Q: I am using a virtual machine based on LXD ("Linux Container"). How do I automatically launch the LXD container when I start it on a Linux system?
When LXD runs at startup, you can start the container at any time. You need to set boot.autostart to true. You can use the boot.autostart.priority (default is 0) option to define the order in which the containers are started (starting from the highest). You can also use the boot.autostart.delay (default 0) option to define another container to start after waiting a few seconds after starting a container.
grammar
The keywords discussed above can be set using the lxc tool with the following syntax:
$ lxc config set{vm-name}{key}{value}
$ lxc config set{vm-name} boot.autostart {true|false}
$ lxc config set{vm-name} boot.autostart.priority integer
$ lxc config set{vm-name} boot.autostart.delay integer
How do I get the LXD container to start at startup in Ubuntu Linux 16.10?
Enter the following command:
$ lxc config set{vm-name} boot.autostart true
Set an LXD container name "nginx-vm" to start at startup
$ lxc config set nginx-vm boot.autostart true
You can verify the settings with the following syntax:
$ lxc config get{vm-name} boot.autostart
$ lxc config get nginx-vm boot.autostart
Sample output:
True
You can use the following syntax to start another container after waiting 10 seconds after starting the container:
$ lxc config set nginx-vm boot.autostart.delay 10
Finally, define the order in which the containers are started by setting the highest value. Make sure the dbvm container is started first, then start nginxvm.
$ lxc config set db_vm boot.autostart.priority 100
$ lxc config set nginx_vm boot.autostart.priority 99
View all [1] configuration values ​​on Linux using the bash loop below:
#!/bin/bash
Echo'The current values ​​of each vm boot parameters:'
For c in db_vm nginx_vm memcache_vm
Do
Echo"*** VM: $c ***"
For v in boot.autostart boot.autostart.priority boot.autostart.delay
Do
Echo"Key: $v => $(lxc config get $c $v) "
Done
Echo""
Done
Sample output:
Fig.01: Get autostarting LXD containers values ​​using a bash shell script
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