Martynas Pumputis
fd0a7efa23
The #2418 has changed a behaviour of "weave ps" which outputs "Link not found" in the case of weave not running. The previous behaviour was to output an empty line.
85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/fsouza/go-dockerclient"
|
|
"github.com/vishvananda/netlink"
|
|
|
|
"github.com/weaveworks/weave/common"
|
|
weavenet "github.com/weaveworks/weave/net"
|
|
)
|
|
|
|
func containerAddrs(args []string) error {
|
|
if len(args) < 1 {
|
|
cmdUsage("container-addrs", "<bridgeName> [containerID ...]")
|
|
}
|
|
bridgeName := args[0]
|
|
|
|
client, err := docker.NewVersionedClientFromEnv("1.18")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
pred, err := common.ConnectedToBridgePredicate(bridgeName)
|
|
if err != nil {
|
|
if err == weavenet.ErrLinkNotFound {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
var containerIDs []string
|
|
containers := make(map[string]*docker.Container)
|
|
|
|
for _, cid := range args[1:] {
|
|
if cid == "weave:expose" {
|
|
netDev, err := common.GetBridgeNetDev(bridgeName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
printNetDevs(cid, []common.NetDev{netDev})
|
|
continue
|
|
}
|
|
if containers[cid], err = client.InspectContainer(cid); err != nil {
|
|
if _, ok := err.(*docker.NoSuchContainer); ok {
|
|
continue
|
|
}
|
|
return err
|
|
}
|
|
// To output in the right order, we keep the list of container IDs
|
|
containerIDs = append(containerIDs, cid)
|
|
}
|
|
|
|
// NB: Because network namespaces (netns) are changed many times inside the loop,
|
|
// it's NOT safe to exec any code depending on the root netns without
|
|
// wrapping with WithNetNS*.
|
|
for _, cid := range containerIDs {
|
|
netDevs, err := getNetDevs(client, containers[cid], pred)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
printNetDevs(cid, netDevs)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func getNetDevs(c *docker.Client, container *docker.Container, pred func(netlink.Link) bool) ([]common.NetDev, error) {
|
|
if container.State.Pid == 0 {
|
|
return nil, nil
|
|
}
|
|
return common.GetNetDevsWithPredicate(container.State.Pid, pred)
|
|
}
|
|
|
|
func printNetDevs(cid string, netDevs []common.NetDev) {
|
|
for _, netDev := range netDevs {
|
|
fmt.Printf("%12s %s %s", cid, netDev.Name, netDev.MAC.String())
|
|
for _, cidr := range netDev.CIDRs {
|
|
prefixLength, _ := cidr.Mask.Size()
|
|
fmt.Printf(" %v/%v", cidr.IP, prefixLength)
|
|
}
|
|
fmt.Println()
|
|
}
|
|
}
|