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libpod: do not call (*container).Config()

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Access the container's config field directly inside of libpod instead of
calling `Config()` which in turn creates expensive JSON deep copies.

Accessing the field directly drops memory consumption of a simple
`podman run --rm busybox true` from 1245kB to 410kB.

[NO TESTS NEEDED]

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
This commit is contained in:
Valentin Rothberg
2021-09-28 17:01:22 +02:00
parent 381ab48c25
commit 5d6ea90e75
8 changed files with 36 additions and 39 deletions
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2
libpod/container_copy_linux.go
View File

@ -174,7 +174,7 @@ func (c *Container) copyToArchive(ctx context.Context, path string, writer io.Wr
// getContainerUser returns the specs.User and ID mappings of the container.
func getContainerUser(container *Container, mountPoint string) (specs.User, error) {
userspec := container.Config().User
userspec := container.config.User
uid, gid, _, err := chrootuser.GetUser(mountPoint, userspec)
u := specs.User{

7
libpod/container_internal.go
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@ -923,12 +923,11 @@ func (c *Container) checkDependenciesRunning() ([]string, error) {
}
// Check the status
conf := depCtr.Config()
state, err := depCtr.State()
if err != nil {
return nil, errors.Wrapf(err, "error retrieving state of dependency %s of container %s", dep, c.ID())
}
if state != define.ContainerStateRunning && !conf.IsInfra {
if state != define.ContainerStateRunning && !depCtr.config.IsInfra {
notRunning = append(notRunning, dep)
}
depCtrs[dep] = depCtr
@ -1003,7 +1002,7 @@ func (c *Container) cniHosts() string {
for _, status := range c.getNetworkStatus() {
for _, netInt := range status.Interfaces {
for _, netAddress := range netInt.Networks {
hosts += fmt.Sprintf("%s\t%s %s\n", netAddress.Subnet.IP.String(), c.Hostname(), c.Config().Name)
hosts += fmt.Sprintf("%s\t%s %s\n", netAddress.Subnet.IP.String(), c.Hostname(), c.config.Name)
}
}
}
@ -2106,7 +2105,7 @@ func (c *Container) canWithPrevious() error {
// JSON files for later export
func (c *Container) prepareCheckpointExport() error {
// save live config
if _, err := metadata.WriteJSONFile(c.Config(), c.bundlePath(), metadata.ConfigDumpFile); err != nil {
if _, err := metadata.WriteJSONFile(c.config, c.bundlePath(), metadata.ConfigDumpFile); err != nil {
return err
}

8
libpod/container_path_resolution.go
View File

@ -112,7 +112,7 @@ func (c *Container) resolvePath(mountPoint string, containerPath string) (string
func findVolume(c *Container, containerPath string) (*Volume, error) {
runtime := c.Runtime()
cleanedContainerPath := filepath.Clean(containerPath)
for _, vol := range c.Config().NamedVolumes {
for _, vol := range c.config.NamedVolumes {
if cleanedContainerPath == filepath.Clean(vol.Dest) {
return runtime.GetVolume(vol.Name)
}
@ -124,7 +124,7 @@ func findVolume(c *Container, containerPath string) (*Volume, error) {
// Volume's destination.
func isPathOnVolume(c *Container, containerPath string) bool {
cleanedContainerPath := filepath.Clean(containerPath)
for _, vol := range c.Config().NamedVolumes {
for _, vol := range c.config.NamedVolumes {
if cleanedContainerPath == filepath.Clean(vol.Dest) {
return true
}
@ -141,7 +141,7 @@ func isPathOnVolume(c *Container, containerPath string) bool {
// path of a Mount. Returns a matching Mount or nil.
func findBindMount(c *Container, containerPath string) *specs.Mount {
cleanedPath := filepath.Clean(containerPath)
for _, m := range c.Config().Spec.Mounts {
for _, m := range c.config.Spec.Mounts {
if m.Type != "bind" {
continue
}
@ -157,7 +157,7 @@ func findBindMount(c *Container, containerPath string) *specs.Mount {
// Mount's destination.
func isPathOnBindMount(c *Container, containerPath string) bool {
cleanedContainerPath := filepath.Clean(containerPath)
for _, m := range c.Config().Spec.Mounts {
for _, m := range c.config.Spec.Mounts {
if cleanedContainerPath == filepath.Clean(m.Destination) {
return true
}

2
libpod/kube.go
View File

@ -90,7 +90,7 @@ func (p *Pod) GenerateForKube(ctx context.Context) (*v1.Pod, []v1.ServicePort, e
// so set it at here
for _, ctr := range allContainers {
if !ctr.IsInfra() {
switch ctr.Config().RestartPolicy {
switch ctr.config.RestartPolicy {
case define.RestartPolicyAlways:
pod.Spec.RestartPolicy = v1.RestartPolicyAlways
case define.RestartPolicyOnFailure:

2
libpod/networking_slirp4netns.go
View File

@ -222,7 +222,7 @@ func (r *Runtime) setupSlirp4netns(ctr *Container) error {
defer errorhandling.CloseQuiet(syncR)
defer errorhandling.CloseQuiet(syncW)
havePortMapping := len(ctr.Config().PortMappings) > 0
havePortMapping := len(ctr.config.PortMappings) > 0
logPath := filepath.Join(ctr.runtime.config.Engine.TmpDir, fmt.Sprintf("slirp4netns-%s.log", ctr.config.ID))
ctrNetworkSlipOpts := []string{}

2
libpod/oci_conmon_linux.go
View File

@ -1150,7 +1150,7 @@ func (r *ConmonOCIRuntime) createOCIContainer(ctr *Container, restoreOptions *Co
if ctr.config.NetMode.IsSlirp4netns() || rootless.IsRootless() {
if ctr.config.PostConfigureNetNS {
havePortMapping := len(ctr.Config().PortMappings) > 0
havePortMapping := len(ctr.config.PortMappings) > 0
if havePortMapping {
ctr.rootlessPortSyncR, ctr.rootlessPortSyncW, err = os.Pipe()
if err != nil {

6
libpod/pod.go
View File

@ -164,8 +164,7 @@ func (p *Pod) PidMode() string {
if err != nil {
return ""
}
conf := infra.Config()
ctrSpec := conf.Spec
ctrSpec := infra.config.Spec
if ctrSpec != nil && ctrSpec.Linux != nil {
for _, ns := range ctrSpec.Linux.Namespaces {
if ns.Type == specs.PIDNamespace {
@ -186,8 +185,7 @@ func (p *Pod) UserNSMode() string {
if err != nil {
return ""
}
conf := infra.Config()
ctrSpec := conf.Spec
ctrSpec := infra.config.Spec
if ctrSpec != nil && ctrSpec.Linux != nil {
for _, ns := range ctrSpec.Linux.Namespaces {
if ns.Type == specs.UserNamespace {

46
libpod/pod_api.go
View File

@ -34,7 +34,7 @@ func (p *Pod) startInitContainers(ctx context.Context) error {
}
// If the container is a once init container, we need to remove it
// after it runs
if initCon.Config().InitContainerType == define.OneShotInitContainer {
if initCon.config.InitContainerType == define.OneShotInitContainer {
icLock := initCon.lock
icLock.Lock()
if err := p.runtime.removeContainer(ctx, initCon, false, false, true); err != nil {
@ -590,16 +590,16 @@ func (p *Pod) Inspect() (*define.InspectPodData, error) {
return nil, err
}
infraConfig = new(define.InspectPodInfraConfig)
infraConfig.HostNetwork = !infra.Config().ContainerNetworkConfig.UseImageHosts
infraConfig.StaticIP = infra.Config().ContainerNetworkConfig.StaticIP
infraConfig.NoManageResolvConf = infra.Config().UseImageResolvConf
infraConfig.NoManageHosts = infra.Config().UseImageHosts
infraConfig.HostNetwork = !infra.config.ContainerNetworkConfig.UseImageHosts
infraConfig.StaticIP = infra.config.ContainerNetworkConfig.StaticIP
infraConfig.NoManageResolvConf = infra.config.UseImageResolvConf
infraConfig.NoManageHosts = infra.config.UseImageHosts
infraConfig.CPUPeriod = p.CPUPeriod()
infraConfig.CPUQuota = p.CPUQuota()
infraConfig.CPUSetCPUs = p.ResourceLim().CPU.Cpus
infraConfig.PidNS = p.PidMode()
infraConfig.UserNS = p.UserNSMode()
namedVolumes, mounts := infra.sortUserVolumes(infra.Config().Spec)
namedVolumes, mounts := infra.sortUserVolumes(infra.config.Spec)
inspectMounts, err = infra.GetInspectMounts(namedVolumes, infra.config.ImageVolumes, mounts)
if err != nil {
return nil, err
@ -611,30 +611,30 @@ func (p *Pod) Inspect() (*define.InspectPodData, error) {
return nil, err
}
if len(infra.Config().ContainerNetworkConfig.DNSServer) > 0 {
infraConfig.DNSServer = make([]string, 0, len(infra.Config().ContainerNetworkConfig.DNSServer))
for _, entry := range infra.Config().ContainerNetworkConfig.DNSServer {
if len(infra.config.ContainerNetworkConfig.DNSServer) > 0 {
infraConfig.DNSServer = make([]string, 0, len(infra.config.ContainerNetworkConfig.DNSServer))
for _, entry := range infra.config.ContainerNetworkConfig.DNSServer {
infraConfig.DNSServer = append(infraConfig.DNSServer, entry.String())
}
}
if len(infra.Config().ContainerNetworkConfig.DNSSearch) > 0 {
infraConfig.DNSSearch = make([]string, 0, len(infra.Config().ContainerNetworkConfig.DNSSearch))
infraConfig.DNSSearch = append(infraConfig.DNSSearch, infra.Config().ContainerNetworkConfig.DNSSearch...)
if len(infra.config.ContainerNetworkConfig.DNSSearch) > 0 {
infraConfig.DNSSearch = make([]string, 0, len(infra.config.ContainerNetworkConfig.DNSSearch))
infraConfig.DNSSearch = append(infraConfig.DNSSearch, infra.config.ContainerNetworkConfig.DNSSearch...)
}
if len(infra.Config().ContainerNetworkConfig.DNSOption) > 0 {
infraConfig.DNSOption = make([]string, 0, len(infra.Config().ContainerNetworkConfig.DNSOption))
infraConfig.DNSOption = append(infraConfig.DNSOption, infra.Config().ContainerNetworkConfig.DNSOption...)
if len(infra.config.ContainerNetworkConfig.DNSOption) > 0 {
infraConfig.DNSOption = make([]string, 0, len(infra.config.ContainerNetworkConfig.DNSOption))
infraConfig.DNSOption = append(infraConfig.DNSOption, infra.config.ContainerNetworkConfig.DNSOption...)
}
if len(infra.Config().HostAdd) > 0 {
infraConfig.HostAdd = make([]string, 0, len(infra.Config().HostAdd))
infraConfig.HostAdd = append(infraConfig.HostAdd, infra.Config().HostAdd...)
if len(infra.config.HostAdd) > 0 {
infraConfig.HostAdd = make([]string, 0, len(infra.config.HostAdd))
infraConfig.HostAdd = append(infraConfig.HostAdd, infra.config.HostAdd...)
}
if len(infra.Config().ContainerNetworkConfig.Networks) > 0 {
infraConfig.Networks = make([]string, 0, len(infra.Config().ContainerNetworkConfig.Networks))
infraConfig.Networks = append(infraConfig.Networks, infra.Config().ContainerNetworkConfig.Networks...)
if len(infra.config.ContainerNetworkConfig.Networks) > 0 {
infraConfig.Networks = make([]string, 0, len(infra.config.ContainerNetworkConfig.Networks))
infraConfig.Networks = append(infraConfig.Networks, infra.config.ContainerNetworkConfig.Networks...)
}
infraConfig.NetworkOptions = infra.Config().ContainerNetworkConfig.NetworkOptions
infraConfig.PortBindings = makeInspectPortBindings(infra.Config().ContainerNetworkConfig.PortMappings, nil)
infraConfig.NetworkOptions = infra.config.ContainerNetworkConfig.NetworkOptions
infraConfig.PortBindings = makeInspectPortBindings(infra.config.ContainerNetworkConfig.PortMappings, nil)
}
inspectData := define.InspectPodData{