Golang HostConfig.CapDrop方法代码示例

// modifyHostConfig applies security context config to dockercontainer.HostConfig.
func modifyHostConfig(sc *runtimeapi.LinuxContainerSecurityContext, hostConfig *dockercontainer.HostConfig) {
	if sc == nil {
		return
	}

	// Apply supplemental groups.
	for _, group := range sc.SupplementalGroups {
		hostConfig.GroupAdd = append(hostConfig.GroupAdd, strconv.FormatInt(group, 10))
	}

	// Apply security context for the container.
	if sc.Privileged != nil {
		hostConfig.Privileged = sc.GetPrivileged()
	}
	if sc.ReadonlyRootfs != nil {
		hostConfig.ReadonlyRootfs = sc.GetReadonlyRootfs()
	}
	if sc.Capabilities != nil {
		hostConfig.CapAdd = sc.GetCapabilities().GetAddCapabilities()
		hostConfig.CapDrop = sc.GetCapabilities().GetDropCapabilities()
	}
	if sc.SelinuxOptions != nil {
		hostConfig.SecurityOpt = securitycontext.ModifySecurityOptions(
			hostConfig.SecurityOpt,
			&v1.SELinuxOptions{
				User:  sc.SelinuxOptions.GetUser(),
				Role:  sc.SelinuxOptions.GetRole(),
				Type:  sc.SelinuxOptions.GetType(),
				Level: sc.SelinuxOptions.GetLevel(),
			},
		)
	}
}

// ModifyHostConfig is called before the Docker runContainer call. The
// security context provider can make changes to the HostConfig, affecting
// security options, whether the container is privileged, volume binds, etc.
func (p SimpleSecurityContextProvider) ModifyHostConfig(pod *api.Pod, container *api.Container, hostConfig *dockercontainer.HostConfig, supplementalGids []int64) {
	// Apply supplemental groups
	if container.Name != leaky.PodInfraContainerName {
		// TODO: We skip application of supplemental groups to the
		// infra container to work around a runc issue which
		// requires containers to have the '/etc/group'. For
		// more information see:
		// https://github.com/opencontainers/runc/pull/313
		// This can be removed once the fix makes it into the
		// required version of docker.
		if pod.Spec.SecurityContext != nil {
			for _, group := range pod.Spec.SecurityContext.SupplementalGroups {
				hostConfig.GroupAdd = append(hostConfig.GroupAdd, strconv.Itoa(int(group)))
			}
			if pod.Spec.SecurityContext.FSGroup != nil {
				hostConfig.GroupAdd = append(hostConfig.GroupAdd, strconv.Itoa(int(*pod.Spec.SecurityContext.FSGroup)))
			}
		}

		for _, group := range supplementalGids {
			hostConfig.GroupAdd = append(hostConfig.GroupAdd, strconv.Itoa(int(group)))
		}
	}

	// Apply effective security context for container
	effectiveSC := DetermineEffectiveSecurityContext(pod, container)
	if effectiveSC == nil {
		return
	}

	if effectiveSC.Privileged != nil {
		hostConfig.Privileged = *effectiveSC.Privileged
	}

	if effectiveSC.Capabilities != nil {
		add, drop := MakeCapabilities(effectiveSC.Capabilities.Add, effectiveSC.Capabilities.Drop)
		hostConfig.CapAdd = add
		hostConfig.CapDrop = drop
	}

	if effectiveSC.SELinuxOptions != nil {
		hostConfig.SecurityOpt = modifySecurityOption(hostConfig.SecurityOpt, dockerLabelUser, effectiveSC.SELinuxOptions.User)
		hostConfig.SecurityOpt = modifySecurityOption(hostConfig.SecurityOpt, dockerLabelRole, effectiveSC.SELinuxOptions.Role)
		hostConfig.SecurityOpt = modifySecurityOption(hostConfig.SecurityOpt, dockerLabelType, effectiveSC.SELinuxOptions.Type)
		hostConfig.SecurityOpt = modifySecurityOption(hostConfig.SecurityOpt, dockerLabelLevel, effectiveSC.SELinuxOptions.Level)
	}
}