From 864592c74635aa91cef2e12224589b6446f9bb2d Mon Sep 17 00:00:00 2001 From: Matthew Heon Date: Mon, 4 Jan 2021 15:29:18 -0500 Subject: Add default sysctls for pod infra containers Ensure that infra containers for pods will grab default sysctls from containers.conf, to match how other containers are created. This mostly affects the other containers in the pod, which will inherit those sysctls when they join the pod's namespaces. Signed-off-by: Matthew Heon --- libpod/runtime_pod_infra_linux.go | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'libpod') diff --git a/libpod/runtime_pod_infra_linux.go b/libpod/runtime_pod_infra_linux.go index 3e4185db1..dd957527d 100644 --- a/libpod/runtime_pod_infra_linux.go +++ b/libpod/runtime_pod_infra_linux.go @@ -159,6 +159,34 @@ func (r *Runtime) makeInfraContainer(ctx context.Context, p *Pod, imgName, rawIm g.AddMount(devPts) } + // Add default sysctls from containers.conf + defaultSysctls, err := util.ValidateSysctls(r.config.Sysctls()) + if err != nil { + return nil, err + } + for sysctlKey, sysctlVal := range defaultSysctls { + // Ignore mqueue sysctls if not sharing IPC + if !p.config.UsePodIPC && strings.HasPrefix(sysctlKey, "fs.mqueue.") { + logrus.Infof("Sysctl %s=%s ignored in containers.conf, since IPC Namespace for pod is unused", sysctlKey, sysctlVal) + + continue + } + + // Ignore net sysctls if host network or not sharing network + if (p.config.InfraContainer.HostNetwork || !p.config.UsePodNet) && strings.HasPrefix(sysctlKey, "net.") { + logrus.Infof("Sysctl %s=%s ignored in containers.conf, since Network Namespace for pod is unused", sysctlKey, sysctlVal) + continue + } + + // Ignore uts sysctls if not sharing UTS + if !p.config.UsePodUTS && (strings.HasPrefix(sysctlKey, "kernel.domainname") || strings.HasPrefix(sysctlKey, "kernel.hostname")) { + logrus.Infof("Sysctl %s=%s ignored in containers.conf, since UTS Namespace for pod is unused", sysctlKey, sysctlVal) + continue + } + + g.AddLinuxSysctl(sysctlKey, sysctlVal) + } + containerName := p.ID()[:IDTruncLength] + "-infra" options = append(options, r.WithPod(p)) options = append(options, WithRootFSFromImage(imgID, imgName, rawImageName)) -- cgit v1.2.3-54-g00ecf