debug-log: added new debug log api and command

provider/local/environ.go

 // Copyright 2013 Canonical Ltd.
 // Licensed under the AGPLv3, see LICENCE file for details.
 
 package local
 
 import (
         "fmt"
         "net"
         "os"
         "os/exec"
@@ skipping 156 matching lines @@
         }
         // don't write proxy settings for local machine
         mcfg.AptProxySettings = osenv.ProxySettings{}
         mcfg.ProxySettings = osenv.ProxySettings{}
         cloudcfg := coreCloudinit.New()
         // Since rsyslogd is restricted by apparmor to only write to /var/log/**
         // we now provide a symlink to the written file in the local log dir.
         // Also, we leave the old all-machines.log file in
         // /var/log/juju-{{namespace}} until we start the environment again. So
         // potentially remove it at the start of the cloud-init.
-        logfile := fmt.Sprintf("/var/log/juju-%s/all-machines.log", env.config.namespace())
+        logLocation := fmt.Sprintf("/var/log/juju-%s/all-machines.log", env.config.namespace())
+        mcfg.Config, err = mcfg.Config.Apply(map[string]interface{}{"log-location": logLocation})
+        if err != nil {
+                return err
+        }
         cloudcfg.AddScripts(
-                fmt.Sprintf("[ -f %s ] && rm %s", logfile, logfile),
-                fmt.Sprintf("ln -s %s %s/", logfile, env.config.logDir()))
+                fmt.Sprintf("[ -f %s ] && rm %s", logLocation, logLocation),
+                fmt.Sprintf("ln -s %s %s/", logLocation, env.config.logDir()))
+
         if err := cloudinit.ConfigureJuju(mcfg, cloudcfg); err != nil {
                 return err
         }
         return finishBootstrap(mcfg, cloudcfg, ctx)
 }
 
 // finishBootstrap converts the machine config to cloud-config,
 // converts that to a script, and then executes it locally.
 //
 // mcfg is supplied for testing purposes.
@@ skipping 242 matching lines @@
 
 // Ports is specified in the Environ interface.
 func (env *localEnviron) Ports() ([]instance.Port, error) {
         return nil, nil
 }
 
 // Provider is specified in the Environ interface.
 func (env *localEnviron) Provider() environs.EnvironProvider {
         return providerInstance
 }