Comments (20)
M4t7e
commented on September 22, 2024
8
Hey @byRoadrunner, you're right about your assumption that the current replacement is a hybrid solution. Kube Proxy is still running in background and manages a few functionalities.
I'm currently working on a new PR to update Cilium to the 1.15 release and I can include the full kube-proxy replacement as well. I already have a working setup, but I want to test a few more things. I'll probably file the PR tomorrow.
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lpellegr
commented on September 22, 2024
3
I am getting the same error while simply trying to use cilium with this option:
cni_plugin = "cilium"
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pvtrn
commented on September 22, 2024
3
when I install for the first time with default settings I get the same error
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spmse
commented on September 22, 2024
1
Receiving the same error (see logs) when trying to create a new cluster but without backup_kustomization. As far as I could track it down in the source, this might be related to the presence or absence1 of any values for the remote-exec handler.
1the provisioner has dependencies to multiple values, but also available resources, e.g. load-balancer, or volumes. I could also recognize that some of the csi-nodes seem to be stuck when being created which might be related to the provisioner hanging up. Expand the following section to see code snippet
Details
depends_on = [
hcloud_load_balancer.cluster,
null_resource.control_planes,
random_password.rancher_bootstrap,
hcloud_volume.longhorn_volume
]module.kube-hetzner.null_resource.kustomization: Still creating... [6m0s elapsed]
module.kube-hetzner.null_resource.kustomization: Still creating... [6m10s elapsed]
module.kube-hetzner.null_resource.kustomization (remote-exec): error: timed out waiting for the condition on deployments/system-upgrade-controller
╷
│ Error: remote-exec provisioner error
│
│ with module.kube-hetzner.null_resource.kustomization,
│ on .terraform/modules/kube-hetzner/init.tf line 288, in resource "null_resource" "kustomization":
│ 288: provisioner "remote-exec" {
│
│ error executing "/tmp/terraform_1207280219.sh": Process exited with status 1Although this error occurs, it seems the resources are prepared and the cluster is reachable.
$ k get nodes
NAME STATUS ROLES AGE VERSION
training-shared-cluster-agent-large-bxf Ready <none> 28m v1.28.6+k3s2
training-shared-cluster-agent-large-cnb Ready <none> 28m v1.28.6+k3s2
training-shared-cluster-agent-large-ddd Ready <none> 28m v1.28.6+k3s2
training-shared-cluster-agent-large-iui Ready <none> 28m v1.28.6+k3s2
training-shared-cluster-agent-large-qtp Ready <none> 28m v1.28.6+k3s2
training-shared-cluster-agent-large-ric Ready <none> 28m v1.28.6+k3s2
training-shared-cluster-agent-large-rpr Ready <none> 28m v1.28.6+k3s2
training-shared-cluster-control-plane-fsn1-fdf Ready control-plane,etcd,master 28m v1.28.6+k3s2
training-shared-cluster-control-plane-fsn1-gvp Ready control-plane,etcd,master 27m v1.28.6+k3s2
training-shared-cluster-control-plane-fsn1-uli Ready control-plane,etcd,master 27m v1.28.6+k3s2Other than that, I noticed that on each node there will be an instance of cilium with multiple restarts and 0/1 ready pods:
$ k get pods -n kube-system
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system cilium-9jp8p 1/1 Running 0 27m
kube-system cilium-chbwp 0/1 Running 9 (5m9s ago) 27m
kube-system cilium-czp8w 1/1 Running 0 27m
kube-system cilium-jv7cz 1/1 Running 0 27m
kube-system cilium-mcmft 0/1 Running 8 (33s ago) 27m
kube-system cilium-ns945 1/1 Running 0 27m
kube-system cilium-operator-f5dcdcc8d-prm4z 1/1 Running 0 27m
kube-system cilium-operator-f5dcdcc8d-wpf6n 1/1 Running 0 27m
kube-system cilium-qgtql 1/1 Running 0 27m
kube-system cilium-svjx2 0/1 Running 9 (5m32s ago) 27m
kube-system cilium-t9r7x 1/1 Running 0 27m
kube-system cilium-zsmkr 1/1 Running 0 27mfrom terraform-hcloud-kube-hetzner.
Silvest89
commented on September 22, 2024
1
@byRoadrunner What makes you think that the current implementation with Cilium has kube-proxy? My cluster is kube-proxy-free without the need to use --disable-kube-proxy
@mysticaltech
Haven't had to bootstrap a cluster from scratch in a while :P If it happens even with default settings, it will need to be looked into
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Silvest89
commented on September 22, 2024
1
@byRoadrunner
It's not so long ago that @M4t7e did a rewrite of the cilium part. So yeah it is kube-proxy-free when using Cilium as CNI. No comments when making use of the other CNI's.
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byRoadrunner
commented on September 22, 2024
1
Now I'm getting the same error like before/like the others but with complete default installation (only cni set to cilium).
module.kube-hetzner.null_resource.kustomization (remote-exec): error: timed out waiting for the condition on deployments/system-upgrade-controller
EDIT: Ignore this, it was my fault, i forgot to increase the server_type from the defaults (which is needed for cilium)
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byRoadrunner
commented on September 22, 2024
1
So I just tested and when running iptables-save | grep KUBE-SVC on the node on which the services are running I get the following:
k3s-agent-large-qtr:~ # iptables-save | grep KUBE-SVC
:KUBE-SVC-E3IBCFULSWKQCT47 - [0:0]
:KUBE-SVC-ERIFXISQEP7F7OF4 - [0:0]
:KUBE-SVC-JD5MR3NA4I4DYORP - [0:0]
:KUBE-SVC-L65ENXXZWWSAPRCR - [0:0]
:KUBE-SVC-LODJXQNF3DWSNB7B - [0:0]
:KUBE-SVC-NPX46M4PTMTKRN6Y - [0:0]
:KUBE-SVC-RY6ZSH2GAUYGLHMF - [0:0]
:KUBE-SVC-TCOU7JCQXEZGVUNU - [0:0]
:KUBE-SVC-UIRTXPNS5NKAPNTY - [0:0]
:KUBE-SVC-UZ2GNDIHHRV7XITW - [0:0]
:KUBE-SVC-Z4ANX4WAEWEBLCTM - [0:0]
:KUBE-SVC-ZUD4L6KQKCHD52W4 - [0:0]
-A KUBE-EXT-L65ENXXZWWSAPRCR -j KUBE-SVC-L65ENXXZWWSAPRCR
-A KUBE-EXT-LODJXQNF3DWSNB7B -j KUBE-SVC-LODJXQNF3DWSNB7B
-A KUBE-EXT-UIRTXPNS5NKAPNTY -j KUBE-SVC-UIRTXPNS5NKAPNTY
-A KUBE-SERVICES -d 10.43.0.10/32 -p tcp -m comment --comment "kube-system/kube-dns:dns-tcp cluster IP" -m tcp --dport 53 -j KUBE-SVC-ERIFXISQEP7F7OF4
-A KUBE-SERVICES -d 10.43.0.10/32 -p tcp -m comment --comment "kube-system/kube-dns:metrics cluster IP" -m tcp --dport 9153 -j KUBE-SVC-JD5MR3NA4I4DYORP
-A KUBE-SERVICES -d 10.43.0.10/32 -p udp -m comment --comment "kube-system/kube-dns:dns cluster IP" -m udp --dport 53 -j KUBE-SVC-TCOU7JCQXEZGVUNU
-A KUBE-SERVICES -d 10.43.188.115/32 -p tcp -m comment --comment "kube-system/hcloud-csi-controller-metrics:metrics cluster IP" -m tcp --dport 9189 -j KUBE-SVC-RY6ZSH2GAUYGLHMF
-A KUBE-SERVICES -d 10.43.33.175/32 -p tcp -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics cluster IP" -m tcp --dport 9189 -j KUBE-SVC-UZ2GNDIHHRV7XITW
-A KUBE-SERVICES -d 10.43.186.42/32 -p tcp -m comment --comment "traefik/traefik:web cluster IP" -m tcp --dport 80 -j KUBE-SVC-UIRTXPNS5NKAPNTY
-A KUBE-SERVICES -d 10.43.186.42/32 -p tcp -m comment --comment "traefik/traefik:websecure cluster IP" -m tcp --dport 443 -j KUBE-SVC-LODJXQNF3DWSNB7B
-A KUBE-SERVICES -d 10.43.132.82/32 -p tcp -m comment --comment "cert-manager/cert-manager-webhook:https cluster IP" -m tcp --dport 443 -j KUBE-SVC-ZUD4L6KQKCHD52W4
-A KUBE-SERVICES -d 10.43.91.27/32 -p tcp -m comment --comment "cert-manager/cert-manager:tcp-prometheus-servicemonitor cluster IP" -m tcp --dport 9402 -j KUBE-SVC-E3IBCFULSWKQCT47
-A KUBE-SERVICES -d 10.43.33.192/32 -p tcp -m comment --comment "kube-system/metrics-server:https cluster IP" -m tcp --dport 443 -j KUBE-SVC-Z4ANX4WAEWEBLCTM
-A KUBE-SERVICES -d 10.43.0.1/32 -p tcp -m comment --comment "default/kubernetes:https cluster IP" -m tcp --dport 443 -j KUBE-SVC-NPX46M4PTMTKRN6Y
-A KUBE-SERVICES -d 10.43.252.212/32 -p tcp -m comment --comment "default/my-nginx cluster IP" -m tcp --dport 80 -j KUBE-SVC-L65ENXXZWWSAPRCR
-A KUBE-SVC-E3IBCFULSWKQCT47 ! -s 10.42.0.0/16 -d 10.43.91.27/32 -p tcp -m comment --comment "cert-manager/cert-manager:tcp-prometheus-servicemonitor cluster IP" -m tcp --dport 9402 -j KUBE-MARK-MASQ
-A KUBE-SVC-E3IBCFULSWKQCT47 -m comment --comment "cert-manager/cert-manager:tcp-prometheus-servicemonitor -> 10.42.0.46:9402" -j KUBE-SEP-I2YMRF6X5XNTHNZY
-A KUBE-SVC-ERIFXISQEP7F7OF4 ! -s 10.42.0.0/16 -d 10.43.0.10/32 -p tcp -m comment --comment "kube-system/kube-dns:dns-tcp cluster IP" -m tcp --dport 53 -j KUBE-MARK-MASQ
-A KUBE-SVC-ERIFXISQEP7F7OF4 -m comment --comment "kube-system/kube-dns:dns-tcp -> 10.42.5.127:53" -j KUBE-SEP-YJQITTE5EFTFYMQA
-A KUBE-SVC-JD5MR3NA4I4DYORP ! -s 10.42.0.0/16 -d 10.43.0.10/32 -p tcp -m comment --comment "kube-system/kube-dns:metrics cluster IP" -m tcp --dport 9153 -j KUBE-MARK-MASQ
-A KUBE-SVC-JD5MR3NA4I4DYORP -m comment --comment "kube-system/kube-dns:metrics -> 10.42.5.127:9153" -j KUBE-SEP-UQZEKWHFV7M5EZRG
-A KUBE-SVC-L65ENXXZWWSAPRCR ! -s 10.42.0.0/16 -d 10.43.252.212/32 -p tcp -m comment --comment "default/my-nginx cluster IP" -m tcp --dport 80 -j KUBE-MARK-MASQ
-A KUBE-SVC-L65ENXXZWWSAPRCR -m comment --comment "default/my-nginx -> 10.42.0.29:80" -m statistic --mode random --probability 0.50000000000 -j KUBE-SEP-7GYOAUIAMQUOKVDR
-A KUBE-SVC-L65ENXXZWWSAPRCR -m comment --comment "default/my-nginx -> 10.42.4.79:80" -j KUBE-SEP-IIS32MVGMNZKV3T6
-A KUBE-SVC-LODJXQNF3DWSNB7B ! -s 10.42.0.0/16 -d 10.43.186.42/32 -p tcp -m comment --comment "traefik/traefik:websecure cluster IP" -m tcp --dport 443 -j KUBE-MARK-MASQ
-A KUBE-SVC-LODJXQNF3DWSNB7B -m comment --comment "traefik/traefik:websecure -> 10.42.0.145:8443" -m statistic --mode random --probability 0.33333333349 -j KUBE-SEP-CB7E2YRDT4Z4QBTW
-A KUBE-SVC-LODJXQNF3DWSNB7B -m comment --comment "traefik/traefik:websecure -> 10.42.3.82:8443" -m statistic --mode random --probability 0.50000000000 -j KUBE-SEP-YIDA72PITHMP23YL
-A KUBE-SVC-LODJXQNF3DWSNB7B -m comment --comment "traefik/traefik:websecure -> 10.42.5.85:8443" -j KUBE-SEP-FBV2XYRHLSEUTYAL
-A KUBE-SVC-NPX46M4PTMTKRN6Y ! -s 10.42.0.0/16 -d 10.43.0.1/32 -p tcp -m comment --comment "default/kubernetes:https cluster IP" -m tcp --dport 443 -j KUBE-MARK-MASQ
-A KUBE-SVC-NPX46M4PTMTKRN6Y -m comment --comment "default/kubernetes:https -> 10.253.0.101:6443" -m statistic --mode random --probability 0.33333333349 -j KUBE-SEP-DYW6NS6B3Z6DCBYV
-A KUBE-SVC-NPX46M4PTMTKRN6Y -m comment --comment "default/kubernetes:https -> 10.254.0.101:6443" -m statistic --mode random --probability 0.50000000000 -j KUBE-SEP-C4RBGSB4EWYWEBUX
-A KUBE-SVC-NPX46M4PTMTKRN6Y -m comment --comment "default/kubernetes:https -> 10.255.0.101:6443" -j KUBE-SEP-4VCRLYVIMEEKDPZE
-A KUBE-SVC-RY6ZSH2GAUYGLHMF ! -s 10.42.0.0/16 -d 10.43.188.115/32 -p tcp -m comment --comment "kube-system/hcloud-csi-controller-metrics:metrics cluster IP" -m tcp --dport 9189 -j KUBE-MARK-MASQ
-A KUBE-SVC-RY6ZSH2GAUYGLHMF -m comment --comment "kube-system/hcloud-csi-controller-metrics:metrics -> 10.42.5.54:9189" -j KUBE-SEP-66GUL3YV6P7YZ4PQ
-A KUBE-SVC-TCOU7JCQXEZGVUNU ! -s 10.42.0.0/16 -d 10.43.0.10/32 -p udp -m comment --comment "kube-system/kube-dns:dns cluster IP" -m udp --dport 53 -j KUBE-MARK-MASQ
-A KUBE-SVC-TCOU7JCQXEZGVUNU -m comment --comment "kube-system/kube-dns:dns -> 10.42.5.127:53" -j KUBE-SEP-EOVD533DIZYTLRLX
-A KUBE-SVC-UIRTXPNS5NKAPNTY ! -s 10.42.0.0/16 -d 10.43.186.42/32 -p tcp -m comment --comment "traefik/traefik:web cluster IP" -m tcp --dport 80 -j KUBE-MARK-MASQ
-A KUBE-SVC-UIRTXPNS5NKAPNTY -m comment --comment "traefik/traefik:web -> 10.42.0.145:8000" -m statistic --mode random --probability 0.33333333349 -j KUBE-SEP-7GIJ33LAD7V5FOMW
-A KUBE-SVC-UIRTXPNS5NKAPNTY -m comment --comment "traefik/traefik:web -> 10.42.3.82:8000" -m statistic --mode random --probability 0.50000000000 -j KUBE-SEP-EF5ZOLPEVQ6KPKV5
-A KUBE-SVC-UIRTXPNS5NKAPNTY -m comment --comment "traefik/traefik:web -> 10.42.5.85:8000" -j KUBE-SEP-KEEKTLA2JCCDM4TY
-A KUBE-SVC-UZ2GNDIHHRV7XITW ! -s 10.42.0.0/16 -d 10.43.33.175/32 -p tcp -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics cluster IP" -m tcp --dport 9189 -j KUBE-MARK-MASQ
-A KUBE-SVC-UZ2GNDIHHRV7XITW -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics -> 10.42.0.227:9189" -m statistic --mode random --probability 0.12500000000 -j KUBE-SEP-OTIHTLUJMKCO6SJF
-A KUBE-SVC-UZ2GNDIHHRV7XITW -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics -> 10.42.1.23:9189" -m statistic --mode random --probability 0.14285714272 -j KUBE-SEP-JPR2HJKAN3EI7DKT
-A KUBE-SVC-UZ2GNDIHHRV7XITW -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics -> 10.42.2.97:9189" -m statistic --mode random --probability 0.16666666651 -j KUBE-SEP-LGKW3HMYZ2EVIUFP
-A KUBE-SVC-UZ2GNDIHHRV7XITW -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics -> 10.42.3.55:9189" -m statistic --mode random --probability 0.20000000019 -j KUBE-SEP-OWAFQ4MLCJKHS6VS
-A KUBE-SVC-UZ2GNDIHHRV7XITW -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics -> 10.42.4.67:9189" -m statistic --mode random --probability 0.25000000000 -j KUBE-SEP-WXXIE2DBZOKGLXOH
-A KUBE-SVC-UZ2GNDIHHRV7XITW -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics -> 10.42.5.96:9189" -m statistic --mode random --probability 0.33333333349 -j KUBE-SEP-H6Q4WP6KZPHOWVUC
-A KUBE-SVC-UZ2GNDIHHRV7XITW -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics -> 10.42.6.191:9189" -m statistic --mode random --probability 0.50000000000 -j KUBE-SEP-YL5OSEYGQQS3VPSO
-A KUBE-SVC-UZ2GNDIHHRV7XITW -m comment --comment "kube-system/hcloud-csi-node-metrics:metrics -> 10.42.7.160:9189" -j KUBE-SEP-N5CVT4WDXUVTBOM4
-A KUBE-SVC-Z4ANX4WAEWEBLCTM ! -s 10.42.0.0/16 -d 10.43.33.192/32 -p tcp -m comment --comment "kube-system/metrics-server:https cluster IP" -m tcp --dport 443 -j KUBE-MARK-MASQ
-A KUBE-SVC-Z4ANX4WAEWEBLCTM -m comment --comment "kube-system/metrics-server:https -> 10.42.5.140:10250" -j KUBE-SEP-ELRRLVYKTAQW7W2Q
-A KUBE-SVC-ZUD4L6KQKCHD52W4 ! -s 10.42.0.0/16 -d 10.43.132.82/32 -p tcp -m comment --comment "cert-manager/cert-manager-webhook:https cluster IP" -m tcp --dport 443 -j KUBE-MARK-MASQ
-A KUBE-SVC-ZUD4L6KQKCHD52W4 -m comment --comment "cert-manager/cert-manager-webhook:https -> 10.42.3.106:10250" -j KUBE-SEP-RTVYB7WCGOMJZGQE
But according to Cilium documentation (https://docs.cilium.io/en/stable/network/kubernetes/kubeproxy-free/#validate-the-setup) this should just return an empty line.
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byRoadrunner
commented on September 22, 2024
1
@mysticaltech kube-proxy replacement is already the default in the helm values which are deployed (
terraform-hcloud-kube-hetzner/locals.tf
Line 383 in e911232
You are right about the part that it says KubeProxyReplacement: True when entering cilium status. But thats not the problem I'm having.
In my previous comments i mentioned the hybrid mode and the validation steps provided by cilium, and if there are still KUBE-SVC rules in ip-tables there is something not right. And then we would be running in hybrid mode, which I dont want.
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byRoadrunner
commented on September 22, 2024
1
@M4t7e works like a charm, no more KUBE-SVC rules, thanks!
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mysticaltech
commented on September 22, 2024
@M4t7e @Silvest89 Any ideas this issue?
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byRoadrunner
commented on September 22, 2024
@Silvest89
At the last time when I checked it with this validation part (https://docs.cilium.io/en/stable/network/kubernetes/kubeproxy-free/#validate-the-setup) I still got an iptables result. This led me to the conclusion that the cluster is still running with kube-proxy coexisting (https://docs.cilium.io/en/stable/network/kubernetes/kubeproxy-free/#kube-proxy-hybrid-modes). If I made some mistake feel free to correct me, but I want the completely standalone mode, if that's possible.
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Silvest89
commented on September 22, 2024
@byRoadrunner
There is no kube-proxy POD, so it means your system is kube-proxy free. Where did you execute the iptables the command? On your own computer? :P
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byRoadrunner
commented on September 22, 2024
@Silvest89 definitely not on my own computer 😉
It's some time ago since I tested so I can't remember the exact details, I will try to test again this evening. But did you check the iptables rules on your system?
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mysticaltech
commented on September 22, 2024
@Silvest89 Thanks for the clarifications, will have a look.
@kube-hetzner/core FYi, if you have any ideas.
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byRoadrunner
commented on September 22, 2024
@byRoadrunner It's not so long ago that @M4t7e did a rewrite of the cilium part. So yeah it is kube-proxy-free when using Cilium as CNI. No comments when making use of the other CNI's.
I definitely used the latest available version for this testing, which was, and still is, v2.11.8.
It was not about the kube proxy replacement not working. It was about the iptables rules still present which should not be the case if using full kube-proxy replacement mode.
iptables-save | grep KUBE-SVC
This still returned rules if I had a NodePort Service running on the cluster.
Anyways I will test this evening if I did a mistake or if I can still replicate this behaviour. As soon as I know more i will post a follow up 👍
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byRoadrunner
commented on September 22, 2024
@Silvest89 just to clarify, a standard installation with just changing the cni to cilium should be kube-proxy free?
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Silvest89
commented on September 22, 2024
@Silvest89 just to clarify, a standard installation with just changing the cni to cilium should be kube-proxy free?
Yes.
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mysticaltech
commented on September 22, 2024
@byRoadrunner How do you do the kube-proxy replacement? Via the cilium_values var? It should be done there! See the cilium-values.yaml for the options available, you can find the link in kube.tf.example.
Then look at the examples section in the readme about how to get info about the cilium install, it should say kube-proxy free mode or something when you run that.
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mysticaltech
commented on September 22, 2024
Great to hear from you @M4t7e 🙏
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JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
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web
Some thing interesting about web. New door for the world.
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server
A server is a program made to process requests and deliver data to clients.
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Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
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Visualization
Some thing interesting about visualization, use data art
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Game
Some thing interesting about game, make everyone happy.
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Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
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Microsoft
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Google
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Alibaba
Alibaba Open Source for everyone
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D3
Data-Driven Documents codes.
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Tencent
China tencent open source team.
from terraform-hcloud-kube-hetzner.