88 lines
2.8 KiB
Go
88 lines
2.8 KiB
Go
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package define
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import (
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"fmt"
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)
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// NamespaceOption controls how we set up a namespace when launching processes.
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type NamespaceOption struct {
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// Name specifies the type of namespace, typically matching one of the
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// ...Namespace constants defined in
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// github.com/opencontainers/runtime-spec/specs-go.
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Name string
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// Host is used to force our processes to use the host's namespace of
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// this type.
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Host bool
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// Path is the path of the namespace to attach our process to, if Host
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// is not set. If Host is not set and Path is also empty, a new
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// namespace will be created for the process that we're starting.
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// If Name is specs.NetworkNamespace, if Path doesn't look like an
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// absolute path, it is treated as a comma-separated list of CNI
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// configuration names which will be selected from among all of the CNI
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// network configurations which we find.
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Path string
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}
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// NamespaceOptions provides some helper methods for a slice of NamespaceOption
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// structs.
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type NamespaceOptions []NamespaceOption
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// Find the configuration for the namespace of the given type. If there are
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// duplicates, find the _last_ one of the type, since we assume it was appended
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// more recently.
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func (n *NamespaceOptions) Find(namespace string) *NamespaceOption {
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for i := range *n {
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j := len(*n) - 1 - i
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if (*n)[j].Name == namespace {
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return &((*n)[j])
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}
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}
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return nil
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}
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// AddOrReplace either adds or replaces the configuration for a given namespace.
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func (n *NamespaceOptions) AddOrReplace(options ...NamespaceOption) {
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nextOption:
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for _, option := range options {
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for i := range *n {
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j := len(*n) - 1 - i
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if (*n)[j].Name == option.Name {
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(*n)[j] = option
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continue nextOption
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}
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}
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*n = append(*n, option)
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}
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}
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// NetworkConfigurationPolicy takes the value NetworkDefault, NetworkDisabled,
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// or NetworkEnabled.
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type NetworkConfigurationPolicy int
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const (
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// NetworkDefault is one of the values that BuilderOptions.ConfigureNetwork
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// can take, signalling that the default behavior should be used.
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NetworkDefault NetworkConfigurationPolicy = iota
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// NetworkDisabled is one of the values that BuilderOptions.ConfigureNetwork
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// can take, signalling that network interfaces should NOT be configured for
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// newly-created network namespaces.
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NetworkDisabled
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// NetworkEnabled is one of the values that BuilderOptions.ConfigureNetwork
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// can take, signalling that network interfaces should be configured for
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// newly-created network namespaces.
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NetworkEnabled
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)
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// String formats a NetworkConfigurationPolicy as a string.
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func (p NetworkConfigurationPolicy) String() string {
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switch p {
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case NetworkDefault:
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return "NetworkDefault"
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case NetworkDisabled:
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return "NetworkDisabled"
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case NetworkEnabled:
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return "NetworkEnabled"
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}
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return fmt.Sprintf("unknown NetworkConfigurationPolicy %d", p)
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}
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