func (cmd *GuardianCommand) wireNetworker(log lager.Logger, propManager kawasaki.ConfigStore, portPool *ports.PortPool) (gardener.Networker, gardener.Starter, error) {
externalIP, err := defaultExternalIP(cmd.Network.ExternalIP)
if err != nil {
return nil, nil, err
}
dnsServers := make([]net.IP, len(cmd.Network.DNSServers))
for i, ip := range cmd.Network.DNSServers {
dnsServers[i] = ip.IP()
}
if cmd.Network.Plugin.Path() != "" {
resolvConfigurer := &kawasaki.ResolvConfigurer{
HostsFileCompiler: &dns.HostsFileCompiler{},
ResolvFileCompiler: &dns.ResolvFileCompiler{},
FileWriter: &dns.RootfsWriter{},
IDMapReader: &kawasaki.RootIdMapReader{},
}
externalNetworker := netplugin.New(
linux_command_runner.New(),
propManager,
externalIP,
dnsServers,
resolvConfigurer,
cmd.Network.Plugin.Path(),
cmd.Network.PluginExtraArgs,
)
return externalNetworker, externalNetworker, nil
}
var denyNetworksList []string
for _, network := range cmd.Network.DenyNetworks {
denyNetworksList = append(denyNetworksList, network.String())
}
interfacePrefix := fmt.Sprintf("w%s", cmd.Server.Tag)
chainPrefix := fmt.Sprintf("w-%s-", cmd.Server.Tag)
idGenerator := kawasaki.NewSequentialIDGenerator(time.Now().UnixNano())
iptRunner := &logging.Runner{CommandRunner: linux_command_runner.New(), Logger: log.Session("iptables-runner")}
locksmith := &locksmithpkg.FileSystem{}
ipTables := iptables.New(cmd.Bin.IPTables.Path(), cmd.Bin.IPTablesRestore.Path(), iptRunner, locksmith, chainPrefix)
ipTablesStarter := iptables.NewStarter(ipTables, cmd.Network.AllowHostAccess, interfacePrefix, denyNetworksList, cmd.Containers.DestroyContainersOnStartup)
ruleTranslator := iptables.NewRuleTranslator()
networker := kawasaki.New(
kawasaki.SpecParserFunc(kawasaki.ParseSpec),
subnets.NewPool(cmd.Network.Pool.CIDR()),
kawasaki.NewConfigCreator(idGenerator, interfacePrefix, chainPrefix, externalIP, dnsServers, cmd.Network.Mtu),
propManager,
factory.NewDefaultConfigurer(ipTables),
portPool,
iptables.NewPortForwarder(ipTables),
iptables.NewFirewallOpener(ruleTranslator, ipTables),
)
return networker, ipTablesStarter, nil
}
package kawasaki_test
import (
"code.cloudfoundry.org/guardian/kawasaki"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("Generate", func() {
It("generates an 11 character ID", func() {
idgen := kawasaki.NewSequentialIDGenerator(0)
Expect(idgen.Generate()).To(HaveLen(11))
})
It("generates unique IDs on each invocation", func() {
idgen := kawasaki.NewSequentialIDGenerator(0)
id1 := idgen.Generate()
id2 := idgen.Generate()
Expect(id1).NotTo(Equal(id2))
})
It("generates deterministic IDs based on the seed", func() {
idgen := kawasaki.NewSequentialIDGenerator(0)
id1 := idgen.Generate()
id2 := idgen.Generate()
idgen = kawasaki.NewSequentialIDGenerator(1)
id3 := idgen.Generate()
Expect(id1).NotTo(Equal(id2))