// Run implements Command.Run.
func (c *ListCommand) Run(ctx *cmd.Context) error {
return c.RunWithAPI(ctx, func(api SubnetAPI, ctx *cmd.Context) error {
// Validate space and/or zone, if given to display a nicer error
// message.
// Get the list of subnets, filtering them as requested.
subnets, err := api.ListSubnets(c.spaceTag, c.ZoneName)
if err != nil {
return errors.Annotate(err, "cannot list subnets")
}
// Display a nicer message in case no subnets were found.
if len(subnets) == 0 {
if c.SpaceName != "" || c.ZoneName != "" {
ctx.Infof("no subnets found matching requested criteria")
} else {
ctx.Infof("no subnets to display")
}
return nil
}
// Construct the output list for displaying with the chosen
// format.
result := formattedList{
Subnets: make(map[string]formattedSubnet),
}
for _, sub := range subnets {
subResult := formattedSubnet{
ProviderId: sub.ProviderId,
Zones: sub.Zones,
}
// Use the CIDR to determine the subnet type.
if ip, _, err := net.ParseCIDR(sub.CIDR); err != nil {
return errors.Errorf("subnet %q has invalid CIDR", sub.CIDR)
} else if ip.To4() != nil {
subResult.Type = typeIPv4
} else if ip.To16() != nil {
subResult.Type = typeIPv6
}
// Space must be valid, but verify anyway.
spaceTag, err := names.ParseSpaceTag(sub.SpaceTag)
if err != nil {
return errors.Annotatef(err, "subnet %q has invalid space", sub.CIDR)
}
subResult.Space = spaceTag.Id()
// Display correct status according to the life cycle value.
switch sub.Life {
case params.Alive:
subResult.Status = statusInUse
case params.Dying, params.Dead:
subResult.Status = statusTerminating
}
result.Subnets[sub.CIDR] = subResult
}
return c.out.Write(ctx, result)
})
}
func (s *spaceSuite) TestParseSpaceTag(c *gc.C) {
for i, t := range parseSpaceTagTests {
c.Logf("test %d: %s", i, t.tag)
got, err := names.ParseSpaceTag(t.tag)
if err != nil || t.err != nil {
c.Check(err, gc.DeepEquals, t.err)
continue
}
c.Check(got, gc.FitsTypeOf, t.expected)
c.Check(got, gc.Equals, t.expected)
}
}
// ListSubnets lists all the available subnets or only those matching
// all given optional filters.
func ListSubnets(api NetworkBacking, args params.SubnetsFilters) (results params.ListSubnetsResults, err error) {
subnets, err := api.AllSubnets()
if err != nil {
return results, errors.Trace(err)
}
var spaceFilter string
if args.SpaceTag != "" {
tag, err := names.ParseSpaceTag(args.SpaceTag)
if err != nil {
return results, errors.Trace(err)
}
spaceFilter = tag.Id()
}
zoneFilter := args.Zone
for _, subnet := range subnets {
if spaceFilter != "" && subnet.SpaceName() != spaceFilter {
logger.Tracef(
"filtering subnet %q from space %q not matching filter %q",
subnet.CIDR(), subnet.SpaceName(), spaceFilter,
)
continue
}
zoneSet := set.NewStrings(subnet.AvailabilityZones()...)
if zoneFilter != "" && !zoneSet.IsEmpty() && !zoneSet.Contains(zoneFilter) {
logger.Tracef(
"filtering subnet %q with zones %v not matching filter %q",
subnet.CIDR(), subnet.AvailabilityZones(), zoneFilter,
)
continue
}
result := params.Subnet{
CIDR: subnet.CIDR(),
ProviderId: string(subnet.ProviderId()),
VLANTag: subnet.VLANTag(),
Life: subnet.Life(),
SpaceTag: names.NewSpaceTag(subnet.SpaceName()).String(),
Zones: subnet.AvailabilityZones(),
Status: subnet.Status(),
}
results.Results = append(results.Results, result)
}
return results, nil
}
// validateSpace parses the given spaceTag and verifies it exists by looking it
// up in the cache (or populates the cache if empty).
func (cache *addSubnetsCache) validateSpace(spaceTag string) (*names.SpaceTag, error) {
if spaceTag == "" {
return nil, errors.Errorf("SpaceTag is required")
}
tag, err := names.ParseSpaceTag(spaceTag)
if err != nil {
return nil, errors.Annotate(err, "given SpaceTag is invalid")
}
// Otherwise we need the cache to validate.
if cache.allSpaces == nil {
// Not yet cached.
logger.Tracef("caching known spaces")
allSpaces, err := cache.api.AllSpaces()
if err != nil {
return nil, errors.Annotate(err, "cannot validate given SpaceTag")
}
cache.allSpaces = set.NewStrings()
for _, space := range allSpaces {
if cache.allSpaces.Contains(space.Name()) {
logger.Warningf("ignoring duplicated space %q", space.Name())
continue
}
cache.allSpaces.Add(space.Name())
}
}
if cache.allSpaces.IsEmpty() {
return nil, errors.Errorf("no spaces defined")
}
logger.Tracef("using cached spaces: %v", cache.allSpaces.SortedValues())
if !cache.allSpaces.Contains(tag.Id()) {
return nil, errors.NotFoundf("space %q", tag.Id()) // " not found"
}
return &tag, nil
}
func (api *spacesAPI) createOneSpace(args params.CreateSpaceParams) error {
// Validate the args, assemble information for api.backing.AddSpaces
var subnets []string
spaceTag, err := names.ParseSpaceTag(args.SpaceTag)
if err != nil {
return errors.Trace(err)
}
for _, tag := range args.SubnetTags {
subnetTag, err := names.ParseSubnetTag(tag)
if err != nil {
return errors.Trace(err)
}
subnets = append(subnets, subnetTag.Id())
}
// Add the validated space
err = api.backing.AddSpace(spaceTag.Id(), subnets, args.Public)
if err != nil {
return errors.Trace(err)
}
return nil
}
