From e0628b7349150e8774a91d495f1203e601450aa9 Mon Sep 17 00:00:00 2001 From: xiadanni1 Date: Tue, 20 Aug 2019 09:10:09 +0800 Subject: [PATCH] runc: print files limit and usage when exec failed reason: print files limit and usage when exec failed Change-Id: Id5a910f360345b70c29152133991807c233c9872 Signed-off-by: xiadanni --- libcontainer/container_linux.go | 1 + libcontainer/standard_init_linux.go | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/libcontainer/container_linux.go b/libcontainer/container_linux.go index 914da7f..3ee7d5f 100644 --- a/libcontainer/container_linux.go +++ b/libcontainer/container_linux.go @@ -310,6 +310,7 @@ func (c *linuxContainer) start(process *Process) error { return newSystemErrorWithCause(err, "creating new parent process") } if err := parent.start(); err != nil { + printFilesInfo(c.id) // terminate the process to ensure that it properly is reaped. if err := parent.terminate(); err != nil { logrus.Warn(err) diff --git a/libcontainer/standard_init_linux.go b/libcontainer/standard_init_linux.go index b25669f..ac6b3bf 100644 --- a/libcontainer/standard_init_linux.go +++ b/libcontainer/standard_init_linux.go @@ -215,6 +215,7 @@ func (l *linuxStandardInit) Init() error { syscall.Close(l.stateDirFD) if err := syscall.Exec(name, l.config.Args[0:], os.Environ()); err != nil { printMemoryInfo() + printFilesInfo("") return newSystemErrorWithCause(err, "exec user process") } return nil @@ -235,3 +236,13 @@ func printMemoryInfo() { logrus.Infof("print memory info (cgroup memory.stat): %s", string(output)) } } + +func printFilesInfo(id string) { + if id != "" { + id = "docker/" + id + "/" + } + output, err := ioutil.ReadFile("/sys/fs/cgroup/files/" + id + "files.limit") + logrus.Errorf("cgroup files.limit: %s, err: %v", string(output), err) + output, err = ioutil.ReadFile("/sys/fs/cgroup/files/" + id + "files.usage") + logrus.Errorf("cgroup files.usage: %s, err: %v", string(output), err) +} -- 1.8.3.1