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-rw-r--r--pkg/specgen/container_validate.go167
1 files changed, 167 insertions, 0 deletions
diff --git a/pkg/specgen/container_validate.go b/pkg/specgen/container_validate.go
new file mode 100644
index 000000000..aad14ddcb
--- /dev/null
+++ b/pkg/specgen/container_validate.go
@@ -0,0 +1,167 @@
+package specgen
+
+import (
+ "strings"
+
+ "github.com/containers/libpod/pkg/rootless"
+ "github.com/containers/libpod/pkg/util"
+ "github.com/pkg/errors"
+)
+
+var (
+ // ErrInvalidSpecConfig describes an error that the given SpecGenerator is invalid
+ ErrInvalidSpecConfig error = errors.New("invalid configuration")
+ // SystemDValues describes the only values that SystemD can be
+ SystemDValues = []string{"true", "false", "always"}
+ // ImageVolumeModeValues describes the only values that ImageVolumeMode can be
+ ImageVolumeModeValues = []string{"ignore", "tmpfs", "bind"}
+)
+
+func exclusiveOptions(opt1, opt2 string) error {
+ return errors.Errorf("%s and %s are mutually exclusive options", opt1, opt2)
+}
+
+// Validate verifies that the given SpecGenerator is valid and satisfies required
+// input for creating a container.
+func (s *SpecGenerator) Validate() error {
+
+ //
+ // ContainerBasicConfig
+ //
+ // Rootfs and Image cannot both populated
+ if len(s.ContainerStorageConfig.Image) > 0 && len(s.ContainerStorageConfig.Rootfs) > 0 {
+ return errors.Wrap(ErrInvalidSpecConfig, "both image and rootfs cannot be simultaneously")
+ }
+ // Cannot set hostname and utsns
+ if len(s.ContainerBasicConfig.Hostname) > 0 && !s.ContainerBasicConfig.UtsNS.IsPrivate() {
+ return errors.Wrap(ErrInvalidSpecConfig, "cannot set hostname when creating an UTS namespace")
+ }
+ // systemd values must be true, false, or always
+ if len(s.ContainerBasicConfig.Systemd) > 0 && !util.StringInSlice(strings.ToLower(s.ContainerBasicConfig.Systemd), SystemDValues) {
+ return errors.Wrapf(ErrInvalidSpecConfig, "SystemD values must be one of %s", strings.Join(SystemDValues, ","))
+ }
+
+ //
+ // ContainerStorageConfig
+ //
+ // rootfs and image cannot both be set
+ if len(s.ContainerStorageConfig.Image) > 0 && len(s.ContainerStorageConfig.Rootfs) > 0 {
+ return exclusiveOptions("rootfs", "image")
+ }
+ // imagevolumemode must be one of ignore, tmpfs, or anonymous if given
+ if len(s.ContainerStorageConfig.ImageVolumeMode) > 0 && !util.StringInSlice(strings.ToLower(s.ContainerStorageConfig.ImageVolumeMode), ImageVolumeModeValues) {
+ return errors.Errorf("ImageVolumeMode values must be one of %s", strings.Join(ImageVolumeModeValues, ","))
+ }
+ // shmsize conflicts with IPC namespace
+ if s.ContainerStorageConfig.ShmSize != nil && !s.ContainerStorageConfig.IpcNS.IsPrivate() {
+ return errors.New("cannot set shmsize when creating an IPC namespace")
+ }
+
+ //
+ // ContainerSecurityConfig
+ //
+ // groups and privileged are exclusive
+ if len(s.Groups) > 0 && s.Privileged {
+ return exclusiveOptions("Groups", "privileged")
+ }
+ // capadd and privileged are exclusive
+ if len(s.CapAdd) > 0 && s.Privileged {
+ return exclusiveOptions("CapAdd", "privileged")
+ }
+ // selinuxprocesslabel and privileged are exclusive
+ if len(s.SelinuxProcessLabel) > 0 && s.Privileged {
+ return exclusiveOptions("SelinuxProcessLabel", "privileged")
+ }
+ // selinuxmounmtlabel and privileged are exclusive
+ if len(s.SelinuxMountLabel) > 0 && s.Privileged {
+ return exclusiveOptions("SelinuxMountLabel", "privileged")
+ }
+ // selinuxopts and privileged are exclusive
+ if len(s.SelinuxOpts) > 0 && s.Privileged {
+ return exclusiveOptions("SelinuxOpts", "privileged")
+ }
+ // apparmor and privileged are exclusive
+ if len(s.ApparmorProfile) > 0 && s.Privileged {
+ return exclusiveOptions("AppArmorProfile", "privileged")
+ }
+ // userns and idmappings conflict
+ if s.UserNS.IsPrivate() && s.IDMappings == nil {
+ return errors.Wrap(ErrInvalidSpecConfig, "IDMappings are required when not creating a User namespace")
+ }
+
+ //
+ // ContainerCgroupConfig
+ //
+ //
+ // None for now
+
+ //
+ // ContainerNetworkConfig
+ //
+ if !s.NetNS.IsPrivate() && s.ConfigureNetNS {
+ return errors.New("can only configure network namespace when creating a network a network namespace")
+ }
+ // useimageresolveconf conflicts with dnsserver, dnssearch, dnsoption
+ if s.UseImageResolvConf {
+ if len(s.DNSServer) > 0 {
+ return exclusiveOptions("UseImageResolvConf", "DNSServer")
+ }
+ if len(s.DNSSearch) > 0 {
+ return exclusiveOptions("UseImageResolvConf", "DNSSearch")
+ }
+ if len(s.DNSOption) > 0 {
+ return exclusiveOptions("UseImageResolvConf", "DNSOption")
+ }
+ }
+ // UseImageHosts and HostAdd are exclusive
+ if s.UseImageHosts && len(s.HostAdd) > 0 {
+ return exclusiveOptions("UseImageHosts", "HostAdd")
+ }
+
+ // TODO the specgen does not appear to handle this? Should it
+ //switch config.Cgroup.Cgroups {
+ //case "disabled":
+ // if addedResources {
+ // return errors.New("cannot specify resource limits when cgroups are disabled is specified")
+ // }
+ // configSpec.Linux.Resources = &spec.LinuxResources{}
+ //case "enabled", "no-conmon", "":
+ // // Do nothing
+ //default:
+ // return errors.New("unrecognized option for cgroups; supported are 'default', 'disabled', 'no-conmon'")
+ //}
+
+ // Namespaces
+ if err := s.UtsNS.validate(); err != nil {
+ return err
+ }
+ if err := s.IpcNS.validate(); err != nil {
+ return err
+ }
+ if err := s.PidNS.validate(); err != nil {
+ return err
+ }
+ if err := s.CgroupNS.validate(); err != nil {
+ return err
+ }
+ if err := s.UserNS.validate(); err != nil {
+ return err
+ }
+
+ // The following are defaults as needed by container creation
+ if len(s.WorkDir) < 1 {
+ s.WorkDir = "/"
+ }
+
+ // Set defaults if network info is not provided
+ if s.NetNS.NSMode == "" {
+ s.NetNS.NSMode = Bridge
+ if rootless.IsRootless() {
+ s.NetNS.NSMode = Slirp
+ }
+ }
+ if err := validateNetNS(&s.NetNS); err != nil {
+ return err
+ }
+ return nil
+}