mirror of
https://github.com/podman-container-tools/podman.git
synced 2026-10-16 02:47:41 +00:00
4febe55769
Add a new boltdb to handle IPAM assignment. The db structure is the following: Each network has their own bucket with the network name as bucket key. Inside the network bucket there is an ID bucket which maps the container ID (key) to a json array of ip addresses (value). The network bucket also has a bucket for each subnet, the subnet is used as key. Inside the subnet bucket an ip is used as key and the container ID as value. The db should be stored on a tmpfs to ensure we always have a clean state after a reboot. Signed-off-by: Paul Holzinger <pholzing@redhat.com>
433 lines
13 KiB
Go
433 lines
13 KiB
Go
package netavark
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"path/filepath"
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"github.com/containers/podman/v3/libpod/network/types"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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"github.com/sirupsen/logrus"
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)
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var _ = Describe("IPAM", func() {
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var (
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networkInterface *netavarkNetwork
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networkConfDir string
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logBuffer bytes.Buffer
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)
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BeforeEach(func() {
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var err error
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networkConfDir, err = ioutil.TempDir("", "podman_netavark_test")
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if err != nil {
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Fail("Failed to create tmpdir")
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}
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logBuffer = bytes.Buffer{}
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logrus.SetOutput(&logBuffer)
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})
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JustBeforeEach(func() {
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libpodNet, err := NewNetworkInterface(InitConfig{
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NetworkConfigDir: networkConfDir,
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IPAMDBPath: filepath.Join(networkConfDir, "ipam.db"),
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LockFile: filepath.Join(networkConfDir, "netavark.lock"),
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})
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if err != nil {
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Fail("Failed to create NewCNINetworkInterface")
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}
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networkInterface = libpodNet.(*netavarkNetwork)
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// run network list to force a network load
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networkInterface.NetworkList()
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})
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AfterEach(func() {
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os.RemoveAll(networkConfDir)
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})
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It("simple ipam alloc", func() {
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netName := types.DefaultNetworkName
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for i := 2; i < 100; i++ {
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opts := &types.NetworkOptions{
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ContainerID: "someContainerID",
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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err := networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP(fmt.Sprintf("10.88.0.%d", i)).To4()))
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}
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})
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It("ipam try to alloc same ip", func() {
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netName := types.DefaultNetworkName
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opts := &types.NetworkOptions{
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ContainerID: "someContainerID",
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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err := networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP("10.88.0.2").To4()))
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opts = &types.NetworkOptions{
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ContainerID: "otherID",
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Networks: map[string]types.PerNetworkOptions{
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netName: {StaticIPs: []net.IP{net.ParseIP("10.88.0.2")}},
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},
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}
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err = networkInterface.allocIPs(opts)
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Expect(err).To(HaveOccurred())
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Expect(err.Error()).To(Equal("IPAM error: requested ip address 10.88.0.2 is already allocated to container ID someContainerID"))
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})
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It("ipam try to alloc more ips as in range", func() {
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s, _ := types.ParseCIDR("10.0.0.1/24")
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network, err := networkInterface.NetworkCreate(types.Network{
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Subnets: []types.Subnet{
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{
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Subnet: s,
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LeaseRange: &types.LeaseRange{
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StartIP: net.ParseIP("10.0.0.10"),
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EndIP: net.ParseIP("10.0.0.20"),
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},
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},
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},
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})
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Expect(err).ToNot(HaveOccurred())
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netName := network.Name
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for i := 10; i < 21; i++ {
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opts := &types.NetworkOptions{
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ContainerID: fmt.Sprintf("someContainerID-%d", i),
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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err = networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP(fmt.Sprintf("10.0.0.%d", i)).To4()))
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}
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opts := &types.NetworkOptions{
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ContainerID: "someContainerID-22",
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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// now this should fail because all free ips are already assigned
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err = networkInterface.allocIPs(opts)
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Expect(err).To(HaveOccurred())
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Expect(err.Error()).To(Equal("IPAM error: failed to find free IP in range: 10.0.0.10 - 10.0.0.20"))
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})
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It("ipam basic setup", func() {
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netName := types.DefaultNetworkName
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opts := &types.NetworkOptions{
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ContainerID: "someContainerID",
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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expectedIP := net.ParseIP("10.88.0.2").To4()
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err := networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(expectedIP))
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// remove static ips from opts
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netOpts := opts.Networks[netName]
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netOpts.StaticIPs = nil
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opts.Networks[netName] = netOpts
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err = networkInterface.getAssignedIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(expectedIP))
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err = networkInterface.allocIPs(opts)
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Expect(err).To(HaveOccurred())
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Expect(err.Error()).To(Equal("IPAM error: requested ip address 10.88.0.2 is already allocated to container ID someContainerID"))
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// dealloc the ip
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err = networkInterface.deallocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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err = networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(expectedIP))
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})
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It("ipam dual stack", func() {
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s1, _ := types.ParseCIDR("10.0.0.0/26")
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s2, _ := types.ParseCIDR("fd80::/24")
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network, err := networkInterface.NetworkCreate(types.Network{
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Subnets: []types.Subnet{
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{
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Subnet: s1,
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},
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{
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Subnet: s2,
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},
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},
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})
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Expect(err).ToNot(HaveOccurred())
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netName := network.Name
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opts := &types.NetworkOptions{
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ContainerID: "someContainerID",
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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err = networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(2))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP("10.0.0.2").To4()))
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Expect(opts.Networks[netName].StaticIPs[1]).To(Equal(net.ParseIP("fd80::2")))
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// remove static ips from opts
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netOpts := opts.Networks[netName]
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netOpts.StaticIPs = nil
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opts.Networks[netName] = netOpts
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err = networkInterface.getAssignedIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(2))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP("10.0.0.2").To4()))
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Expect(opts.Networks[netName].StaticIPs[1]).To(Equal(net.ParseIP("fd80::2")))
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err = networkInterface.deallocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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// try to alloc the same again
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err = networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(2))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP("10.0.0.2").To4()))
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Expect(opts.Networks[netName].StaticIPs[1]).To(Equal(net.ParseIP("fd80::2")))
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})
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It("ipam with two networks", func() {
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s, _ := types.ParseCIDR("10.0.0.0/24")
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network, err := networkInterface.NetworkCreate(types.Network{
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Subnets: []types.Subnet{
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{
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Subnet: s,
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},
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},
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})
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Expect(err).ToNot(HaveOccurred())
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netName1 := network.Name
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s, _ = types.ParseCIDR("10.0.1.0/24")
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network, err = networkInterface.NetworkCreate(types.Network{
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Subnets: []types.Subnet{
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{
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Subnet: s,
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},
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},
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})
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Expect(err).ToNot(HaveOccurred())
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netName2 := network.Name
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opts := &types.NetworkOptions{
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ContainerID: "someContainerID",
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Networks: map[string]types.PerNetworkOptions{
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netName1: {},
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netName2: {},
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},
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}
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err = networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName1))
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Expect(opts.Networks[netName1].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName1].StaticIPs[0]).To(Equal(net.ParseIP("10.0.0.2").To4()))
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Expect(opts.Networks).To(HaveKey(netName2))
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Expect(opts.Networks[netName2].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName2].StaticIPs[0]).To(Equal(net.ParseIP("10.0.1.2").To4()))
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// remove static ips from opts
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netOpts := opts.Networks[netName1]
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netOpts.StaticIPs = nil
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opts.Networks[netName1] = netOpts
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netOpts = opts.Networks[netName2]
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netOpts.StaticIPs = nil
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opts.Networks[netName2] = netOpts
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err = networkInterface.getAssignedIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName1))
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Expect(opts.Networks[netName1].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName1].StaticIPs[0]).To(Equal(net.ParseIP("10.0.0.2").To4()))
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Expect(opts.Networks).To(HaveKey(netName2))
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Expect(opts.Networks[netName2].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName2].StaticIPs[0]).To(Equal(net.ParseIP("10.0.1.2").To4()))
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err = networkInterface.deallocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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// try to alloc the same again
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err = networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName1))
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Expect(opts.Networks[netName1].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName1].StaticIPs[0]).To(Equal(net.ParseIP("10.0.0.2").To4()))
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Expect(opts.Networks).To(HaveKey(netName2))
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Expect(opts.Networks[netName2].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName2].StaticIPs[0]).To(Equal(net.ParseIP("10.0.1.2").To4()))
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})
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It("ipam alloc more ips as in subnet", func() {
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s, _ := types.ParseCIDR("10.0.0.0/26")
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network, err := networkInterface.NetworkCreate(types.Network{
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Subnets: []types.Subnet{
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{
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Subnet: s,
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},
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},
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})
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Expect(err).ToNot(HaveOccurred())
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netName := network.Name
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for i := 2; i < 64; i++ {
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opts := &types.NetworkOptions{
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ContainerID: fmt.Sprintf("id-%d", i),
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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err = networkInterface.allocIPs(opts)
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if i < 63 {
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP(fmt.Sprintf("10.0.0.%d", i)).To4()))
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} else {
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Expect(err).To(HaveOccurred())
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Expect(err.Error()).To(Equal("IPAM error: failed to find free IP in range: 10.0.0.1 - 10.0.0.62"))
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}
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}
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})
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It("ipam alloc -> dealloc -> alloc", func() {
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s, _ := types.ParseCIDR("10.0.0.0/27")
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network, err := networkInterface.NetworkCreate(types.Network{
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Subnets: []types.Subnet{
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{
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Subnet: s,
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},
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},
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})
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Expect(err).ToNot(HaveOccurred())
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netName := network.Name
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for i := 2; i < 10; i++ {
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opts := types.NetworkOptions{
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ContainerID: fmt.Sprintf("id-%d", i),
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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err = networkInterface.allocIPs(&opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP(fmt.Sprintf("10.0.0.%d", i)).To4()))
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err = networkInterface.deallocIPs(&opts)
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Expect(err).ToNot(HaveOccurred())
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}
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for i := 0; i < 30; i++ {
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opts := types.NetworkOptions{
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ContainerID: fmt.Sprintf("id-%d", i),
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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err = networkInterface.allocIPs(&opts)
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if i < 29 {
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(1))
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// The (i+8)%29+2 part looks cryptic but it is actually simple, we already have 8 ips allocated above
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// so we expect the 8 available ip. We have 29 assignable ip addresses in this subnet because "i"+8 can
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// be greater than 30 we have to modulo by 29 to go back to the beginning. Also the first free ip is
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// network address + 2, so we have to add 2 to the result
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Expect(opts.Networks[netName].StaticIPs[0]).To(Equal(net.ParseIP(fmt.Sprintf("10.0.0.%d", (i+8)%29+2)).To4()))
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} else {
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Expect(err).To(HaveOccurred())
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Expect(err.Error()).To(Equal("IPAM error: failed to find free IP in range: 10.0.0.1 - 10.0.0.30"))
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}
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}
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})
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It("ipam with dhcp driver should not set ips", func() {
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network, err := networkInterface.NetworkCreate(types.Network{
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IPAMOptions: map[string]string{
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"driver": types.DHCPIPAMDriver,
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},
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})
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Expect(err).ToNot(HaveOccurred())
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netName := network.Name
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opts := &types.NetworkOptions{
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ContainerID: "someContainerID",
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Networks: map[string]types.PerNetworkOptions{
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netName: {},
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},
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}
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err = networkInterface.allocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(0))
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err = networkInterface.getAssignedIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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Expect(opts.Networks).To(HaveKey(netName))
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Expect(opts.Networks[netName].StaticIPs).To(HaveLen(0))
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// dealloc the ip
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err = networkInterface.deallocIPs(opts)
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Expect(err).ToNot(HaveOccurred())
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})
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})
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