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Diffstat (limited to 'libpod/oci_conmon_linux.go')
-rw-r--r--libpod/oci_conmon_linux.go76
1 files changed, 47 insertions, 29 deletions
diff --git a/libpod/oci_conmon_linux.go b/libpod/oci_conmon_linux.go
index c20e3f0b4..da4b85067 100644
--- a/libpod/oci_conmon_linux.go
+++ b/libpod/oci_conmon_linux.go
@@ -5,7 +5,6 @@ package libpod
import (
"bufio"
"bytes"
- "encoding/binary"
"fmt"
"io"
"io/ioutil"
@@ -61,6 +60,7 @@ type ConmonOCIRuntime struct {
noPivot bool
reservePorts bool
supportsJSON bool
+ supportsKVM bool
supportsNoCgroups bool
sdNotify bool
}
@@ -71,11 +71,25 @@ type ConmonOCIRuntime struct {
// The first path that points to a valid executable will be used.
// Deliberately private. Someone should not be able to construct this outside of
// libpod.
-func newConmonOCIRuntime(name string, paths []string, conmonPath string, runtimeCfg *config.Config, supportsJSON, supportsNoCgroups bool) (OCIRuntime, error) {
+func newConmonOCIRuntime(name string, paths []string, conmonPath string, runtimeCfg *config.Config) (OCIRuntime, error) {
if name == "" {
return nil, errors.Wrapf(define.ErrInvalidArg, "the OCI runtime must be provided a non-empty name")
}
+ // Make lookup tables for runtime support
+ supportsJSON := make(map[string]bool, len(runtimeCfg.Engine.RuntimeSupportsJSON))
+ supportsNoCgroups := make(map[string]bool, len(runtimeCfg.Engine.RuntimeSupportsNoCgroups))
+ supportsKVM := make(map[string]bool, len(runtimeCfg.Engine.RuntimeSupportsKVM))
+ for _, r := range runtimeCfg.Engine.RuntimeSupportsJSON {
+ supportsJSON[r] = true
+ }
+ for _, r := range runtimeCfg.Engine.RuntimeSupportsNoCgroups {
+ supportsNoCgroups[r] = true
+ }
+ for _, r := range runtimeCfg.Engine.RuntimeSupportsKVM {
+ supportsKVM[r] = true
+ }
+
runtime := new(ConmonOCIRuntime)
runtime.name = name
runtime.conmonPath = conmonPath
@@ -90,8 +104,9 @@ func newConmonOCIRuntime(name string, paths []string, conmonPath string, runtime
// TODO: probe OCI runtime for feature and enable automatically if
// available.
- runtime.supportsJSON = supportsJSON
- runtime.supportsNoCgroups = supportsNoCgroups
+ runtime.supportsJSON = supportsJSON[name]
+ runtime.supportsNoCgroups = supportsNoCgroups[name]
+ runtime.supportsKVM = supportsKVM[name]
foundPath := false
for _, path := range paths {
@@ -480,8 +495,7 @@ func (r *ConmonOCIRuntime) UnpauseContainer(ctr *Container) error {
}
// HTTPAttach performs an attach for the HTTP API.
-// This will consume, and automatically close, the hijacked HTTP session.
-// It is not necessary to close it independently.
+// The caller must handle closing the HTTP connection after this returns.
// The cancel channel is not closed; it is up to the caller to do so after
// this function returns.
// If this is a container with a terminal, we will stream raw. If it is not, we
@@ -492,13 +506,7 @@ func (r *ConmonOCIRuntime) HTTPAttach(ctr *Container, httpConn net.Conn, httpBuf
isTerminal = ctr.config.Spec.Process.Terminal
}
- // Ensure that our contract of closing the HTTP connection is honored.
- defer hijackWriteErrorAndClose(deferredErr, ctr.ID(), httpConn, httpBuf)
-
if streams != nil {
- if isTerminal {
- return errors.Wrapf(define.ErrInvalidArg, "cannot specify which streams to attach as container %s has a terminal", ctr.ID())
- }
if !streams.Stdin && !streams.Stdout && !streams.Stderr {
return errors.Wrapf(define.ErrInvalidArg, "must specify at least one stream to attach to")
}
@@ -547,8 +555,16 @@ func (r *ConmonOCIRuntime) HTTPAttach(ctr *Container, httpConn net.Conn, httpBuf
go func() {
var err error
if isTerminal {
+ // Hack: return immediately if attachStdout not set to
+ // emulate Docker.
+ // Basically, when terminal is set, STDERR goes nowhere.
+ // Everything does over STDOUT.
+ // Therefore, if not attaching STDOUT - we'll never copy
+ // anything from here.
logrus.Debugf("Performing terminal HTTP attach for container %s", ctr.ID())
- err = httpAttachTerminalCopy(conn, httpBuf, ctr.ID())
+ if attachStdout {
+ err = httpAttachTerminalCopy(conn, httpBuf, ctr.ID())
+ }
} else {
logrus.Debugf("Performing non-terminal HTTP attach for container %s", ctr.ID())
err = httpAttachNonTerminalCopy(conn, httpBuf, ctr.ID(), attachStdin, attachStdout, attachStderr)
@@ -971,6 +987,12 @@ func (r *ConmonOCIRuntime) SupportsNoCgroups() bool {
return r.supportsNoCgroups
}
+// SupportsKVM checks if the OCI runtime supports running containers
+// without KVM separation
+func (r *ConmonOCIRuntime) SupportsKVM() bool {
+ return r.supportsKVM
+}
+
// AttachSocketPath is the path to a single container's attach socket.
func (r *ConmonOCIRuntime) AttachSocketPath(ctr *Container) (string, error) {
if ctr == nil {
@@ -1405,9 +1427,9 @@ func (r *ConmonOCIRuntime) sharedConmonArgs(ctr *Container, cuuid, bundlePath, p
var logDriver string
switch ctr.LogDriver() {
- case JournaldLogging:
- logDriver = JournaldLogging
- case JSONLogging:
+ case define.JournaldLogging:
+ logDriver = define.JournaldLogging
+ case define.JSONLogging:
fallthrough
default: //nolint-stylecheck
// No case here should happen except JSONLogging, but keep this here in case the options are extended
@@ -1417,8 +1439,8 @@ func (r *ConmonOCIRuntime) sharedConmonArgs(ctr *Container, cuuid, bundlePath, p
// to get here, either a user would specify `--log-driver ""`, or this came from another place in libpod
// since the former case is obscure, and the latter case isn't an error, let's silently fallthrough
fallthrough
- case KubernetesLogging:
- logDriver = fmt.Sprintf("%s:%s", KubernetesLogging, logPath)
+ case define.KubernetesLogging:
+ logDriver = fmt.Sprintf("%s:%s", define.KubernetesLogging, logPath)
}
args = append(args, "-l", logDriver)
@@ -1725,13 +1747,16 @@ func httpAttachNonTerminalCopy(container *net.UnixConn, http *bufio.ReadWriter,
for {
numR, err := container.Read(buf)
if numR > 0 {
- headerBuf := []byte{0, 0, 0, 0}
+ var headerBuf []byte
+ // Subtract 1 because we strip the first byte (used for
+ // multiplexing by Conmon).
+ headerLen := uint32(numR - 1)
// Practically speaking, we could make this buf[0] - 1,
// but we need to validate it anyways...
switch buf[0] {
case AttachPipeStdin:
- headerBuf[0] = 0
+ headerBuf = makeHTTPAttachHeader(0, headerLen)
if !stdin {
continue
}
@@ -1739,24 +1764,17 @@ func httpAttachNonTerminalCopy(container *net.UnixConn, http *bufio.ReadWriter,
if !stdout {
continue
}
- headerBuf[0] = 1
+ headerBuf = makeHTTPAttachHeader(1, headerLen)
case AttachPipeStderr:
if !stderr {
continue
}
- headerBuf[0] = 2
+ headerBuf = makeHTTPAttachHeader(2, headerLen)
default:
logrus.Errorf("Received unexpected attach type %+d, discarding %d bytes", buf[0], numR)
continue
}
- // Get big-endian length and append.
- // Subtract 1 because we strip the first byte (used for
- // multiplexing by Conmon).
- lenBuf := []byte{0, 0, 0, 0}
- binary.BigEndian.PutUint32(lenBuf, uint32(numR-1))
- headerBuf = append(headerBuf, lenBuf...)
-
numH, err2 := http.Write(headerBuf)
if err2 != nil {
if err != nil {
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-01-12 12:16:30 +0000