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Merge pull request #3 from adrianchiris/nv-ipam
nv-ipam CNI plugin
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| /* | ||
| Copyright 2023, NVIDIA CORPORATION & AFFILIATES | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
||
| "github.com/containernetworking/cni/pkg/skel" | ||
| "github.com/containernetworking/cni/pkg/version" | ||
|
|
||
| "github.com/Mellanox/nvidia-k8s-ipam/pkg/cni/plugin" | ||
| ) | ||
|
|
||
| func main() { | ||
| p := plugin.NewPlugin() | ||
| about := fmt.Sprintf("%s CNI plugin %s", p.Name, p.Version) | ||
| skel.PluginMain(p.CmdAdd, p.CmdCheck, p.CmdDel, version.All, about) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| /* | ||
| Copyright 2023, NVIDIA CORPORATION & AFFILIATES | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package k8sclient | ||
|
|
||
| import ( | ||
| "k8s.io/client-go/kubernetes" | ||
| "k8s.io/client-go/tools/clientcmd" | ||
| ) | ||
|
|
||
| // FromKubeconfig returns a kubernetes client created from provided kubeconfig path | ||
| func FromKubeconfig(kubeconfigPath string) (*kubernetes.Clientset, error) { | ||
| cfg, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig( | ||
| &clientcmd.ClientConfigLoadingRules{ExplicitPath: kubeconfigPath}, | ||
| &clientcmd.ConfigOverrides{}).ClientConfig() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| k8sClient, err := kubernetes.NewForConfig(cfg) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return k8sClient, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,189 @@ | ||
| /* | ||
| Copyright 2023, NVIDIA CORPORATION & AFFILIATES | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package plugin | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/containernetworking/cni/pkg/skel" | ||
| cnitypes "github.com/containernetworking/cni/pkg/types" | ||
| "github.com/containernetworking/plugins/pkg/ipam" | ||
| log "github.com/k8snetworkplumbingwg/cni-log" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/kubernetes" | ||
|
|
||
| "github.com/Mellanox/nvidia-k8s-ipam/pkg/cni/pool" | ||
| "github.com/Mellanox/nvidia-k8s-ipam/pkg/cni/types" | ||
| "github.com/Mellanox/nvidia-k8s-ipam/pkg/version" | ||
| ) | ||
|
|
||
| const ( | ||
| CNIPluginName = "nv-ipam" | ||
|
|
||
| delegateIPAMPluginName = "host-local" | ||
| ) | ||
|
|
||
| func NewPlugin() *Plugin { | ||
| return &Plugin{ | ||
| Name: CNIPluginName, | ||
| Version: version.GetVersionString(), | ||
| } | ||
| } | ||
|
|
||
| type Plugin struct { | ||
| Name string | ||
| Version string | ||
| } | ||
|
|
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| func (p *Plugin) CmdAdd(args *skel.CmdArgs) error { | ||
| conf, err := types.LoadConf(args.StdinData) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to load config. %w", err) | ||
| } | ||
| setupLog(conf.IPAM.LogFile, conf.IPAM.LogLevel) | ||
| logCall("ADD", args, conf.IPAM) | ||
|
|
||
| // build host-local config | ||
| pool, err := getPoolbyName(conf.IPAM.K8sClient, conf.IPAM.NodeName, conf.IPAM.PoolName) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to get pool by name. %w", err) | ||
| } | ||
|
|
||
| hlc := types.HostLocalNetConfFromNetConfAndPool(conf, pool) | ||
| data, err := json.Marshal(hlc) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to marshal host-local net conf. %w", err) | ||
| } | ||
| log.Debugf("host-local stdin data: %q", string(data)) | ||
|
|
||
| // call host-local cni with alternate path | ||
| err = os.Setenv("CNI_PATH", filepath.Join(conf.IPAM.DataDir, "bin")) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| res, err := ipam.ExecAdd(delegateIPAMPluginName, data) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to exec ADD host-local CNI plugin. %w", err) | ||
| } | ||
|
|
||
| return cnitypes.PrintResult(res, conf.CNIVersion) | ||
| } | ||
|
|
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| func (p *Plugin) CmdDel(args *skel.CmdArgs) error { | ||
| conf, err := types.LoadConf(args.StdinData) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to load config. %w", err) | ||
| } | ||
| setupLog(conf.IPAM.LogFile, conf.IPAM.LogLevel) | ||
| logCall("DEL", args, conf.IPAM) | ||
|
|
||
| // build host-local config | ||
| pool, err := getPoolbyName(conf.IPAM.K8sClient, conf.IPAM.NodeName, conf.IPAM.PoolName) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to get pool by name. %w", err) | ||
| } | ||
|
|
||
| hlc := types.HostLocalNetConfFromNetConfAndPool(conf, pool) | ||
| data, err := json.Marshal(hlc) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to marshal host-local net conf. %w", err) | ||
| } | ||
| log.Debugf("host-local stdin data: %q", string(data)) | ||
|
|
||
| // call host-local cni with alternate path | ||
| err = os.Setenv("CNI_PATH", filepath.Join(conf.IPAM.DataDir, "bin")) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = ipam.ExecDel(delegateIPAMPluginName, data) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to exec DEL host-local CNI plugin. %w", err) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (p *Plugin) CmdCheck(args *skel.CmdArgs) error { | ||
| conf, err := types.LoadConf(args.StdinData) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to load config. %w", err) | ||
| } | ||
| setupLog(conf.IPAM.LogFile, conf.IPAM.LogLevel) | ||
| logCall("CHECK", args, conf.IPAM) | ||
|
|
||
| // build host-local config | ||
| pool, err := getPoolbyName(conf.IPAM.K8sClient, conf.IPAM.NodeName, conf.IPAM.PoolName) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to get pool by name. %w", err) | ||
| } | ||
|
|
||
| hlc := types.HostLocalNetConfFromNetConfAndPool(conf, pool) | ||
| data, err := json.Marshal(hlc) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to marshal host-local net conf. %w", err) | ||
| } | ||
| log.Debugf("host-local stdin data: %q", string(data)) | ||
|
|
||
| // call host-local cni with alternate path | ||
| err = os.Setenv("CNI_PATH", filepath.Join(conf.IPAM.DataDir, "bin")) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = ipam.ExecCheck(delegateIPAMPluginName, data) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to exec CHECK host-local CNI plugin. %w", err) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func setupLog(logFile, logLevel string) { | ||
| if logLevel != "" { | ||
| l := log.StringToLevel(logLevel) | ||
| log.SetLogLevel(l) | ||
| } | ||
|
|
||
| if logFile != "" { | ||
| log.SetLogFile(logFile) | ||
| } | ||
| } | ||
|
|
||
| func logCall(cmd string, args *skel.CmdArgs, conf *types.IPAMConf) { | ||
| log.Infof("CMD %s Call: ContainerID: %s Netns: %s IfName: %s", cmd, args.ContainerID, args.Netns, args.IfName) | ||
| log.Debugf("CMD %s: Args: %s StdinData: %q", cmd, args.Args, string(args.StdinData)) | ||
| log.Debugf("CMD %s: Parsed IPAM conf: %+v", cmd, conf) | ||
| } | ||
|
|
||
| func getPoolbyName(kclient *kubernetes.Clientset, nodeName, poolName string) (*pool.IPPool, error) { | ||
| // get pool info from node | ||
| node, err := kclient.CoreV1().Nodes().Get(context.TODO(), nodeName, metav1.GetOptions{}) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to get node %s from k8s API. %w", nodeName, err) | ||
| } | ||
|
|
||
| pm, err := pool.NewManagerImpl(node) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to get pools from node %s. %w", nodeName, err) | ||
| } | ||
|
|
||
| pool := pm.GetPoolByName(poolName) | ||
| if pool == nil { | ||
| return nil, fmt.Errorf("failed to get pools from node %s. pool %s not found", nodeName, poolName) | ||
| } | ||
| return pool, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| Copyright 2023, NVIDIA CORPORATION & AFFILIATES | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package pool | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
|
|
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| v1 "k8s.io/api/core/v1" | ||
| ) | ||
|
|
||
| const ( | ||
| ipBlocksAnnotation = "ipam.nvidia.com/ip-blocks" | ||
| ) | ||
|
|
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| type IPPool struct { | ||
| Name string | ||
| Subnet string `json:"subnet"` | ||
| StartIP string `json:"startIP"` | ||
| EndIP string `json:"endIP"` | ||
| Gateway string `json:"gateway"` | ||
| } | ||
|
|
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| type Manager interface { | ||
| // GetPoolByName returns IPPool for the provided pool name or nil if pool doesnt exist | ||
| GetPoolByName(name string) *IPPool | ||
| } | ||
|
|
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| type ManagerImpl struct { | ||
| poolByName map[string]*IPPool | ||
| } | ||
|
|
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| func NewManagerImpl(node *v1.Node) (*ManagerImpl, error) { | ||
| if node == nil { | ||
| return nil, fmt.Errorf("nil node provided") | ||
| } | ||
|
|
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| blocks, ok := node.Annotations[ipBlocksAnnotation] | ||
| if !ok { | ||
| return nil, fmt.Errorf("%s node annotation not found", ipBlocksAnnotation) | ||
| } | ||
|
|
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| poolByName := make(map[string]*IPPool) | ||
| err := json.Unmarshal([]byte(blocks), &poolByName) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to parse %s annotation content. %w", ipBlocksAnnotation, err) | ||
| } | ||
|
|
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| for poolName, pool := range poolByName { | ||
| pool.Name = poolName | ||
| } | ||
|
|
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| return &ManagerImpl{ | ||
| poolByName: poolByName, | ||
| }, nil | ||
| } | ||
|
|
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| // GetPoolByName implements Manager interface | ||
| func (pm *ManagerImpl) GetPoolByName(name string) *IPPool { | ||
| return pm.poolByName[name] | ||
| } |
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