DEFAULT_DIRS = [ "/etc", "/var" ]
@@ -624,14 +628,22 @@ WantedBy=%(TARGET)s
source = "%s%s" % ( self.dest, d)
self.add_bind_mount(source, d)
+ def get_expanded_unit_template(self, unit):
+ return unit.replace('@', '@' + self.name)
+
def create_container_unit(self, src, dest, unit):
- fd = open(dest + "/" + unit, "w")
- fd.write(""".include %s
+ if is_template_unit(unit):
+ expanded_unit_name = self.get_expanded_unit_template(unit)
+ os.symlink(src, dest + "/" + expanded_unit_name)
+ shutil.copy(src, dest + "/" + unit)
+ else:
+ fd = open(dest + "/" + unit, "w")
+ fd.write(""".include %s
[Service]
PrivateTmp=false
PrivateNetwork=false
""" % src )
- fd.close()
+ fd.close()
def gen_content(self):
if self.copy:
@@ -677,6 +689,8 @@ PrivateNetwork=false
for i, src in self.unit_file_list:
self.create_container_unit(src, self.dest + unitdir, i)
+ if is_template_unit(i):
+ i = self.get_expanded_unit_template(i)
os.symlink("../" + i, self.dest + tgtdir + "/" + i)
tgtfile = unitdir + "/multi-user.target"
--
1.8.2.1