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fc6dcd12b3
We added the concept of image volumes in 2.2.0, to support inspecting an image from within a container. However, this is a strictly read-only mount, with no modification allowed. By contrast, the new `image` volume driver creates a c/storage container as its underlying storage, so we have a read/write layer. This, in and of itself, is not especially interesting, but what it will enable in the future is. If we add a new command to allow these image volumes to be committed, we can now distribute volumes - and changes to them - via a standard OCI image registry (which is rather new and quite exciting). Future work in this area: - Add support for `podman volume push` (commit volume changes and push resulting image to OCI registry). - Add support for `podman volume pull` (currently, we require that the image a volume is created from be already pulled; it would be simpler if we had a dedicated command that did the pull and made a volume from it) - Add support for scratch images (make an empty image on demand to use as the base of the volume) - Add UOR support to `podman volume push` and `podman volume pull` to enable both with non-image volume drivers Signed-off-by: Matthew Heon <matthew.heon@pm.me>
93 lines
2.9 KiB
Go
93 lines
2.9 KiB
Go
package define
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import (
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"bufio"
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"io"
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"regexp"
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"github.com/containers/common/libnetwork/types"
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)
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var (
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// DefaultSHMLockPath is the default path for SHM locks
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DefaultSHMLockPath = "/libpod_lock"
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// DefaultRootlessSHMLockPath is the default path for rootless SHM locks
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DefaultRootlessSHMLockPath = "/libpod_rootless_lock"
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// NameRegex is a regular expression to validate container/pod names.
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// This must NOT be changed from outside of Libpod. It should be a
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// constant, but Go won't let us do that.
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NameRegex = types.NameRegex
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// RegexError is thrown in presence of an invalid container/pod name.
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RegexError = types.RegexError
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// UmaskRegex is a regular expression to validate Umask.
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UmaskRegex = regexp.MustCompile(`^[0-7]{1,4}$`)
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)
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const (
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// DefaultTransport is a prefix that we apply to an image name
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// to check docker hub first for the image
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DefaultTransport = "docker://"
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)
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// InfoData holds the info type, i.e store, host etc and the data for each type
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type InfoData struct {
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Type string
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Data map[string]interface{}
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}
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// VolumeDriverLocal is the "local" volume driver. It is managed by libpod
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// itself.
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const VolumeDriverLocal = "local"
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// VolumeDriverImage is the "image" volume driver. It is managed by Libpod and
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// uses volumes backed by an image.
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const VolumeDriverImage = "image"
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const (
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OCIManifestDir = "oci-dir"
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OCIArchive = "oci-archive"
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V2s2ManifestDir = "docker-dir"
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V2s2Archive = "docker-archive"
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)
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// AttachStreams contains streams that will be attached to the container
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type AttachStreams struct {
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// OutputStream will be attached to container's STDOUT
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OutputStream io.WriteCloser
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// ErrorStream will be attached to container's STDERR
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ErrorStream io.WriteCloser
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// InputStream will be attached to container's STDIN
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InputStream *bufio.Reader
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// AttachOutput is whether to attach to STDOUT
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// If false, stdout will not be attached
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AttachOutput bool
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// AttachError is whether to attach to STDERR
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// If false, stdout will not be attached
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AttachError bool
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// AttachInput is whether to attach to STDIN
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// If false, stdout will not be attached
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AttachInput bool
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}
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// JournaldLogging is the string conmon expects to specify journald logging
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const JournaldLogging = "journald"
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// KubernetesLogging is the string conmon expects when specifying to use the kubernetes logging format
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const KubernetesLogging = "k8s-file"
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// JSONLogging is the string conmon expects when specifying to use the json logging format
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const JSONLogging = "json-file"
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// NoLogging is the string conmon expects when specifying to use no log driver whatsoever
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const NoLogging = "none"
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// PassthroughLogging is the string conmon expects when specifying to use the passthrough driver
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const PassthroughLogging = "passthrough"
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// DefaultRlimitValue is the value set by default for nofile and nproc
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const RLimitDefaultValue = uint64(1048576)
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// BindMountPrefix distinguishes its annotations from others
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const BindMountPrefix = "bind-mount-options"
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