8e53465842
this adds a `platform` interface for shim service to manage platform-specific behaviors such as I/O (which uses epoll in linux to work around bugs with applications that closes all consoles i.e. https://github.com/opencontainers/runc/pull/1434 and https://github.com/moby/moby/issues/27202) Its expected that we only have 1 epollfd per containerd_shim to manage all processes. Since all the work are done outside of the container runtime, upgrading of runc is not required and should be done separately. Signed-off-by: Daniel Dao <dqminh89@gmail.com>
59 lines
1.1 KiB
Go
59 lines
1.1 KiB
Go
// +build !windows,!linux
|
|
|
|
package shim
|
|
|
|
import (
|
|
"io"
|
|
"sync"
|
|
"syscall"
|
|
|
|
"github.com/containerd/console"
|
|
"github.com/containerd/fifo"
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
type unixPlatform struct {
|
|
}
|
|
|
|
func (p *unixPlatform) copyConsole(ctx context.Context, console console.Console, stdin, stdout, stderr string, wg, cwg *sync.WaitGroup) (console.Console, error) {
|
|
if stdin != "" {
|
|
in, err := fifo.OpenFifo(ctx, stdin, syscall.O_RDONLY, 0)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
cwg.Add(1)
|
|
go func() {
|
|
cwg.Done()
|
|
io.Copy(console, in)
|
|
}()
|
|
}
|
|
outw, err := fifo.OpenFifo(ctx, stdout, syscall.O_WRONLY, 0)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
outr, err := fifo.OpenFifo(ctx, stdout, syscall.O_RDONLY, 0)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
wg.Add(1)
|
|
cwg.Add(1)
|
|
go func() {
|
|
cwg.Done()
|
|
io.Copy(outw, console)
|
|
console.Close()
|
|
outr.Close()
|
|
outw.Close()
|
|
wg.Done()
|
|
}()
|
|
return console, nil
|
|
}
|
|
|
|
func (p *unixPlatform) shutdownConsole(ctx context.Context, cons console.Console) error {
|
|
return nil
|
|
}
|
|
|
|
func (s *Service) initPlatform() error {
|
|
s.platform = &unixPlatform{}
|
|
return nil
|
|
}
|