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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
use std::{
fs::{self, File},
io,
path::{Path, PathBuf},
process,
};
use nix::{
mount::{self, MsFlags},
sched::{self, CloneFlags},
unistd,
};
use serde::{Deserialize, Serialize};
use sha2::Digest;
use tee_readwrite::TeeWriter;
use crate::{
types::*,
unshare,
util::{self, tar, ToIOResult},
};
use super::spec;
#[derive(Debug, Deserialize, Serialize)]
pub enum Error {
Code(i32),
String(String),
}
impl From<io::Error> for Error {
fn from(error: io::Error) -> Self {
match error.raw_os_error() {
Some(code) => Error::Code(code),
None => Error::String(error.to_string()),
}
}
}
impl From<Error> for io::Error {
fn from(error: Error) -> Self {
match error {
Error::Code(code) => io::Error::from_raw_os_error(code),
Error::String(string) => io::Error::new(io::ErrorKind::Other, string),
}
}
}
fn init_task() -> Result<(), Error> {
sched::unshare(CloneFlags::CLONE_NEWNS).to_io_result()?;
mount::mount::<_, _, _, str>(
Some("runc"),
"build/tmp/runc",
Some("tmpfs"),
MsFlags::empty(),
None,
)
.to_io_result()?;
let mut dir = fs::DirBuilder::new();
dir.recursive(true);
let workdir = "build/tmp/runc/workdir";
dir.create(workdir)?;
unistd::chown(workdir, Some(unshare::BUILD_UID), Some(unshare::BUILD_GID)).to_io_result()?;
let sysroot = "build/tmp/runc/depends/opt/sysroot";
dir.create(sysroot)?;
Ok(())
}
fn tmp_filename(task: &Task) -> PathBuf {
Path::new("build/state/tmp/output").join(format!("{}.tar", task.input_hash()))
}
fn output_filename(hash: &OutputHash) -> PathBuf {
Path::new("build/state/output").join(format!("{}.tar", hash))
}
fn unpack_dependencies(task: &Task) -> Result<(), Error> {
for dep in task.depends.values() {
let filename = output_filename(dep);
let file = File::open(filename)?;
tar::unpack_filter(file, "build/tmp/runc/depends", |entry| {
let path = match entry.path() {
Ok(path) => path,
Err(_) => return false,
};
path.starts_with("opt/sysroot")
})?;
}
Ok(())
}
fn collect_output(task: Task) -> Result<OutputHash, io::Error> {
let filename = tmp_filename(&task);
let file = util::unix::create_as(
&filename,
Some(unshare::BUILD_UID),
Some(unshare::BUILD_GID),
)?;
let hasher = OutputHasher::new();
let writer = TeeWriter::new(file, hasher);
let writer = util::tar::pack(
writer,
"build/tmp/runc/workdir/dest",
["opt/sysroot"].iter(),
)?;
let (file, hasher) = writer.into_inner();
file.sync_all()?;
drop(file);
let hash = StringHash(hasher.finalize().into());
fs::rename(filename, output_filename(&hash))?;
Ok(hash)
}
pub fn handle_task(task: Task) -> Result<OutputHash, Error> {
init_task()?;
unpack_dependencies(&task)?;
spec::generate_spec(task.def.run.as_str(), &task.env)
.save("build/tmp/runc/config.json")
.expect("Saving runtime spec failed");
let output = process::Command::new("runc")
.arg("--root")
.arg("build/tmp/runc/state")
.arg("run")
.arg("rebel")
.current_dir("build/tmp/runc")
.output()?;
if !output.status.success() {
println!(
"{}:\n{}",
task.id,
String::from_utf8_lossy(output.stderr.as_slice()),
);
return Err(Error::String("Task failed".to_string()));
}
println!(
"{}:\n{}",
task.id,
String::from_utf8_lossy(output.stdout.as_slice()),
);
Ok(collect_output(task)?)
}
|
