cubic 0.18.0

Cubic is a lightweight command line manager for virtual machines. It has a simple, daemon-less and rootless design. All Cubic virtual machines run isolated in the user context. Cubic is built on top of QEMU, KVM and cloud-init. https://cubic-vm.org https://github.com/cubic-vm/cubic Show all supported images: $ cubic images Create a new virtual machine instance: $ cubic create mymachine --image ubuntu:noble List all virtual machine instances: $ cubic instances Start an instance: $ cubic start <instance name> Stop an instance: $ cubic stop <instance name> Open a shell in the instance: $ cubic ssh <machine name> Copy a file from the host to the instance: $ cubic scp <path/to/host/file> <machine>:<path/to/guest/file> Copy a file from the instance to the hots: $ cubic scp <machine>:<path/to/guest/file> <path/to/host/file> 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

use crate::commands::Command;
use crate::env::Environment;
use crate::error::Error;
use crate::image::ImageStore;
use crate::instance::InstanceStore;
use crate::view::{Alignment, Console, TableView};
use clap::Parser;

/// List all virtual machine instances
#[derive(Parser)]
pub struct ListInstanceCommand;

impl Command for ListInstanceCommand {
    fn run(
        &self,
        console: &mut dyn Console,
        _env: &Environment,
        _image_store: &dyn ImageStore,
        instance_store: &dyn InstanceStore,
    ) -> Result<(), Error> {
        let instance_names = instance_store.get_instances();

        let mut view = TableView::new();
        view.add_row()
            .add("PID", Alignment::Left)
            .add("Name", Alignment::Left)
            .add("Arch", Alignment::Left)
            .add("CPUs", Alignment::Right)
            .add("Memory", Alignment::Right)
            .add("Disk Used", Alignment::Right)
            .add("Disk Total", Alignment::Right)
            .add("State", Alignment::Left);

        for instance_name in &instance_names {
            let instance = instance_store.load(instance_name)?;
            let pid = instance_store
                .get_pid(&instance)
                .map(|pid| pid.to_string())
                .unwrap_or_default();

            view.add_row()
                .add(&pid, Alignment::Left)
                .add(instance_name, Alignment::Left)
                .add(&instance.arch.to_string(), Alignment::Left)
                .add(&instance.cpus.to_string(), Alignment::Right)
                .add(&instance.mem.to_size(), Alignment::Right)
                .add(
                    &instance
                        .disk_used
                        .as_ref()
                        .map(|size| size.to_size())
                        .unwrap_or("n/a".to_string()),
                    Alignment::Right,
                )
                .add(&instance.disk_capacity.to_size(), Alignment::Right)
                .add(
                    if instance_store.is_running(&instance) {
                        "running"
                    } else {
                        "stopped"
                    },
                    Alignment::Left,
                );
        }
        view.print(console);
        Result::Ok(())
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::arch::Arch;
    use crate::image::image_store_mock::tests::ImageStoreMock;
    use crate::instance::Instance;
    use crate::instance::instance_store_mock::tests::InstanceStoreMock;
    use crate::model::DataSize;
    use crate::view::console_mock::tests::ConsoleMock;

    #[test]
    fn test_list_instance_command() {
        let console = &mut ConsoleMock::new();
        let image_store = &ImageStoreMock::default();
        let env = &Environment::new(String::new(), String::new(), String::new());
        let instance_store = &InstanceStoreMock::new(vec![
            Instance {
                name: "test".to_string(),
                arch: Arch::AMD64,
                user: "cubic".to_string(),
                cpus: 1,
                mem: DataSize::new(1024),
                disk_capacity: DataSize::new(1048576),
                ssh_port: 9000,
                hostfwd: Vec::new(),
                ..Instance::default()
            },
            Instance {
                name: "test2".to_string(),
                arch: Arch::AMD64,
                user: "cubic".to_string(),
                cpus: 5,
                mem: DataSize::new(0),
                disk_capacity: DataSize::new(5000),
                ssh_port: 9000,
                hostfwd: Vec::new(),
                ..Instance::default()
            },
        ]);

        ListInstanceCommand {}
            .run(console, env, image_store, instance_store)
            .unwrap();

        assert_eq!(
            console.get_output(),
            "\
PID   Name    Arch    CPUs    Memory   Disk Used   Disk Total   State
      test    amd64      1   1.0 KiB         n/a      1.0 MiB   stopped
      test2   amd64      5     0   B         n/a      4.9 KiB   stopped
"
        );
    }

    #[test]
    fn test_list_instance_command_empty() {
        let console = &mut ConsoleMock::new();
        let instance_store = &InstanceStoreMock::new(Vec::new());
        let image_store = &ImageStoreMock::default();
        let env = &Environment::new(String::new(), String::new(), String::new());

        ListInstanceCommand {}
            .run(console, env, image_store, instance_store)
            .unwrap();

        assert_eq!(
            console.get_output(),
            "PID   Name   Arch   CPUs   Memory   Disk Used   Disk Total   State\n"
        );
    }
}