Remplacer MetalLB par Cilium BGP pour la mise en œuvre d’un équilibreur de charge dans Kubernetes …
Cilium est un logiciel open source permettant de sécuriser de manière transparente la connectivité réseau entre les services applicatifs déployés à l’aide de plateformes de gestion de conteneurs Linux comme Docker et Kubernetes.
À la base de Cilium se trouve une nouvelle technologie du noyau Linux appelée eBPF, qui permet l’insertion dynamique d’une puissante logique de visibilité et de contrôle de la sécurité au sein même de Linux. Comme eBPF s’exécute à l’intérieur du noyau Linux, les politiques de sécurité de Cilium peuvent être appliquées et mises à jour sans aucune modification du code de l’application ou de la configuration du conteneur.
BGP fournit un moyen d’annoncer des routes à l’aide de protocoles de réseau traditionnels pour permettre aux services gérés par Cilium d’être accessibles en dehors du cluster. Ici on va voir comment configurer la prise en charge native de Cilium pour annoncer les IP des services de l’équilibreur de charge et la plage CIDR de Pod d’un nœud Kubernetes via BGP.
Il s’appuie sur l’implémentation simple et efficace de l’allocation d’IP de MetalLB et sur le support minimal du protocole BGP pour ce faire. La configuration de Cilium est la même que celle de MetalLB. Cette fonctionnalité demeure encore en version beta :
Plus précisément, si un service de type LoadBalancer est créé, Cilium lui allouera une IP à partir d’un pool spécifié. Une fois l’IP allouée, les agents annonceront via BGP en fonction de la ExternalTrafficPolicy du service. Application ici avec le lancement d’une instance dans Linode (maintenant Akamai) avec Ubuntu 22.04 LTS :
linode-cli linodes create \
--image 'linode/ubuntu22.04' \
--region eu-central \
--type g7-highmem-1 \
--label lxdserver\
--authorized_users $USER\
--booted true \
--backups_enabled false \
--private_ip false
Installation de l’hyperviseur LXD sur cette instance Ubuntu 22.04 LTS :
root@localhost:~# snap install lxd
2023-03-01T19:27:40Z INFO Waiting for automatic snapd restart...
lxd 5.11-ad0b61e from Canonical✓ installed
root@localhost:~# lxd init
Would you like to use LXD clustering? (yes/no) [default=no]:
Do you want to configure a new storage pool? (yes/no) [default=yes]:
Name of the new storage pool [default=default]:
Name of the storage backend to use (lvm, zfs, btrfs, ceph, dir) [default=zfs]: dir
Would you like to connect to a MAAS server? (yes/no) [default=no]:
Would you like to create a new local network bridge? (yes/no) [default=yes]:
What should the new bridge be called? [default=lxdbr0]:
What IPv4 address should be used? (CIDR subnet notation, “auto” or “none”) [default=auto]:
What IPv6 address should be used? (CIDR subnet notation, “auto” or “none”) [default=auto]: none
Would you like the LXD server to be available over the network? (yes/no) [default=no]:
Would you like stale cached images to be updated automatically? (yes/no) [default=yes]:
Would you like a YAML "lxd init" preseed to be printed? (yes/no) [default=no]:
root@localhost:~# lxc ls
To start your first container, try: lxc launch ubuntu:22.04
Or for a virtual machine: lxc launch ubuntu:22.04 --vm
+------+-------+------+------+------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+------+-------+------+------+------+-----------+Configuration du profil par défaut dans LXD :
root@localhost:~# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa
Your public key has been saved in /root/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:Nk0YMZ5JM5i5EMOjZ/YTJ+GiWNTOhv/9jhLtVAz7f8k root@localhost
The key's randomart image is:
+---[RSA 3072]----+
| oo. +B. |
| . =.=o.O |
| . = + o=+. |
| + O = ooo |
| o B o =So. |
|. . . +.o.. |
| . * . . . |
| o o. . E |
| ..oo . |
+----[SHA256]-----+
root@localhost:~# lxc profile show default > lxd-profile-default.yaml
root@localhost:~# cat lxd-profile-default.yaml
config:
user.user-data: |
#cloud-config
ssh_authorized_keys:
- @@SSHPUB@@
environment.http_proxy: ""
user.network_mode: ""
description: Default LXD profile
devices:
eth0:
name: eth0
network: lxdbr0
type: nic
root:
path: /
pool: default
type: disk
name: default
used_by: []
root@localhost:~# sed -ri "s'@@SSHPUB@@'$(cat ~/.ssh/id_rsa.pub)'" lxd-profile-default.yaml
root@localhost:~# lxc profile edit default < lxd-profile-default.yamlet d’un profil dédié pour l”installation de Kubernetes :
root@localhost:~# lxc profile create k8s
Profile k8s created
root@localhost:~# wget https://raw.githubusercontent.com/ubuntu/microk8s/master/tests/lxc/microk8s.profile -O microk8s.profile
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 2606:50c0:8000::154, 2606:50c0:8001::154, 2606:50c0:8002::154, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|2606:50c0:8000::154|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 816 [text/plain]
Saving to: ‘microk8s.profile’
microk8s.profile 100%[=============================================================================================>] 816 --.-KB/s in 0s
root@localhost:~# cat microk8s.profile | lxc profile edit k8s
root@localhost:~# rm microk8s.profileLancement de trois instances LXC avec Ubuntu 22.04 LTS et de ce profil k8s :
root@localhost:~# for i in {1..3}; do lxc launch -p default -p k8s ubuntu:22.04 k3s$i; done
Creating k3s1
Starting k3s1
Creating k3s2
Starting k3s2
Creating k3s3
Starting k3s3
root@localhost:~# lxc ls
+------+---------+---------------------+------+-----------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+------+---------+---------------------+------+-----------+-----------+
| k3s1 | RUNNING | 10.26.23.163 (eth0) | | CONTAINER | 0 |
+------+---------+---------------------+------+-----------+-----------+
| k3s2 | RUNNING | 10.26.23.75 (eth0) | | CONTAINER | 0 |
+------+---------+---------------------+------+-----------+-----------+
| k3s3 | RUNNING | 10.26.23.87 (eth0) | | CONTAINER | 0 |
+------+---------+---------------------+------+-----------+-----------+Je procède à l’installation d’un cluster k3s conformément à ce que préconise la documentation fournie par Cilium.
La première étape consiste en effet à installer un nœud maître K3s en veillant à désactiver la prise en charge du plugin CNI par défaut et de l’applicateur de politique réseau intégré :
root@localhost:~# ssh ubuntu@10.26.23.163
Warning: Permanently added '10.26.23.163' (ED25519) to the list of known hosts.
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
ubuntu@k3s1:~$ curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC='--flannel-backend=none --disable-network-policy' sh -
[INFO] Finding release for channel stable
[INFO] Using v1.25.6+k3s1 as release
[INFO] Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.25.6+k3s1/sha256sum-amd64.txt
[INFO] Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.25.6+k3s1/k3s
[INFO] Verifying binary download
[INFO] Installing k3s to /usr/local/bin/k3s
[INFO] Skipping installation of SELinux RPM
[INFO] Creating /usr/local/bin/kubectl symlink to k3s
[INFO] Creating /usr/local/bin/crictl symlink to k3s
[INFO] Creating /usr/local/bin/ctr symlink to k3s
[INFO] Creating killall script /usr/local/bin/k3s-killall.sh
[INFO] Creating uninstall script /usr/local/bin/k3s-uninstall.sh
[INFO] env: Creating environment file /etc/systemd/system/k3s.service.env
[INFO] systemd: Creating service file /etc/systemd/system/k3s.service
[INFO] systemd: Enabling k3s unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.
[INFO] systemd: Starting k3sAprès récupération du node-token, installation des deux workers dans ce cluster k3s :
root@localhost:~# ssh ubuntu@10.26.23.75
Warning: Permanently added '10.26.23.75' (ED25519) to the list of known hosts.
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
ubuntu@k3s2:~$ curl -sfL https://get.k3s.io | K3S_URL='https://10.26.23.163:6443' K3S_TOKEN=K100df339c075cfa287710648ed7ba381667496813d04b7603150856c8c673cc07b::server:2300bb645db019e47caaa971f0f8460b sh -
[INFO] Finding release for channel stable
[INFO] Using v1.25.6+k3s1 as release
[INFO] Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.25.6+k3s1/sha256sum-amd64.txt
[INFO] Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.25.6+k3s1/k3s
[INFO] Verifying binary download
[INFO] Installing k3s to /usr/local/bin/k3s
[INFO] Skipping installation of SELinux RPM
[INFO] Creating /usr/local/bin/kubectl symlink to k3s
[INFO] Creating /usr/local/bin/crictl symlink to k3s
[INFO] Creating /usr/local/bin/ctr symlink to k3s
[INFO] Creating killall script /usr/local/bin/k3s-killall.sh
[INFO] Creating uninstall script /usr/local/bin/k3s-agent-uninstall.sh
[INFO] env: Creating environment file /etc/systemd/system/k3s-agent.service.env
[INFO] systemd: Creating service file /etc/systemd/system/k3s-agent.service
[INFO] systemd: Enabling k3s-agent unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s-agent.service → /etc/systemd/system/k3s-agent.service.
[INFO] systemd: Starting k3s-agent
ubuntu@k3s2:~$ exit
logout
Connection to 10.26.23.75 closed.
root@localhost:~# ssh ubuntu@10.26.23.87
Warning: Permanently added '10.26.23.87' (ED25519) to the list of known hosts.
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
ubuntu@k3s3:~$ curl -sfL https://get.k3s.io | K3S_URL='https://10.26.23.163:6443' K3S_TOKEN=K100df339c075cfa287710648ed7ba381667496813d04b7603150856c8c673cc07b::server:2300bb645db019e47caaa971f0f8460b sh -
[INFO] Finding release for channel stable
[INFO] Using v1.25.6+k3s1 as release
[INFO] Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.25.6+k3s1/sha256sum-amd64.txt
[INFO] Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.25.6+k3s1/k3s
[INFO] Verifying binary download
[INFO] Installing k3s to /usr/local/bin/k3s
[INFO] Skipping installation of SELinux RPM
[INFO] Creating /usr/local/bin/kubectl symlink to k3s
[INFO] Creating /usr/local/bin/crictl symlink to k3s
[INFO] Creating /usr/local/bin/ctr symlink to k3s
[INFO] Creating killall script /usr/local/bin/k3s-killall.sh
[INFO] Creating uninstall script /usr/local/bin/k3s-agent-uninstall.sh
[INFO] env: Creating environment file /etc/systemd/system/k3s-agent.service.env
[INFO] systemd: Creating service file /etc/systemd/system/k3s-agent.service
[INFO] systemd: Enabling k3s-agent unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s-agent.service → /etc/systemd/system/k3s-agent.service.
[INFO] systemd: Starting k3s-agentubuntu@k3s1:~$ mkdir .kube && sudo cp /etc/rancher/k3s/k3s.yaml .kube/config && sudo chown -R $USER .kube/*
ubuntu@k3s1:~$ curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.25.6/bin/linux/amd64/kubectl && chmod +x kubectl && sudo rm /usr/local/bin/kubectl && sudo mv kubectl /usr/bin
ubuntu@k3s1:~$ kubectl cluster-info
Kubernetes control plane is running at https://127.0.0.1:6443
CoreDNS is running at https://127.0.0.1:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
Metrics-server is running at https://127.0.0.1:6443/api/v1/namespaces/kube-system/services/https:metrics-server:https/proxy
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
ubuntu@k3s1:~$ kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
k3s2 NotReady <none> 3m31s v1.25.6+k3s1 10.26.23.75 <none> Ubuntu 22.04.1 LTS 5.15.0-60-generic containerd://1.6.15-k3s1
k3s3 NotReady <none> 3m8s v1.25.6+k3s1 10.26.23.87 <none> Ubuntu 22.04.1 LTS 5.15.0-60-generic containerd://1.6.15-k3s1
k3s1 NotReady control-plane,master 7m19s v1.25.6+k3s1 10.26.23.163 <none> Ubuntu 22.04.1 LTS 5.15.0-60-generic containerd://1.6.15-k3s1
ubuntu@k3s1:~$ kubectl get po,svc -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system pod/metrics-server-5f9f776df5-jzq2f 0/1 Pending 0 7m13s
kube-system pod/local-path-provisioner-79f67d76f8-tg2dj 0/1 Pending 0 7m13s
kube-system pod/coredns-597584b69b-4bg2h 0/1 Pending 0 7m13s
kube-system pod/helm-install-traefik-k9m7j 0/1 Pending 0 7m14s
kube-system pod/helm-install-traefik-crd-4vh8j 0/1 Pending 0 7m14s
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default service/kubernetes ClusterIP 10.43.0.1 <none> 443/TCP 7m28s
kube-system service/kube-dns ClusterIP 10.43.0.10 <none> 53/UDP,53/TCP,9153/TCP 7m25s
kube-system service/metrics-server ClusterIP 10.43.252.18 <none> 443/TCP 7m24sSuivi de l’installation de Helm 3 :
ubuntu@k3s1:~$ curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
Downloading https://get.helm.sh/helm-v3.11.1-linux-amd64.tar.gz
Verifying checksum... Done.
Preparing to install helm into /usr/local/bin
helm installed into /usr/local/bin/helm
ubuntu@k3s1:~$ chmod 400 .kube/config
ubuntu@k3s1:~$ helm ls
NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSIONsuivi de Cilium BGP (beta) …
ubuntu@k3s1:~$ helm repo add cilium https://helm.cilium.io/
"cilium" has been added to your repositories
ubuntu@k3s1:~$ helm repo update
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "cilium" chart repository
Update Complete. ⎈Happy Helming!⎈Le support BGP est activé en fournissant la configuration BGP via un ConfigMap et en définissant quelques valeurs avec Helm. Sinon, BGP est désactivé par défaut. Je me base pour cela sur la passerelle fournie dans LXD :
root@localhost:~# ifconfig lxdbr0
lxdbr0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.26.23.1 netmask 255.255.255.0 broadcast 0.0.0.0
ether 00:16:3e:a3:ba:e8 txqueuelen 1000 (Ethernet)
RX packets 8742 bytes 563385 (563.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 18343 bytes 264191495 (264.1 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
root@localhost:~# lxc ls
+------+---------+---------------------+------+-----------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+------+---------+---------------------+------+-----------+-----------+
| k3s1 | RUNNING | 10.26.23.163 (eth0) | | CONTAINER | 0 |
+------+---------+---------------------+------+-----------+-----------+
| k3s2 | RUNNING | 10.26.23.75 (eth0) | | CONTAINER | 0 |
+------+---------+---------------------+------+-----------+-----------+
| k3s3 | RUNNING | 10.26.23.87 (eth0) | | CONTAINER | 0 |
+------+---------+---------------------+------+-----------+-----------+et ce segment d’adresses IP libres :
d’où ce fichier YAML pour la configuration :
ubuntu@k3s1:~$ cat config.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: bgp-config
namespace: kube-system
data:
config.yaml: |
peers:
- peer-address: 10.26.23.1
peer-asn: 64512
my-asn: 64512
address-pools:
- name: default
protocol: bgp
addresses:
- 10.26.23.32/27
ubuntu@k3s1:~$ kubectl apply -f config.yaml
configmap/bgp-config createdInstallation du Pod Cilium avec Helm :
ubuntu@k3s1:~$ helm install cilium cilium/cilium --version 1.13.0 \
--namespace kube-system \
--set bgp.enabled=true \
--set bgp.announce.loadbalancerIP=true \
--set bgp.announce.podCIDR=true
NAME: cilium
LAST DEPLOYED: Wed Mar 1 20:05:18 2023
NAMESPACE: kube-system
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
You have successfully installed Cilium with Hubble.
Your release version is 1.13.0.
For any further help, visit https://docs.cilium.io/en/v1.13/gettinghelpMise à jour de cette installation avec l’insertion de Cilium Hubble (avec une interface utilisateur de Hubble pouvant accéder à la carte graphique des services):
ubuntu@k3s1:~$ helm upgrade cilium cilium/cilium --version 1.13.0 \
--namespace kube-system \
--set bgp.enabled=true \
--set bgp.announce.loadbalancerIP=true \
--set bgp.announce.podCIDR=true \
--set sctp.enabled=true \
--set hubble.enabled=true \
--set hubble.metrics.enabled="{dns,drop,tcp,flow,icmp,http}" \
--set hubble.relay.enabled=true \
--set hubble.ui.enabled=true \
--set hubble.ui.service.type=LoadBalancer \
--set hubble.relay.service.type=LoadBalancer
Release "cilium" has been upgraded. Happy Helming!
NAME: cilium
LAST DEPLOYED: Wed Mar 1 20:09:00 2023
NAMESPACE: kube-system
STATUS: deployed
REVISION: 2
TEST SUITE: None
NOTES:
You have successfully installed Cilium with Hubble Relay and Hubble UI.
Your release version is 1.13.0.
For any further help, visit https://docs.cilium.io/en/v1.13/gettinghelproot@localhost:~# lxc ls
+------+---------+--------------------------+------+-----------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
+------+---------+--------------------------+------+-----------+-----------+
| k3s1 | RUNNING | 10.26.23.163 (eth0) | | CONTAINER | 0 |
| | | 10.0.2.99 (cilium_host) | | | |
+------+---------+--------------------------+------+-----------+-----------+
| k3s2 | RUNNING | 10.26.23.75 (eth0) | | CONTAINER | 0 |
| | | 10.0.0.117 (cilium_host) | | | |
+------+---------+--------------------------+------+-----------+-----------+
| k3s3 | RUNNING | 10.0.1.16 (cilium_host) | | CONTAINER | 0 |
+------+---------+--------------------------+------+-----------+-----------+
Dès lors, test avec le déploiement encore une fois du sempiternel démonstrateur FC :
ubuntu@k3s1:~$ cat <<EOF | kubectl apply -f -
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: fcdemo3
labels:
app: fcdemo3
spec:
replicas: 4
selector:
matchLabels:
app: fcdemo3
template:
metadata:
labels:
app: fcdemo3
spec:
containers:
- name: fcdemo3
image: mcas/franceconnect-demo2:latest
ports:
- containerPort: 3000
---
apiVersion: v1
kind: Service
metadata:
name: fcdemo-service
spec:
type: LoadBalancer
selector:
app: fcdemo3
ports:
- protocol: TCP
port: 80
targetPort: 3000
EOF
deployment.apps/fcdemo3 created
service/fcdemo-service created
ubuntu@k3s1:~$ kubectl get po,svc
NAME READY STATUS RESTARTS AGE
pod/fcdemo3-6bff77544b-n8x5j 1/1 Running 0 56s
pod/fcdemo3-6bff77544b-n7shv 1/1 Running 0 56s
pod/fcdemo3-6bff77544b-z6s44 1/1 Running 0 56s
pod/fcdemo3-6bff77544b-wmcrg 1/1 Running 0 56s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.43.0.1 <none> 443/TCP 54m
service/fcdemo-service LoadBalancer 10.43.212.198 10.26.23.35 80:30918/TCP 56sEt il est en effet possible à ce stade d’accéder au démonstrateur avec l’adresse IP fournie avec Cilium BGP :
ubuntu@k3s1:~$ http http://10.26.23.35
HTTP/1.1 200 OK
Connection: keep-alive
Content-Length: 2740
Content-Type: text/html; charset=utf-8
Date: Wed, 01 Mar 2023 20:39:41 GMT
ETag: W/"ab4-v8wreE8WoQJ/5EqjkvRXgbacjz4"
X-Powered-By: Express
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</html>Pour plus de clarté, exposition via Ngrok :
ubuntu@k3s1:~$ curl -s https://ngrok-agent.s3.amazonaws.com/ngrok.asc | sudo tee /etc/apt/trusted.gpg.d/ngrok.asc >/dev/null && echo "deb https://ngrok-agent.s3.amazonaws.com buster main" | sudo tee /etc/apt/sources.list.d/ngrok.list && sudo apt update && sudo apt install ngrokubuntu@k3s1:~$ ngrok http 10.26.23.35:80
ngrok (Ctrl+C to quit)
Add Okta or Azure to protect your ngrok dashboard with SSO: https://ngrok.com/dashSSO
Session Status online
Account eddi now (Plan: Free)
Version 3.1.1
Region Europe (eu)
Latency -
Web Interface http://127.0.0.1:4040
Forwarding https://f1e1-172-105-130-186.eu.ngrok.io -> http://10.26.23.35:80
Connections ttl opn rt1 rt5 p50 p90
0 0 0.00 0.00 0.00 0.00 
Un petit regard côté observabilité dans Cilium avec Hubble et son interface graphique fournie également en mode LoadBalancer :
ubuntu@k3s1:~$ kubectl get svc -A
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes ClusterIP 10.43.0.1 <none> 443/TCP 72m
kube-system kube-dns ClusterIP 10.43.0.10 <none> 53/UDP,53/TCP,9153/TCP 72m
kube-system metrics-server ClusterIP 10.43.252.18 <none> 443/TCP 72m
kube-system hubble-peer ClusterIP 10.43.92.181 <none> 443/TCP 49m
kube-system traefik LoadBalancer 10.43.155.56 10.26.23.32 80:30264/TCP,443:31266/TCP 48m
kube-system hubble-relay LoadBalancer 10.43.128.151 10.26.23.33 80:31405/TCP 45m
kube-system hubble-metrics ClusterIP None <none> 9965/TCP 45m
kube-system hubble-ui LoadBalancer 10.43.66.116 10.26.23.34 80:30183/TCP 45m
default fcdemo-service LoadBalancer 10.43.212.198 10.26.23.35 80:30918/TCP 19m
root@localhost:~# ssh -L 0.0.0.0:80:10.43.66.116:80 ubuntu@10.26.23.163
Il faut noter qu’il est également offert la possibilité de configurer l’équilibrage de charge par proxy pour les services Kubernetes en utilisant Cilium.
Ce qui est utile pour des cas d’utilisation tels que l’équilibrage de charge gRPC.
Une fois activé, le trafic vers un service Kubernetes sera redirigé vers un proxy Envoy géré par Cilium pour l’équilibrage de charge. Cette fonctionnalité est indépendante de la fonctionnalité Kubernetes Ingress Support (Proxy Load Balancing for Kubernetes Services (beta)) :
Test avec ce déploiement comprenant notamment des charges de travail de test consistant en un client de déploiement et un service echo-service avec deux Pods en backend :
ubuntu@k3s1:~$ kubectl apply -f https://raw.githubusercontent.com/cilium/cilium/HEAD/examples/kubernetes/servicemesh/envoy/test-application-proxy-loadbalancing.yaml
configmap/coredns-configmap created
deployment.apps/client created
deployment.apps/echo-service created
service/echo-service created
ubuntu@k3s1:~$ watch -c kubectl get po,svc -A
ubuntu@k3s1:~$ CLIENT=$(kubectl get pods -l name=client -o jsonpath='{.items[0].metadata.name}')
ubuntu@k3s1:~$ kubectl exec -it $CLIENT -- curl -v echo-service:8080/
* Trying 10.43.199.92:8080...
* Connected to echo-service (10.43.199.92) port 8080 (#0)
> GET / HTTP/1.1
> Host: echo-service:8080
> User-Agent: curl/7.83.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< X-Powered-By: Express
< Vary: Origin, Accept-Encoding
< Access-Control-Allow-Credentials: true
< Accept-Ranges: bytes
< Cache-Control: public, max-age=0
< Last-Modified: Wed, 21 Sep 2022 10:25:56 GMT
< ETag: W/"809-1835f952f20"
< Content-Type: text/html; charset=UTF-8
< Content-Length: 2057
< Date: Wed, 01 Mar 2023 21:12:11 GMT
< Connection: keep-alive
< Keep-Alive: timeout=5
<
<html>
<head>
<link
rel="stylesheet"
href="https://use.fontawesome.com/releases/v5.8.2/css/all.css"
integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay"
crossorigin="anonymous"
/>
<link rel="stylesheet" href="style.css" />
<title>JSON Server</title>
</head>
<body>
<header>
<div class="container">
<nav>
<ul>
<li class="title">
JSON Server
</li>
<li>
<a href="https://github.com/users/typicode/sponsorship">
<i class="fas fa-heart"></i>GitHub Sponsors
</a>
</li>
<li>
<a href="https://my-json-server.typicode.com">
<i class="fas fa-burn"></i>My JSON Server
</a>
</li>
<li>
<a href="https://thanks.typicode.com">
<i class="far fa-laugh"></i>Supporters
</a>
</li>
</ul>
</nav>
</div>
</header>
<main>
<div class="container">
<h1>Congrats!</h1>
<p>
You're successfully running JSON Server
<br />
✧*｡٩(ˊᗜˋ*)و✧*｡
</p>
<div id="resources"></div>
<p>
To access and modify resources, you can use any HTTP method:
</p>
<p>
<code>GET</code>
<code>POST</code>
<code>PUT</code>
<code>PATCH</code>
<code>DELETE</code>
<code>OPTIONS</code>
</p>
<div id="custom-routes"></div>
<h1>Documentation</h1>
<p>
<a href="https://github.com/typicode/json-server">
README
</a>
</p>
</div>
</main>
<footer>
<div class="container">
<p>
To replace this page, create a
<code>./public/index.html</code> file.
</p>
</div>
</footer>
<script src="script.js"></script>
</body>
</html>
* Connection #0 to host echo-service left intactL’ajout d’une politique en couche 7 introduit le proxy Envoy dans le chemin de ce trafic. La requête passant maintenant par le proxy Envoy et se dirigeant ensuite vers le backend …
ubuntu@k3s1:~$ kubectl annotate service echo-service service.cilium.io/lb-l7=enabled
service/echo-service annotated
ubuntu@k3s1:~$ kubectl exec -it $CLIENT -- curl -v echo-service:8080/
* Trying 10.43.199.92:8080...
* Connected to echo-service (10.43.199.92) port 8080 (#0)
> GET / HTTP/1.1
> Host: echo-service:8080
> User-Agent: curl/7.83.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< X-Powered-By: Express
< Vary: Origin, Accept-Encoding
< Access-Control-Allow-Credentials: true
< Accept-Ranges: bytes
< Cache-Control: public, max-age=0
< Last-Modified: Wed, 21 Sep 2022 10:25:56 GMT
< ETag: W/"809-1835f952f20"
< Content-Type: text/html; charset=UTF-8
< Content-Length: 2057
< Date: Wed, 01 Mar 2023 21:12:33 GMT
< Connection: keep-alive
< Keep-Alive: timeout=5
<
<html>
<head>
<link
rel="stylesheet"
href="https://use.fontawesome.com/releases/v5.8.2/css/all.css"
integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay"
crossorigin="anonymous"
/>
<link rel="stylesheet" href="style.css" />
<title>JSON Server</title>
</head>
<body>
<header>
<div class="container">
<nav>
<ul>
<li class="title">
JSON Server
</li>
<li>
<a href="https://github.com/users/typicode/sponsorship">
<i class="fas fa-heart"></i>GitHub Sponsors
</a>
</li>
<li>
<a href="https://my-json-server.typicode.com">
<i class="fas fa-burn"></i>My JSON Server
</a>
</li>
<li>
<a href="https://thanks.typicode.com">
<i class="far fa-laugh"></i>Supporters
</a>
</li>
</ul>
</nav>
</div>
</header>
<main>
<div class="container">
<h1>Congrats!</h1>
<p>
You're successfully running JSON Server
<br />
✧*｡٩(ˊᗜˋ*)و✧*｡
</p>
<div id="resources"></div>
<p>
To access and modify resources, you can use any HTTP method:
</p>
<p>
<code>GET</code>
<code>POST</code>
<code>PUT</code>
<code>PATCH</code>
<code>DELETE</code>
<code>OPTIONS</code>
</p>
<div id="custom-routes"></div>
<h1>Documentation</h1>
<p>
<a href="https://github.com/typicode/json-server">
README
</a>
</p>
</div>
</main>
<footer>
<div class="container">
<p>
To replace this page, create a
<code>./public/index.html</code> file.
</p>
</div>
</footer>
<script src="script.js"></script>
</body>
</html>
* Connection #0 to host echo-service left intact
Cilium et kube-router coopèrent pour utiliser kube-router pour le peering BGP et la propagation des routes et Cilium pour l’application des politiques et l’équilibrage des charges.
ou de l’utilisation conjointe de BIRD :
Le routage à travers les clusters Kubernetes est offert avec Cluster Mesh :
Récapitulatif des nouveautés induites dans la dernière version de Cilium et quelques liens supplémentaires …
