package libpod import ( "fmt" "github.com/containers/podman/v4/libpod/define" spec "github.com/opencontainers/runtime-spec/specs-go" ) // Validate that the configuration of a container is valid. func (c *Container) validate() error { imageIDSet := c.config.RootfsImageID != "" imageNameSet := c.config.RootfsImageName != "" rootfsSet := c.config.Rootfs != "" // If one of RootfsImageIDor RootfsImageName are set, both must be set. if (imageIDSet || imageNameSet) && !(imageIDSet && imageNameSet) { return fmt.Errorf("both RootfsImageName and RootfsImageID must be set if either is set: %w", define.ErrInvalidArg) } // Cannot set RootfsImageID and Rootfs at the same time if imageIDSet && rootfsSet { return fmt.Errorf("cannot set both an image ID and rootfs for a container: %w", define.ErrInvalidArg) } // Must set at least one of RootfsImageID or Rootfs if !(imageIDSet || rootfsSet) { return fmt.Errorf("must set root filesystem source to either image or rootfs: %w", define.ErrInvalidArg) } // A container cannot be marked as an infra and service container at // the same time. if c.IsInfra() && c.IsService() { return fmt.Errorf("cannot be infra and service container at the same time: %w", define.ErrInvalidArg) } // Cannot make a network namespace if we are joining another container's // network namespace if c.config.CreateNetNS && c.config.NetNsCtr != "" { return fmt.Errorf("cannot both create a network namespace and join another container's network namespace: %w", define.ErrInvalidArg) } if c.config.CgroupsMode == cgroupSplit && c.config.CgroupParent != "" { return fmt.Errorf("cannot specify --cgroup-mode=split with a cgroup-parent: %w", define.ErrInvalidArg) } // Not creating cgroups has a number of requirements, mostly related to // the PID namespace. if c.config.NoCgroups || c.config.CgroupsMode == "disabled" { if c.config.PIDNsCtr != "" { return fmt.Errorf("cannot join another container's PID namespace if not creating cgroups: %w", define.ErrInvalidArg) } if c.config.CgroupParent != "" { return fmt.Errorf("cannot set cgroup parent if not creating cgroups: %w", define.ErrInvalidArg) } // Ensure we have a PID namespace if c.config.Spec.Linux == nil { return fmt.Errorf("must provide Linux namespace configuration in OCI spec when using NoCgroups: %w", define.ErrInvalidArg) } foundPid := false for _, ns := range c.config.Spec.Linux.Namespaces { if ns.Type == spec.PIDNamespace { foundPid = true if ns.Path != "" { return fmt.Errorf("containers not creating Cgroups must create a private PID namespace - cannot use another: %w", define.ErrInvalidArg) } break } } if !foundPid { return fmt.Errorf("containers not creating Cgroups must create a private PID namespace: %w", define.ErrInvalidArg) } } // Can only set static IP or MAC is creating a network namespace. if !c.config.CreateNetNS && (c.config.StaticIP != nil || c.config.StaticMAC != nil) { return fmt.Errorf("cannot set static IP or MAC address if not creating a network namespace: %w", define.ErrInvalidArg) } // Cannot set static IP or MAC if joining >1 CNI network. if len(c.config.Networks) > 1 && (c.config.StaticIP != nil || c.config.StaticMAC != nil) { return fmt.Errorf("cannot set static IP or MAC address if joining more than one network: %w", define.ErrInvalidArg) } // Using image resolv.conf conflicts with various DNS settings. if c.config.UseImageResolvConf && (len(c.config.DNSSearch) > 0 || len(c.config.DNSServer) > 0 || len(c.config.DNSOption) > 0) { return fmt.Errorf("cannot configure DNS options if using image's resolv.conf: %w", define.ErrInvalidArg) } if c.config.UseImageHosts && len(c.config.HostAdd) > 0 { return fmt.Errorf("cannot add to /etc/hosts if using image's /etc/hosts: %w", define.ErrInvalidArg) } // Check named volume, overlay volume and image volume destination conflist destinations := make(map[string]bool) for _, vol := range c.config.NamedVolumes { // Don't check if they already exist. // If they don't we will automatically create them. if _, ok := destinations[vol.Dest]; ok { return fmt.Errorf("two volumes found with destination %s: %w", vol.Dest, define.ErrInvalidArg) } destinations[vol.Dest] = true } for _, vol := range c.config.OverlayVolumes { // Don't check if they already exist. // If they don't we will automatically create them. if _, ok := destinations[vol.Dest]; ok { return fmt.Errorf("two volumes found with destination %s: %w", vol.Dest, define.ErrInvalidArg) } destinations[vol.Dest] = true } for _, vol := range c.config.ImageVolumes { // Don't check if they already exist. // If they don't we will automatically create them. if _, ok := destinations[vol.Dest]; ok { return fmt.Errorf("two volumes found with destination %s: %w", vol.Dest, define.ErrInvalidArg) } destinations[vol.Dest] = true } // If User in the OCI spec is set, require that c.config.User is set for // security reasons (a lot of our code relies on c.config.User). if c.config.User == "" && (c.config.Spec.Process.User.UID != 0 || c.config.Spec.Process.User.GID != 0) { return fmt.Errorf("please set User explicitly via WithUser() instead of in OCI spec directly: %w", define.ErrInvalidArg) } // Init-ctrs must be used inside a Pod. Check if a init container type is // passed and if no pod is passed if len(c.config.InitContainerType) > 0 && len(c.config.Pod) < 1 { return fmt.Errorf("init containers must be created in a pod: %w", define.ErrInvalidArg) } return nil }