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|
{
lib,
writeText,
runCommand,
writeClosure,
}:
{
buildContainer =
{
args,
mounts ? { },
os ? "linux",
arch ? "x86_64",
readonly ? false,
}:
let
sysMounts = {
"/proc" = {
type = "proc";
source = "proc";
};
"/dev" = {
type = "tmpfs";
source = "tmpfs";
options = [
"nosuid"
"strictatime"
"mode=755"
"size=65536k"
];
};
"/dev/pts" = {
type = "devpts";
source = "devpts";
options = [
"nosuid"
"noexec"
"newinstance"
"ptmxmode=0666"
"mode=755"
"gid=5"
];
};
"/dev/shm" = {
type = "tmpfs";
source = "shm";
options = [
"nosuid"
"noexec"
"nodev"
"mode=1777"
"size=65536k"
];
};
"/dev/mqueue" = {
type = "mqueue";
source = "mqueue";
options = [
"nosuid"
"noexec"
"nodev"
];
};
"/sys" = {
type = "sysfs";
source = "sysfs";
options = [
"nosuid"
"noexec"
"nodev"
"ro"
];
};
"/sys/fs/cgroup" = {
type = "cgroup";
source = "cgroup";
options = [
"nosuid"
"noexec"
"nodev"
"relatime"
"ro"
];
};
};
config = writeText "config.json" (
builtins.toJSON {
ociVersion = "1.0.0";
platform = {
inherit os arch;
};
linux = {
namespaces = map (type: { inherit type; }) [
"pid"
"network"
"mount"
"ipc"
"uts"
];
};
root = {
path = "rootfs";
inherit readonly;
};
process = {
inherit args;
user = {
uid = 0;
gid = 0;
};
cwd = "/";
};
mounts = lib.mapAttrsToList (
destination:
{
type,
source,
options ? null,
}:
{
inherit
destination
type
source
options
;
}
) sysMounts;
}
);
in
runCommand "join" { } ''
set -o pipefail
mkdir -p $out/rootfs/{dev,proc,sys}
cp ${config} $out/config.json
xargs tar c < ${writeClosure args} | tar -xC $out/rootfs/
'';
}
|
