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Merge pull request #119 from aojea/podiups
api: add support for reading Pod IPs
2 parents edfd91b + eaf78a9 commit 6d486ac

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‎pkg/api/api.pb.go‎

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‎pkg/api/api.proto‎

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@@ -228,6 +228,7 @@ message PodSandbox {
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string runtime_handler = 7;
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LinuxPodSandbox linux = 8;
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uint32 pid = 9; // for NRI v1 emulation
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repeated string ips = 10;
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}
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// PodSandbox linux-specific metadata

‎plugins/network-logger/README.md‎

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## NRI Network logger Plugin
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The network logger plugin logs the network parameters of Pods, specifically
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the Pod IPs assigned by the CNI plugin and the network namespace of the Pod.
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The provided network logger NRI plugin serves as a reference implementation,
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showcasing non-disruptive integration with container runtimes and CNI plugins.
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### The Kubernetes network model
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The Kubernetes network model is implemented by the container runtime on each node.
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The most common container runtimes use Container Network Interface (CNI) plugins
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to manage their network and security capabilities.
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Before starting a pod, kubelet calls RuntimeService.RunPodSandbox to create the environment.
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This includes setting up networking for a pod (e.g., allocating an IP).
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Once the PodSandbox is active, individual containers can be created/started/stopped/removed independently.
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To delete the pod, kubelet will stop and remove containers before stopping and removing the PodSandbox
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and releasing the network resources (e.g., releasing the IP).
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### NRI Pod Lifecycle events
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NRI plugins can subscribe to the following Pod lifecycle events that are of interest to
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integrations with Kubernetes and depend on the Pod networking characteristics.
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- RunPodSandbox: It happens after the Linux network namespace has been created and the CNI
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plugin has created the network interface and allocated the IPs.
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- StopPodSandbox: It happens before the CNI plugin removes the network interface and releases the IPs.
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- RemovePodSandbox: It happens after all the network resources were released.
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## Testing
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You can test this plugin using a kubernetes cluster/node with a container
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runtime that has NRI support enabled.
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Start the plugin on the target node (`network-logger -idx 10`) and it will start
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logging all the networking related events and the Pod IPs and network namespaces.
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```
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./network-logger -idx 10
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INFO [0000] Created plugin 10-network-logger (network-logger, handles RunPodSandbox,StopPodSandbox,RemovePodSandbox)
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INFO [0000] Registering plugin 10-network-logger...
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INFO [0000] Configuring plugin 10-network-logger for runtime v2/v2.0.0-rc.5-110-g5e084bdc6...
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INFO [0000] Started plugin 10-network-logger...
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INFO [0000] Synchronized state with the runtime (6 pods, 5 containers)...
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INFO [0000] pod default/webapp: namespace=/var/run/netns/cni-d3f41d35-dde9-382d-9502-3cb05c99543a ips=[10.244.1.22]
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INFO [0000] pod ingress-nginx/ingress-nginx-controller-7d8d8c7b4c-dz7f8: namespace=<host-network> ips=[10.244.1.7]
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INFO [0000] pod kube-system/kube-proxy-cvlfm: namespace=<host-network> ips=[]
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INFO [0000] pod default/test3: namespace=/var/run/netns/cni-a2492a06-3efc-bec3-b180-0a83411b7311 ips=[10.244.1.20]
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INFO [0000] pod kube-system/kube-network-policies-996zs: namespace=<host-network> ips=[]
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INFO [0000] pod ingress-nginx/ingress-nginx-controller-7d8d8c7b4c-dz7f8: namespace=/var/run/netns/cni-7a78a743-c4db-7790-0f38-7e6f8f945d42 ips=[10.244.1.4]
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INFO [0027] Started pod default/test-nri-1: namespace=/var/run/netns/cni-2b46640c-8073-214b-77ae-fdebdcd7c223 ips=[10.244.1.24]
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INFO [0038] Stopped pod default/test-nri-1: ips=[10.244.1.24]
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INFO [0047] Removed pod default/test-nri-1: ips=[10.244.1.24]
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```

‎plugins/network-logger/go.mod‎

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module github.com/containerd/nri/plugins/network-logger
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go 1.21
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require (
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github.com/containerd/nri v0.6.1
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github.com/sirupsen/logrus v1.9.3
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)
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require (
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github.com/containerd/log v0.1.0 // indirect
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github.com/containerd/ttrpc v1.2.6-0.20240827082320-b5cd6e4b3287 // indirect
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github.com/gogo/protobuf v1.3.2 // indirect
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github.com/golang/protobuf v1.5.3 // indirect
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github.com/opencontainers/runtime-spec v1.0.3-0.20220825212826-86290f6a00fb // indirect
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golang.org/x/net v0.25.0 // indirect
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golang.org/x/sys v0.21.0 // indirect
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golang.org/x/text v0.15.0 // indirect
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google.golang.org/genproto/googleapis/rpc v0.0.0-20230731190214-cbb8c96f2d6d // indirect
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google.golang.org/grpc v1.57.1 // indirect
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google.golang.org/protobuf v1.34.1 // indirect
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k8s.io/cri-api v0.25.3 // indirect
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)
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replace github.com/containerd/nri => ../..

‎plugins/network-logger/go.sum‎

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github.com/containerd/log v0.1.0 h1:TCJt7ioM2cr/tfR8GPbGf9/VRAX8D2B4PjzCpfX540I=
2+
github.com/containerd/log v0.1.0/go.mod h1:VRRf09a7mHDIRezVKTRCrOq78v577GXq3bSa3EhrzVo=
3+
github.com/containerd/ttrpc v1.2.6-0.20240827082320-b5cd6e4b3287 h1:zwv64tCdT888KxuXQuv5i36cEdljoXq3sVqLmOEbCQI=
4+
github.com/containerd/ttrpc v1.2.6-0.20240827082320-b5cd6e4b3287/go.mod h1:YCXHsb32f+Sq5/72xHubdiJRQY9inL4a4ZQrAbN1q9o=
5+
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
6+
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
7+
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
8+
github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
9+
github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
10+
github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1vB6EwHI=
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github.com/go-task/slim-sprig/v3 v3.0.0/go.mod h1:W848ghGpv3Qj3dhTPRyJypKRiqCdHZiAzKg9hl15HA8=
12+
github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
13+
github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
14+
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
15+
github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
16+
github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
17+
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
18+
github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
19+
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
20+
github.com/google/pprof v0.0.0-20240424215950-a892ee059fd6 h1:k7nVchz72niMH6YLQNvHSdIE7iqsQxK1P41mySCvssg=
21+
github.com/google/pprof v0.0.0-20240424215950-a892ee059fd6/go.mod h1:kf6iHlnVGwgKolg33glAes7Yg/8iWP8ukqeldJSO7jw=
22+
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
23+
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
24+
github.com/onsi/ginkgo/v2 v2.19.1 h1:QXgq3Z8Crl5EL1WBAC98A5sEBHARrAJNzAmMxzLcRF0=
25+
github.com/onsi/ginkgo/v2 v2.19.1/go.mod h1:O3DtEWQkPa/F7fBMgmZQKKsluAy8pd3rEQdrjkPb9zA=
26+
github.com/onsi/gomega v1.34.0 h1:eSSPsPNp6ZpsG8X1OVmOTxig+CblTc4AxpPBykhe2Os=
27+
github.com/onsi/gomega v1.34.0/go.mod h1:MIKI8c+f+QLWk+hxbePD4i0LMJSExPaZOVfkoex4cAo=
28+
github.com/opencontainers/runtime-spec v1.0.3-0.20220825212826-86290f6a00fb h1:1xSVPOd7/UA+39/hXEGnBJ13p6JFB0E1EvQFlrRDOXI=
29+
github.com/opencontainers/runtime-spec v1.0.3-0.20220825212826-86290f6a00fb/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
30+
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
32+
github.com/prometheus/procfs v0.6.0 h1:mxy4L2jP6qMonqmq+aTtOx1ifVWUgG/TAmntgbh3xv4=
33+
github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
34+
github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
35+
github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
36+
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
37+
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
38+
github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
39+
github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
40+
github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
41+
github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
42+
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
43+
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
44+
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
45+
golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
46+
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
47+
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
48+
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
49+
golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
50+
golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
51+
golang.org/x/net v0.25.0 h1:d/OCCoBEUq33pjydKrGQhw7IlUPI2Oylr+8qLx49kac=
52+
golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
53+
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
54+
golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
55+
golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
56+
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
57+
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
58+
golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
59+
golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
60+
golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
61+
golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
62+
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
63+
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
64+
golang.org/x/text v0.15.0 h1:h1V/4gjBv8v9cjcR6+AR5+/cIYK5N/WAgiv4xlsEtAk=
65+
golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
66+
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
67+
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
68+
golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
69+
golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
70+
golang.org/x/tools v0.21.0 h1:qc0xYgIbsSDt9EyWz05J5wfa7LOVW0YTLOXrqdLAWIw=
71+
golang.org/x/tools v0.21.0/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
72+
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
73+
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
74+
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
75+
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
76+
google.golang.org/genproto/googleapis/rpc v0.0.0-20230731190214-cbb8c96f2d6d h1:pgIUhmqwKOUlnKna4r6amKdUngdL8DrkpFeV8+VBElY=
77+
google.golang.org/genproto/googleapis/rpc v0.0.0-20230731190214-cbb8c96f2d6d/go.mod h1:TUfxEVdsvPg18p6AslUXFoLdpED4oBnGwyqk3dV1XzM=
78+
google.golang.org/grpc v1.57.1 h1:upNTNqv0ES+2ZOOqACwVtS3Il8M12/+Hz41RCPzAjQg=
79+
google.golang.org/grpc v1.57.1/go.mod h1:Sd+9RMTACXwmub0zcNY2c4arhtrbBYD1AUHI/dt16Mo=
80+
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
81+
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
82+
google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
83+
google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
84+
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
85+
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
86+
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
87+
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
88+
k8s.io/cri-api v0.25.3 h1:YaiQ05CM4+5L2DAz0KoSa4sv4/VlQvLbf3WHKICPSXs=
89+
k8s.io/cri-api v0.25.3/go.mod h1:riC/P0yOGUf2K1735wW+CXs1aY2ctBgePtnnoFLd0dU=

‎plugins/network-logger/plugin.go‎

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/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"context"
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"flag"
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"os"
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"github.com/sirupsen/logrus"
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"github.com/containerd/nri/pkg/api"
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"github.com/containerd/nri/pkg/stub"
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)
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type plugin struct {
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stub stub.Stub
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mask stub.EventMask
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}
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var (
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log *logrus.Logger
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)
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func getNetworkNamespace(pod *api.PodSandbox) string {
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// get the pod network namespace
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for _, namespace := range pod.Linux.GetNamespaces() {
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if namespace.Type == "network" {
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return namespace.Path
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}
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}
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return "<host-network>"
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}
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func (p *plugin) Synchronize(_ context.Context, pods []*api.PodSandbox, containers []*api.Container) ([]*api.ContainerUpdate, error) {
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log.Infof("Synchronized state with the runtime (%d pods, %d containers)...",
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len(pods), len(containers))
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for _, pod := range pods {
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log.Infof("pod %s/%s: namespace=%s ips=%v", pod.GetNamespace(), pod.GetName(), getNetworkNamespace(pod), pod.GetIps())
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}
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return nil, nil
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}
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func (p *plugin) Shutdown(_ context.Context) {
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log.Info("Runtime shutting down...")
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}
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func (p *plugin) RunPodSandbox(_ context.Context, pod *api.PodSandbox) error {
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log.Infof("Started pod %s/%s: namespace=%s ips=%v", pod.GetNamespace(), pod.GetName(), getNetworkNamespace(pod), pod.GetIps())
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return nil
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}
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func (p *plugin) StopPodSandbox(_ context.Context, pod *api.PodSandbox) error {
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log.Infof("Stopped pod %s/%s: ips=%v", pod.GetNamespace(), pod.GetName(), pod.GetIps())
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return nil
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}
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func (p *plugin) RemovePodSandbox(_ context.Context, pod *api.PodSandbox) error {
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log.Infof("Removed pod %s/%s: ips=%v", pod.GetNamespace(), pod.GetName(), pod.GetIps())
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return nil
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}
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func (p *plugin) onClose() {
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log.Infof("Connection to the runtime lost, exiting...")
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os.Exit(0)
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}
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func main() {
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var (
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pluginName string
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pluginIdx string
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err error
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)
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log = logrus.StandardLogger()
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log.SetFormatter(&logrus.TextFormatter{
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PadLevelText: true,
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})
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flag.StringVar(&pluginName, "network-logger", "", "plugin name to register to NRI")
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flag.StringVar(&pluginIdx, "idx", "", "plugin index to register to NRI")
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flag.Parse()
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p := &plugin{}
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opts := []stub.Option{
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stub.WithOnClose(p.onClose),
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}
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if pluginName != "" {
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opts = append(opts, stub.WithPluginName(pluginName))
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}
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if pluginIdx != "" {
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opts = append(opts, stub.WithPluginIdx(pluginIdx))
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}
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if p.stub, err = stub.New(p, opts...); err != nil {
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log.Fatalf("failed to create plugin stub: %v", err)
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}
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if err = p.stub.Run(context.Background()); err != nil {
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log.Errorf("plugin exited (%v)", err)
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os.Exit(1)
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}
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}

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