3a7b9ce173
If /sys/kernel/mm/transparent_hugepage/enabled=always, the shim process
will use huge pages, which will consume a lot of memory.
Just like this:
ps -efo pid,rss,comm | grep shim
PID RSS COMMAND
2614 7464 containerd-shim
I don't think shim needs to use huge pages, and if we turn off the huge
pages option, we can save a lot of memory resources.
After we set THP_DISABLE=true:
ps -efo pid,comm,rss
PID COMMAND RSS
1629841 containerd-shim 5648
containerd
|
|--shim1 --start
|
|--shim2 (this shim will on host)
|
|--runc create (when containerd send create request by ttrpc)
|
|--runc init (this is the pid 1 in container)
we should set thp_disabled=1 in shim1 --start, because if we set this
in shim 2, the huge page has been setted while func main() running,
we set thp_disabled cannot change the setted huge pages.
So We need to set thp_disabled=1 in shim1 so that shim2 inherits the
settings of the parent process shim1, and shim2 has closed the
hugepage when it starts.
For runc processes, we need to set thp_disabled='before' in shim2 after
fork() and before execve(). So we use cmd.pre_exec to do this.
|
||
|---|---|---|
| .. | ||
| src | ||
| Cargo.toml | ||
| README.md | ||
README.md
Rust bindings for runc CLI
A crate for consuming the runc binary in your Rust applications, similar to go-runc for Go. This crate is based on archived rust-runc.
Usage
Both sync/async version is available.
You can build runc client with RuncConfig in method chaining style.
Call build() or build_async() to get client.
Note that async client depends on tokio, then please use it on tokio runtime.
#[tokio::main]
async fn main() {
let config = runc::GlobalOpts::new()
.root("./new_root")
.debug(false)
.log("/path/to/logfile.json")
.log_format(runc::LogFormat::Json)
.rootless(true);
let client = config.build_async().unwrap();
let opts = runc::options::CreateOpts::new()
.pid_file("/path/to/pid/file")
.no_pivot(true);
client.create("container-id", "path/to/bundle", Some(&opts)).unwrap();
}
Limitations
- Supported commands are only:
- create
- start
- state
- kill
- delete
- Exec is not available in
RuncAsyncClientnow. - Console utilites are not available
- see Go version