GitBook version
Full asciinema demo can be found here: https://asciinema.org/a/226632
Slides: https://slides.com/ruzickap/k8s-istio-demo
Requirements
kubectl (kubernetes-client package)
or just
Install Kubernetes
The following sections will show you how to install k8s to OpenStack or how to use Minikube .
Use Minikube to start the Kubernetes cluster
Install Minikube if needed: https://kubernetes.io/docs/tasks/tools/install-minikube/
Start Minikube
Copy KUBERNETES_VERSION = $( curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt | tr -d v )
sudo minikube start --vm-driver=none --bootstrapper=kubeadm --kubernetes-version=v${KUBERNETES_VERSION} Install kubernetes-client package (kubectl):
Copy curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | tee -a /etc/apt/sources.list.d/kubernetes.list
apt-get update -qq
apt-get install -y kubectl socat Install Kubernetes to OpenStack
Install k8s to OpenStack using Terraform .
You will need to have Docker installed.
Prepare the working environment inside Docker
You can skip this part if you have kubectl , Helm , Siege and Terraform installed.
Run Ubuntu docker image and mount the directory there:
Copy mkdir /tmp/test && cd /tmp/test
docker run -it -rm -e DISPLAY= $DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix -v $PWD :/mnt ubuntu Install necessary software into the Docker container:
Copy apt update -qq
apt-get install -y -qq apt-transport-https curl firefox git gnupg jq openssh-client psmisc siege sudo unzip vim > /dev/null Install kubernetes-client package - (kubectl):
Copy curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" > /etc/apt/sources.list.d/kubernetes.list
apt-get update -qq
apt-get install -y -qq kubectl Install Terraform :
Copy TERRAFORM_LATEST_VERSION=$(curl -s https://checkpoint-api.hashicorp.com/v1/check/terraform | jq -r -M ".current_version")
curl --silent --location "https://releases.hashicorp.com/terraform/${TERRAFORM_LATEST_VERSION}/terraform_${TERRAFORM_LATEST_VERSION}_linux_amd64.zip" --output /tmp/terraform_linux_amd64.zip
unzip -o /tmp/terraform_linux_amd64.zip -d /usr/local/bin/ Change directory to /mnt where the git repository is mounted:
Provision VMs in OpenStack
Start 3 VMs (one master and 2 workers) where the k8s will be installed.
Generate ssh keys if not exists:
Copy test -f "${HOME}/.ssh/id_rsa" || (install -m 0700 -d "${HOME}/.ssh" && ssh-keygen -b 2048 -t rsa -f "${HOME}/.ssh/id_rsa" -q -N "")
# ssh-agent must be running...
test -n "$SSH_AUTH_SOCK" || eval ` ssh-agent `
if [ "` ssh-add -l `" = "The agent has no identities." ]; then ssh-add ; fi Clone this git repository:
Copy git clone https://github.com/ruzickap/k8s-istio-demo
cd k8s-istio-demo Modify the Terraform variable file if needed:
Copy OPENSTACK_PASSWORD = ${OPENSTACK_PASSWORD :- default}
cat > terraform/openstack/terraform.tfvars << EOF
openstack_auth_url = "https://ic-us.ssl.mirantis.net:5000/v3"
openstack_instance_flavor_name = "compact.dbs"
openstack_instance_image_name = "bionic-server-cloudimg-amd64-20190119"
openstack_networking_subnet_dns_nameservers = ["172.19.80.70"]
openstack_password = "$OPENSTACK_PASSWORD"
openstack_tenant_name = "mirantis-services-team"
openstack_user_name = "pruzicka"
openstack_user_domain_name = "ldap_mirantis"
prefix = "pruzicka-k8s-istio-demo"
EOF Download Terraform components:
Copy terraform init -var-file=terraform/openstack/terraform.tfvars terraform/openstack Create VMs in OpenStack:
Copy terraform apply -auto-approve -var-file=terraform/openstack/terraform.tfvars terraform/openstack Show Terraform output:
Output:
Copy vms_name = [
pruzicka-k8s-istio-demo-node01.01.localdomain,
pruzicka-k8s-istio-demo-node02.01.localdomain,
pruzicka-k8s-istio-demo-node03.01.localdomain
]
vms_public_ip = [
172.16.240.185,
172.16.242.218,
172.16.240.44
] At the end of the output you should see 3 IP addresses which should be accessible by ssh using your public key ~/.ssh/id_rsa.pub.
Install k8s to the VMs
Install k8s using kubeadm to the provisioned VMs:
Copy ./install-k8s-kubeadm.sh Check if all nodes are up:
Copy export KUBECONFIG = $PWD /kubeconfig.conf
kubectl get nodes -o wide Output:
Copy NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
pruzicka-k8s-istio-demo-node01 Ready master 2m v1.13.3 192.168.250.11 <none> Ubuntu 18.04.1 LTS 4.15.0-43-generic docker://18.6.1
pruzicka-k8s-istio-demo-node02 Ready <none> 45s v1.13.3 192.168.250.12 <none> Ubuntu 18.04.1 LTS 4.15.0-43-generic docker://18.6.1
pruzicka-k8s-istio-demo-node03 Ready <none> 50s v1.13.3 192.168.250.13 <none> Ubuntu 18.04.1 LTS 4.15.0-43-generic docker://18.6.1 View services, deployments, and pods:
Copy kubectl get svc,deploy,po --all-namespaces -o wide Output:
Copy NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT ( S ) AGE SELECTOR
default service/kubernetes ClusterIP 10.96 .0.1 < non e > 443 /TCP 2 m16s < non e >
kube-system service/kube-dns ClusterIP 10.96 .0.10 < non e > 53 /UDP,53/TCP 2 m11s k8s-app=kube-dns
NAMESPACE NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
kube-system deployment.extensions/coredns 2/2 2 2 2m11s coredns k8s.gcr.io/coredns:1.2.6 k8s-app=kube-dns
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system pod/coredns-86c58d9df4-tlmvh 1/1 Running 0 116s 10.244.0.2 pruzicka-k8s-istio-demo-node01 <none> <none>
kube-system pod/coredns-86c58d9df4-zk685 1/1 Running 0 116s 10.244.0.3 pruzicka-k8s-istio-demo-node01 <none> <none>
kube-system pod/etcd-pruzicka-k8s-istio-demo-node01 1/1 Running 0 79s 192.168.250.11 pruzicka-k8s-istio-demo-node01 <none> <none>
kube-system pod/kube-apiserver-pruzicka-k8s-istio-demo-node01 1/1 Running 0 72s 192.168.250.11 pruzicka-k8s-istio-demo-node01 <none> <none>
kube-system pod/kube-controller-manager-pruzicka-k8s-istio-demo-node01 1/1 Running 0 65s 192.168.250.11 pruzicka-k8s-istio-demo-node01 <none> <none>
kube-system pod/kube-flannel-ds-amd64-cvpfq 1/1 Running 0 65s 192.168.250.13 pruzicka-k8s-istio-demo-node03 <none> <none>
kube-system pod/kube-flannel-ds-amd64-ggqmv 1/1 Running 0 60s 192.168.250.12 pruzicka-k8s-istio-demo-node02 <none> <none>
kube-system pod/kube-flannel-ds-amd64-ql6g6 1/1 Running 0 117s 192.168.250.11 pruzicka-k8s-istio-demo-node01 <none> <none>
kube-system pod/kube-proxy-79mx8 1/1 Running 0 117s 192.168.250.11 pruzicka-k8s-istio-demo-node01 <none> <none>
kube-system pod/kube-proxy-f99q2 1/1 Running 0 65s 192.168.250.13 pruzicka-k8s-istio-demo-node03 <none> <none>
kube-system pod/kube-proxy-w4tbd 1/1 Running 0 60s 192.168.250.12 pruzicka-k8s-istio-demo-node02 <none> <none>
kube-system pod/kube-scheduler-pruzicka-k8s-istio-demo-node01 1/1 Running 0 78s 192.168.250.11 pruzicka-k8s-istio-demo-node01 <none> <none> Install Helm
Install Helm binary locally:
Copy export DESIRED_VERSION = "v2.13.0"
curl -s https://raw.githubusercontent.com/helm/helm/master/scripts/get | bash Install Tiller (the Helm server-side component) into the Kubernetes cluster:
Copy kubectl create serviceaccount tiller --namespace kube-system
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
helm init --wait --service-account tiller
helm repo update Check if the tiller was installed properly:
Copy kubectl get pods -l app=helm --all-namespaces Output:
Copy NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system tiller-deploy-dbb85cb99-z4c47 1 /1 Running 0 28 s Install Rook
Install Rook Operator (Ceph storage for k8s):
Copy helm repo add rook-stable https://charts.rook.io/stable
helm install --wait --name rook-ceph --namespace rook-ceph-system rook-stable/rook-ceph
sleep 110 See how the rook-ceph-system should look like:
Copy kubectl get svc,deploy,po --namespace=rook-ceph-system -o wide Output:
Copy NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.extensions/rook-ceph-operator 1/1 1 1 3m36s rook-ceph-operator rook/ceph:v0.9.2 app=rook-ceph-operator
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/rook-ceph-agent-2bxhq 1/1 Running 0 2m14s 192.168.250.12 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/rook-ceph-agent-8h4p4 1/1 Running 0 2m14s 192.168.250.11 pruzicka-k8s-istio-demo-node01 <none> <none>
pod/rook-ceph-agent-mq69r 1/1 Running 0 2m14s 192.168.250.13 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/rook-ceph-operator-7478c899b5-px2hc 1/1 Running 0 3m37s 10.244.2.3 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/rook-discover-8ffj8 1/1 Running 0 2m14s 10.244.2.4 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/rook-discover-l56jj 1/1 Running 0 2m14s 10.244.1.2 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/rook-discover-q9xwp 1/1 Running 0 2m14s 10.244.0.4 pruzicka-k8s-istio-demo-node01 <none> <none> Create your Rook cluster:
Copy kubectl create -f https://raw.githubusercontent.com/rook/rook/v0.9.3/cluster/examples/kubernetes/ceph/cluster.yaml
sleep 100 Get the Toolbox with Ceph commands:
Copy kubectl create -f https://raw.githubusercontent.com/rook/rook/v0.9.3/cluster/examples/kubernetes/ceph/toolbox.yaml
sleep 300 Check what was created in rook-ceph namespace:
Copy kubectl get svc,deploy,po --namespace=rook-ceph -o wide Output:
Copy NAME TYPE CLUSTER-IP EXTERNAL-IP PORT ( S ) AGE SELECTOR
service/rook-ceph-mgr ClusterIP 10.103.36.128 <none> 9283/TCP 8m45s app=rook-ceph-mgr,rook_cluster=rook-ceph
service/rook-ceph-mgr-dashboard ClusterIP 10.99.173.58 <none> 8443/TCP 8m45s app=rook-ceph-mgr,rook_cluster=rook-ceph
service/rook-ceph-mon-a ClusterIP 10.102.39.160 <none> 6790/TCP 12m app=rook-ceph-mon,ceph_daemon_id=a,mon=a,mon_cluster=rook-ceph,rook_cluster=rook-ceph
service/rook-ceph-mon-b ClusterIP 10.102.49.137 <none> 6790/TCP 11m app=rook-ceph-mon,ceph_daemon_id=b,mon=b,mon_cluster=rook-ceph,rook_cluster=rook-ceph
service/rook-ceph-mon-c ClusterIP 10.96.25.143 <none> 6790/TCP 10m app=rook-ceph-mon,ceph_daemon_id=c,mon=c,mon_cluster=rook-ceph,rook_cluster=rook-ceph
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.extensions/rook-ceph-mgr-a 1/1 1 1 9m33s mgr ceph/ceph:v13 app=rook-ceph-mgr,ceph_daemon_id=a,instance=a,mgr=a,rook_cluster=rook-ceph
deployment.extensions/rook-ceph-mon-a 1/1 1 1 12m mon ceph/ceph:v13 app=rook-ceph-mon,ceph_daemon_id=a,mon=a,mon_cluster=rook-ceph,rook_cluster=rook-ceph
deployment.extensions/rook-ceph-mon-b 1/1 1 1 11m mon ceph/ceph:v13 app=rook-ceph-mon,ceph_daemon_id=b,mon=b,mon_cluster=rook-ceph,rook_cluster=rook-ceph
deployment.extensions/rook-ceph-mon-c 1/1 1 1 10m mon ceph/ceph:v13 app=rook-ceph-mon,ceph_daemon_id=c,mon=c,mon_cluster=rook-ceph,rook_cluster=rook-ceph
deployment.extensions/rook-ceph-osd-0 1/1 1 1 8m34s osd ceph/ceph:v13 app=rook-ceph-osd,ceph-osd-id=0,rook_cluster=rook-ceph
deployment.extensions/rook-ceph-osd-1 1/1 1 1 8m33s osd ceph/ceph:v13 app=rook-ceph-osd,ceph-osd-id=1,rook_cluster=rook-ceph
deployment.extensions/rook-ceph-osd-2 1/1 1 1 8m33s osd ceph/ceph:v13 app=rook-ceph-osd,ceph-osd-id=2,rook_cluster=rook-ceph
deployment.extensions/rook-ceph-tools 1/1 1 1 12m rook-ceph-tools rook/ceph:master app=rook-ceph-tools
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/rook-ceph-mgr-a-669f5b47fc-sjvrr 1/1 Running 0 9m33s 10.244.1.6 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/rook-ceph-mon-a-784f8fb5b6-zcvjr 1/1 Running 0 12m 10.244.0.5 pruzicka-k8s-istio-demo-node01 <none> <none>
pod/rook-ceph-mon-b-6dfbf486f4-2ktpm 1/1 Running 0 11m 10.244.2.5 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/rook-ceph-mon-c-6c85f6f44-j5wwv 1/1 Running 0 10m 10.244.1.5 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/rook-ceph-osd-0-6dd9cdc946-7th52 1/1 Running 0 8m34s 10.244.1.8 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/rook-ceph-osd-1-64cdd77897-9vdrh 1/1 Running 0 8m33s 10.244.2.7 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/rook-ceph-osd-2-67fcc446bd-skq52 1/1 Running 0 8m33s 10.244.0.7 pruzicka-k8s-istio-demo-node01 <none> <none>
pod/rook-ceph-osd-prepare-pruzicka-k8s-istio-demo-node01-z29hj 0/2 Completed 0 8m39s 10.244.0.6 pruzicka-k8s-istio-demo-node01 <none> <none>
pod/rook-ceph-osd-prepare-pruzicka-k8s-istio-demo-node02-q8xqx 0/2 Completed 0 8m39s 10.244.2.6 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/rook-ceph-osd-prepare-pruzicka-k8s-istio-demo-node03-vbwxv 0/2 Completed 0 8m39s 10.244.1.7 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/rook-ceph-tools-76c7d559b6-s6s4l 1/1 Running 0 12m 192.168.250.12 pruzicka-k8s-istio-demo-node02 <none> <none> Create a storage class based on the Ceph RBD volume plugin:
Copy kubectl create -f https://raw.githubusercontent.com/rook/rook/v0.9.3/cluster/examples/kubernetes/ceph/storageclass.yaml
sleep 10 Set rook-ceph-block as default Storage Class:
Copy kubectl patch storageclass rook-ceph-block -p "{\"metadata\": {\"annotations\":{\"storageclass.kubernetes.io/is-default-class\":\"true\"}}}" Check the Storage Classes:
Copy kubectl describe storageclass Output:
Copy Name: rook-ceph-block
IsDefaultClass: Yes
Annotations: storageclass.kubernetes.io/is-default-class= true
Provisioner: ceph.rook.io/block
Parameters: blockPool=replicapool,clusterNamespace=rook-ceph,fstype=xfs
AllowVolumeExpansion: < unse t >
MountOptions: < non e >
ReclaimPolicy: Delete
VolumeBindingMode: Immediate
Events: < non e > See the CephBlockPool:
Copy kubectl describe cephblockpool --namespace=rook-ceph Output:
Copy Name: replicapool
Namespace: rook-ceph
Labels: < non e >
Annotations: < non e >
API Version: ceph.rook.io/v1
Kind: CephBlockPool
Metadata:
Creation Timestamp: 2019 -02-04T09:51:55Z
Generation: 1
Resource Version: 3171
Self Link: /apis/ceph.rook.io/v1/namespaces/rook-ceph/cephblockpools/replicapool
UID: 8163367 d-2862-11e9-a470-fa163e90237a
Spec:
Replicated:
Size: 1
Events: < non e > Check the status of your Ceph installation:
Copy kubectl -n rook-ceph exec $(kubectl -n rook-ceph get pod -l "app=rook-ceph-tools" -o jsonpath="{.items[0].metadata.name}") -- ceph status Output:
Copy cluster:
id: 1 f4458a6-f574-4e6c-8a25-5a5eef6eb0a7
health: HEALTH_OK
services:
mon: 3 daemons, quorum c,a,b
mgr: a ( active )
osd: 3 osds: 3 up, 3 in
data:
pools: 1 pools, 100 pgs
objects: 0 objects, 0 B
usage: 13 GiB used, 44 GiB / 58 GiB avail
pgs: 100 active+clean Ceph status:
Copy kubectl -n rook-ceph exec $(kubectl -n rook-ceph get pod -l "app=rook-ceph-tools" -o jsonpath="{.items[0].metadata.name}") -- ceph osd status Output:
Copy +----+--------------------------------+-------+-------+--------+---------+--------+---------+-----------+
| id | host | used | avail | wr ops | wr data | rd ops | rd data | state |
+----+--------------------------------+-------+-------+--------+---------+--------+---------+-----------+
| 0 | pruzicka-k8s-istio-demo-node03 | 4302M | 15.0G | 0 | 0 | 0 | 0 | exists,up |
| 1 | pruzicka-k8s-istio-demo-node02 | 4455M | 14.8G | 0 | 0 | 0 | 0 | exists,up |
| 2 | pruzicka-k8s-istio-demo-node01 | 4948M | 14.3G | 0 | 0 | 0 | 0 | exists,up |
+----+--------------------------------+-------+-------+--------+---------+--------+---------+-----------+ Check the cluster usage status:
Copy kubectl -n rook-ceph exec $(kubectl -n rook-ceph get pod -l "app=rook-ceph-tools" -o jsonpath="{.items[0].metadata.name}") -- ceph df Output:
Copy GLOBAL:
SIZE AVAIL RAW USED %RAW USED
58 GiB 44 GiB 13 GiB 23.22
POOLS:
NAME ID USED %USED MAX AVAIL OBJECTS
replicapool 1 0 B 0 40 GiB 0 Install ElasticSearch, Kibana, FluentBit
Add ElasticSearch operator to Helm:
Copy helm repo add es-operator https://raw.githubusercontent.com/upmc-enterprises/elasticsearch-operator/master/charts/ Install ElasticSearch operator:
Copy helm install --wait --name elasticsearch-operator es-operator/elasticsearch-operator --set rbac.enabled=True --namespace es-operator
sleep 50 Check how the operator looks like:
Copy kubectl get svc,deploy,po --namespace=es-operator -o wide Output:
Copy NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.extensions/elasticsearch-operator 1/1 1 1 106s elasticsearch-operator upmcenterprises/elasticsearch-operator:0.0.12 name=elasticsearch-operator,release=elasticsearch-operator
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/elasticsearch-operator-5dc59b8cc5-6946l 1/1 Running 0 106s 10.244.1.9 pruzicka-k8s-istio-demo-node03 <none> <none> Install ElasticSearch cluster:
Copy helm install --wait --name=elasticsearch --namespace logging es-operator/elasticsearch \
--set kibana.enabled= true \
--set cerebro.enabled= true \
--set storage.class=rook-ceph-block \
--set clientReplicas= 1 ,masterReplicas= 1 ,dataReplicas= 1
sleep 350 Show ElasticSearch components:
Copy kubectl get svc,deploy,po,pvc,elasticsearchclusters --namespace=logging -o wide Output:
Copy NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/cerebro-elasticsearch-cluster ClusterIP 10.105.197.151 <none> 80/TCP 18m role=cerebro
service/elasticsearch-discovery-elasticsearch-cluster ClusterIP 10.111.76.241 <none> 9300/TCP 18m component=elasticsearch-elasticsearch-cluster,role=master
service/elasticsearch-elasticsearch-cluster ClusterIP 10.104.103.49 <none> 9200/TCP 18m component=elasticsearch-elasticsearch-cluster,role=client
service/es-data-svc-elasticsearch-cluster ClusterIP 10.98.179.244 <none> 9300/TCP 18m component=elasticsearch-elasticsearch-cluster,role=data
service/kibana-elasticsearch-cluster ClusterIP 10.110.19.242 <none> 80/TCP 18m role=kibana
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.extensions/cerebro-elasticsearch-cluster 1/1 1 1 18m cerebro-elasticsearch-cluster upmcenterprises/cerebro:0.6.8 component=elasticsearch-elasticsearch-cluster,name=cerebro-elasticsearch-cluster,role=cerebro
deployment.extensions/es-client-elasticsearch-cluster 1/1 1 1 18m es-client-elasticsearch-cluster upmcenterprises/docker-elasticsearch-kubernetes:6.1.3_0 cluster=elasticsearch-cluster,component=elasticsearch-elasticsearch-cluster,name=es-client-elasticsearch-cluster,role=client
deployment.extensions/kibana-elasticsearch-cluster 1/1 1 1 18m kibana-elasticsearch-cluster docker.elastic.co/kibana/kibana-oss:6.1.3 component=elasticsearch-elasticsearch-cluster,name=kibana-elasticsearch-cluster,role=kibana
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/cerebro-elasticsearch-cluster-64888cf977-dgb8g 1/1 Running 0 18m 10.244.0.9 pruzicka-k8s-istio-demo-node01 <none> <none>
pod/es-client-elasticsearch-cluster-8d9df64b7-tvl8z 1/1 Running 0 18m 10.244.1.11 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/es-data-elasticsearch-cluster-rook-ceph-block-0 1/1 Running 0 18m 10.244.2.11 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/es-master-elasticsearch-cluster-rook-ceph-block-0 1/1 Running 0 18m 10.244.2.10 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/kibana-elasticsearch-cluster-7fb7f88f55-6sl6j 1/1 Running 0 18m 10.244.2.9 pruzicka-k8s-istio-demo-node02 <none> <none>
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
persistentvolumeclaim/es-data-es-data-elasticsearch-cluster-rook-ceph-block-0 Bound pvc-870ad81a-2863-11e9-a470-fa163e90237a 1Gi RWO rook-ceph-block 18m
persistentvolumeclaim/es-data-es-master-elasticsearch-cluster-rook-ceph-block-0 Bound pvc-86fcb9ce-2863-11e9-a470-fa163e90237a 1Gi RWO rook-ceph-block 18m
NAME AGE
elasticsearchcluster.enterprises.upmc.com/elasticsearch-cluster 18 m Install FluentBit :
Copy # https://github.com/fluent/fluent-bit/issues/628
helm install --wait stable/fluent-bit --name=fluent-bit --namespace=logging \
--set metrics.enabled=true \
--set backend.type=es \
--set backend.es.time_key='@ts' \
--set backend.es.host=elasticsearch-elasticsearch-cluster \
--set backend.es.tls=on \
--set backend.es.tls_verify=off Configure port forwarding for Kibana:
Copy # Kibana UI - https://localhost:5601
kubectl -n logging port-forward $(kubectl -n logging get pod -l role=kibana -o jsonpath="{.items[0].metadata.name}") 5601:5601 & Configure ElasticSearch:
Navigate to the Kibana UI and click the "Set up index patterns" in the top right.
Use * as the index pattern, and click "Next step.".
Select @timestamp as the Time Filter field name, and click "Create index pattern."
Check FluentBit installation:
Copy kubectl get -l app=fluent-bit svc,pods --all-namespaces -o wide Output:
Copy NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
logging service/fluent-bit-fluent-bit-metrics ClusterIP 10.97.33.162 <none> 2020/TCP 80s app=fluent-bit,release=fluent-bit
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
logging pod/fluent-bit-fluent-bit-426ph 1/1 Running 0 80s 10.244.0.10 pruzicka-k8s-istio-demo-node01 <none> <none>
logging pod/fluent-bit-fluent-bit-c6tbx 1/1 Running 0 80s 10.244.1.12 pruzicka-k8s-istio-demo-node03 <none> <none>
logging pod/fluent-bit-fluent-bit-zfkqr 1/1 Running 0 80s 10.244.2.12 pruzicka-k8s-istio-demo-node02 <none> <none> Istio architecture and features
Istio is an open platform-independent service mesh that provides traffic management, policy enforcement, and telemetry collection (layer 7 firewall + loadbalancer, ingress, blocking outgoing traffic, tracing, monitoring, logging).
Policies and Telemetry : Prometheus , StatsD , FluentD and many others ...
Istio architecture
Envoy - is a high-performance proxy to mediate all inbound and outbound traffic for all services in the service mesh.
Pilot - provides service discovery for the Envoy sidecars, traffic management capabilities for intelligent routing.
Mixer - enforces access control and usage policies across the service mesh, and collects telemetry data from the Envoy proxy and other services.
Citadel - provides strong service-to-service and end-user authentication with built-in identity and credential management.
Blue-green deployment and content based traffic steering
Istio Security Architecture
Istio types
VirtualService defines the rules that control how requests for a service are routed within an Istio service mesh.
DestinationRule configures the set of policies to be applied to a request after VirtualService routing has occurred.
ServiceEntry is commonly used to enable requests to services outside of an Istio service mesh.
Gateway configures a load balancer for HTTP/TCP traffic, most commonly operating at the edge of the mesh to enable ingress traffic for an application.
Install Istio
Copy [ -f $PWD/kubeconfig.conf ] && export KUBECONFIG=${KUBECONFIG:-$PWD/kubeconfig.conf}
kubectl get nodes -o wide Either download Istio directly from https://github.com/istio/istio/releases or get the latest version by using curl:
Copy export ISTIO_VERSION="1.0.6"
test -d files || mkdir files
cd files
curl -sL https://git.io/getLatestIstio | sh - Change the directory to the Istio installation files location:
Install istioctl:
Copy sudo mv bin/istioctl /usr/local/bin/ Install Istio using Helm:
Copy helm install --wait --name istio --namespace istio-system install/kubernetes/helm/istio \
--set gateways.istio-ingressgateway.type=NodePort \
--set gateways.istio-egressgateway.type=NodePort \
--set grafana.enabled=true \
--set kiali.enabled=true \
--set kiali.dashboard.grafanaURL=http://localhost:3000 \
--set kiali.dashboard.jaegerURL=http://localhost:16686 \
--set servicegraph.enabled=true \
--set telemetry-gateway.grafanaEnabled=true \
--set telemetry-gateway.prometheusEnabled=true \
--set tracing.enabled=true
sleep 30 See the Istio components:
Copy kubectl get --namespace=istio-system svc,deployment,pods -o wide Output:
Copy NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/grafana ClusterIP 10.101.117.126 <none> 3000/TCP 15m app=grafana
service/istio-citadel ClusterIP 10.99.235.151 <none> 8060/TCP,9093/TCP 15m istio=citadel
service/istio-egressgateway NodePort 10.105.213.174 <none> 80:31610/TCP,443:31811/TCP 15m app=istio-egressgateway,istio=egressgateway
service/istio-galley ClusterIP 10.110.154.0 <none> 443/TCP,9093/TCP 15m istio=galley
service/istio-ingressgateway NodePort 10.101.212.170 <none> 80:31380/TCP,443:31390/TCP,31400:31400/TCP,15011:31814/TCP,8060:31435/TCP,853:31471/TCP,15030:30210/TCP,15031:30498/TCP 15m app=istio-ingressgateway,istio=ingressgateway
service/istio-pilot ClusterIP 10.96.34.157 <none> 15010/TCP,15011/TCP,8080/TCP,9093/TCP 15m istio=pilot
service/istio-policy ClusterIP 10.98.185.215 <none> 9091/TCP,15004/TCP,9093/TCP 15m istio-mixer-type=policy,istio=mixer
service/istio-sidecar-injector ClusterIP 10.97.47.179 <none> 443/TCP 15m istio=sidecar-injector
service/istio-telemetry ClusterIP 10.103.23.55 <none> 9091/TCP,15004/TCP,9093/TCP,42422/TCP 15m istio-mixer-type=telemetry,istio=mixer
service/jaeger-agent ClusterIP None <none> 5775/UDP,6831/UDP,6832/UDP 15m app=jaeger
service/jaeger-collector ClusterIP 10.110.10.174 <none> 14267/TCP,14268/TCP 15m app=jaeger
service/jaeger-query ClusterIP 10.98.172.235 <none> 16686/TCP 15m app=jaeger
service/kiali ClusterIP 10.111.114.225 <none> 20001/TCP 15m app=kiali
service/prometheus ClusterIP 10.111.132.151 <none> 9090/TCP 15m app=prometheus
service/servicegraph ClusterIP 10.109.59.250 <none> 8088/TCP 15m app=servicegraph
service/tracing ClusterIP 10.96.59.251 <none> 80/TCP 15m app=jaeger
service/zipkin ClusterIP 10.107.168.128 <none> 9411/TCP 15m app=jaeger
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.extensions/grafana 1/1 1 1 15m grafana grafana/grafana:5.2.3 app=grafana
deployment.extensions/istio-citadel 1/1 1 1 15m citadel docker.io/istio/citadel:1.0.5 istio=citadel
deployment.extensions/istio-egressgateway 1/1 1 1 15m istio-proxy docker.io/istio/proxyv2:1.0.5 app=istio-egressgateway,istio=egressgateway
deployment.extensions/istio-galley 1/1 1 1 15m validator docker.io/istio/galley:1.0.5 istio=galley
deployment.extensions/istio-ingressgateway 1/1 1 1 15m istio-proxy docker.io/istio/proxyv2:1.0.5 app=istio-ingressgateway,istio=ingressgateway
deployment.extensions/istio-pilot 1/1 1 1 15m discovery,istio-proxy docker.io/istio/pilot:1.0.5,docker.io/istio/proxyv2:1.0.5 app=pilot,istio=pilot
deployment.extensions/istio-policy 1/1 1 1 15m mixer,istio-proxy docker.io/istio/mixer:1.0.5,docker.io/istio/proxyv2:1.0.5 app=policy,istio=mixer,istio-mixer-type=policy
deployment.extensions/istio-sidecar-injector 1/1 1 1 15m sidecar-injector-webhook docker.io/istio/sidecar_injector:1.0.5 istio=sidecar-injector
deployment.extensions/istio-telemetry 1/1 1 1 15m mixer,istio-proxy docker.io/istio/mixer:1.0.5,docker.io/istio/proxyv2:1.0.5 app=telemetry,istio=mixer,istio-mixer-type=telemetry
deployment.extensions/istio-tracing 1/1 1 1 15m jaeger docker.io/jaegertracing/all-in-one:1.5 app=jaeger
deployment.extensions/kiali 1/1 1 1 15m kiali docker.io/kiali/kiali:v0.10 app=kiali
deployment.extensions/prometheus 1/1 1 1 15m prometheus docker.io/prom/prometheus:v2.3.1 app=prometheus
deployment.extensions/servicegraph 1/1 1 1 15m servicegraph docker.io/istio/servicegraph:1.0.5 app=servicegraph
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/grafana-59b8896965-pmwd2 1/1 Running 0 15m 10.244.1.16 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/istio-citadel-856f994c58-8r8nr 1/1 Running 0 15m 10.244.1.17 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/istio-egressgateway-5649fcf57-sv8wf 1/1 Running 0 15m 10.244.1.14 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/istio-galley-7665f65c9c-8sjmm 1/1 Running 0 15m 10.244.1.18 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/istio-grafana-post-install-kw74d 0/1 Completed 0 10m 10.244.1.19 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/istio-ingressgateway-6755b9bbf6-f7pnx 1/1 Running 0 15m 10.244.1.13 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/istio-pilot-56855d999b-6zq86 2/2 Running 0 15m 10.244.0.11 pruzicka-k8s-istio-demo-node01 <none> <none>
pod/istio-policy-6fcb6d655f-4zndw 2/2 Running 0 15m 10.244.2.13 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/istio-sidecar-injector-768c79f7bf-74wbc 1/1 Running 0 15m 10.244.2.18 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/istio-telemetry-664d896cf5-smz7w 2/2 Running 0 15m 10.244.2.14 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/istio-tracing-6b994895fd-vb58q 1/1 Running 0 15m 10.244.2.17 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/kiali-67c69889b5-sw92h 1/1 Running 0 15m 10.244.1.15 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/prometheus-76b7745b64-kwzj5 1/1 Running 0 15m 10.244.2.15 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/servicegraph-5c4485945b-j9bp2 1/1 Running 0 15m 10.244.2.16 pruzicka-k8s-istio-demo-node02 <none> <none> Configure Istio with a new log type and send those logs to the FluentD:
Copy kubectl apply -f ../../yaml/fluentd-istio.yaml Istio example
Check how Istio can be used and how it works...
Check + Enable Istio in default namespace
Let the default namespace to use Istio injection:
Copy kubectl label namespace default istio-injection=enabled Check namespaces:
Copy kubectl get namespace -L istio-injection Output:
Copy NAME STATUS AGE ISTIO-INJECTION
default Active 70m enabled
es-operator Active 41m
istio-system Active 16m
kube-public Active 70m
kube-system Active 70m
logging Active 38m
rook-ceph Active 59m
rook-ceph-system Active 63m Configure port forwarding for Istio services:
Copy # Jaeger - http://localhost:16686
kubectl port-forward -n istio-system $(kubectl get pod -n istio-system -l app=jaeger -o jsonpath="{.items[0].metadata.name}") 16686:16686 &
# Prometheus - http://localhost:9090/graph
kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=prometheus -o jsonpath="{.items[0].metadata.name}") 9090:9090 &
# Grafana - http://localhost:3000/dashboard/db/istio-mesh-dashboard
kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=grafana -o jsonpath="{.items[0].metadata.name}") 3000:3000 &
# Kiali - http://localhost:20001
kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=kiali -o jsonpath="{.items[0].metadata.name}") 20001:20001 &
# Servicegraph - http://localhost:8088/force/forcegraph.html
kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=servicegraph -o jsonpath="{.items[0].metadata.name}") 8088:8088 & Deploy application into the default namespace where Istio is enabled
The Bookinfo application is broken into four separate microservices:
productpage - the productpage microservice calls the details and reviews microservices to populate the page.
details - the details microservice contains book information.
reviews - the reviews microservice contains book reviews. It also calls the ratings microservice.
ratings - the ratings microservice contains book ranking information that accompanies a book review.
There are 3 versions of the reviews microservice:
Version v1 - doesn’t call the ratings service .
Version v2 - calls the ratings service, and displays each rating as 1 to 5 black stars .
Version v3 - calls the ratings service, and displays each rating as 1 to 5 red stars .
Bookinfo application architecture
Deploy the demo of Bookinfo application:
Copy kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yaml
sleep 400 Confirm all services and pods are correctly defined and running:
Copy kubectl get svc,deployment,pods -o wide Output:
Copy NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/details ClusterIP 10.103.142.153 <none> 9080/TCP 4m21s app=details
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 75m <none>
service/productpage ClusterIP 10.111.62.53 <none> 9080/TCP 4m17s app=productpage
service/ratings ClusterIP 10.110.22.215 <none> 9080/TCP 4m20s app=ratings
service/reviews ClusterIP 10.100.73.81 <none> 9080/TCP 4m19s app=reviews
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.extensions/details-v1 1/1 1 1 4m21s details istio/examples-bookinfo-details-v1:1.8.0 app=details,version=v1
deployment.extensions/productpage-v1 1/1 1 1 4m16s productpage istio/examples-bookinfo-productpage-v1:1.8.0 app=productpage,version=v1
deployment.extensions/ratings-v1 1/1 1 1 4m20s ratings istio/examples-bookinfo-ratings-v1:1.8.0 app=ratings,version=v1
deployment.extensions/reviews-v1 1/1 1 1 4m19s reviews istio/examples-bookinfo-reviews-v1:1.8.0 app=reviews,version=v1
deployment.extensions/reviews-v2 1/1 1 1 4m18s reviews istio/examples-bookinfo-reviews-v2:1.8.0 app=reviews,version=v2
deployment.extensions/reviews-v3 1/1 1 1 4m18s reviews istio/examples-bookinfo-reviews-v3:1.8.0 app=reviews,version=v3
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/details-v1-68c7c8666d-pvrx6 2/2 Running 0 4m21s 10.244.1.20 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/elasticsearch-operator-sysctl-297j8 1/1 Running 0 45m 10.244.2.8 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/elasticsearch-operator-sysctl-bg8rn 1/1 Running 0 45m 10.244.1.10 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/elasticsearch-operator-sysctl-vwvbl 1/1 Running 0 45m 10.244.0.8 pruzicka-k8s-istio-demo-node01 <none> <none>
pod/productpage-v1-54d799c966-2b4ss 2/2 Running 0 4m16s 10.244.1.23 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/ratings-v1-8558d4458d-ln99n 2/2 Running 0 4m20s 10.244.1.21 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/reviews-v1-cb8655c75-hpqfg 2/2 Running 0 4m19s 10.244.1.22 pruzicka-k8s-istio-demo-node03 <none> <none>
pod/reviews-v2-7fc9bb6dcf-snshx 2/2 Running 0 4m18s 10.244.2.19 pruzicka-k8s-istio-demo-node02 <none> <none>
pod/reviews-v3-c995979bc-wcql9 2/2 Running 0 4m18s 10.244.0.12 pruzicka-k8s-istio-demo-node01 <none> <none> Check the container details - you should see also container istio-proxy next to productpage:
Copy kubectl describe pod -l app=productpage
kubectl logs $(kubectl get pod -l app=productpage -o jsonpath="{.items[0].metadata.name}") istio-proxy --tail=5 Define the Istio gateway for the application:
Copy cat samples/bookinfo/networking/bookinfo-gateway.yaml
kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml
sleep 5 Confirm the gateway has been created:
Copy kubectl get gateway,virtualservice Output:
Copy NAME AGE
gateway.networking.istio.io/bookinfo-gateway 11s
NAME AGE
virtualservice.networking.istio.io/bookinfo 12s Determining the ingress IP and ports when using a node port:
Copy export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath="{.spec.ports[?(@.name==\"http2\")].nodePort}")
export SECURE_INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath="{.spec.ports[?(@.name==\"https\")].nodePort}")
export INGRESS_HOST=$(kubectl get po -l istio=ingressgateway -n istio-system -o "jsonpath={.items[0].status.hostIP}")
if test -f ../../terraform.tfstate && grep -q vms_public_ip ../../terraform.tfstate; then
export INGRESS_HOST=$(terraform output -json -state=../../terraform.tfstate | jq -r ".vms_public_ip.value[0]")
fi
export GATEWAY_URL=$INGRESS_HOST:$INGRESS_PORT
echo "$INGRESS_PORT | $SECURE_INGRESS_PORT | $INGRESS_HOST | $GATEWAY_URL | http://$GATEWAY_URL/productpage" Output:
Copy 31380 | 31390 | 172.16.242.170 | 172.16.242.170:31380 Confirm the app is running:
Copy curl -o /dev/null -s -w "%{http_code}\n" -A "Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5" http://${GATEWAY_URL}/productpage Output:
Create default destination rules (subsets) for the Bookinfo services:
Copy kubectl apply -f samples/bookinfo/networking/destination-rule-all.yaml Display the destination rules:
Copy kubectl get destinationrules -o yaml Generate some traffic for next 5 minutes to gather some data:
Copy siege --log=/tmp/siege --concurrent=1 -q --internet --time=5M $GATEWAY_URL/productpage & Open the browser with these pages:
http://localhost:3000 (Grafana -> Home -> Istio -> Istio Performance Dashboard, Istio Service Dashboard, Istio Workload Dashboard)
Open the Bookinfo site in your browser http://$GATEWAY_URL/productpage and refresh the page several times - you should see different versions of reviews shown in productpage, presented in a round robin style (red stars, black stars, no stars), since we haven’t yet used Istio to control the version routing.
Check the flows in Kiali graph
Configuring Request Routing
https://istio.io/docs/tasks/traffic-management/request-routing/
Apply the virtual services which will route all traffic to v1 of each microservice:
Copy kubectl apply -f samples/bookinfo/networking/virtual-service-all-v1.yaml Display the defined routes:
Copy kubectl get virtualservices -o yaml Output:
Copy apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: details
...
spec:
hosts:
- details
http:
- route:
- destination:
host: details
subset: v1
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: productpage
...
spec:
gateways:
- bookinfo-gateway
- mesh
hosts:
- productpage
http:
- route:
- destination:
host: productpage
subset: v1
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: ratings
...
spec:
hosts:
- ratings
http:
- route:
- destination:
host: ratings
subset: v1
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: reviews
...
spec:
hosts:
- reviews
http:
- route:
- destination:
host: reviews
subset: v1
Open the Bookinfo site in your browser http://$GATEWAY_URL/productpage and notice that the reviews part of the page displays with no rating stars, no matter how many times you refresh.
Route based on user identity
https://istio.io/docs/tasks/traffic-management/request-routing/#route-based-on-user-identity
All traffic from a user named jason will be routed to the service reviews:v2 by forwarding HTTP requests with custom end-user header to the appropriate reviews service.
Enable user-based routing:
Copy kubectl apply -f samples/bookinfo/networking/virtual-service-reviews-test-v2.yaml Confirm the rule is created:
Copy kubectl get virtualservice reviews -o yaml Output:
Copy apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: reviews
...
spec:
hosts:
- reviews
http:
- match:
- headers:
end-user:
exact: jason
route:
- destination:
host: reviews
subset: v2
- route:
- destination:
host: reviews
subset: v1
On the /productpage of the Bookinfo app, log in as user jason and refresh the browser.
Log in as another user (pick any name you wish) and refresh the browser
You can do the same with user-agent header or URI for example:
Copy ...
http:
- match:
- headers:
user-agent:
regex: '.*Firefox.*'
...
http:
- match:
- uri:
prefix: /api/v1
... Injecting an HTTP delay fault
https://istio.io/docs/tasks/traffic-management/fault-injection/#injecting-an-http-delay-fault
Inject a 7 seconds delay between the reviews:v2 and ratings microservices for user jason:
Copy kubectl apply -f samples/bookinfo/networking/virtual-service-ratings-test-delay.yaml Confirm the rule was created:
Copy kubectl get virtualservice ratings -o yaml Output:
Copy apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: ratings
...
spec:
hosts:
- ratings
http:
- fault:
delay:
fixedDelay: 7s
percent: 100
match:
- headers:
end-user:
exact: jason
route:
- destination:
host: ratings
subset: v1
- route:
- destination:
host: ratings
subset: v1
On the /productpage, log in as user jason and you should see:
Copy Error fetching product reviews!
Sorry, product reviews are currently unavailable for this book.
Open the Developer Tools menu (F12) -> Network tab - web page actually loads in about 6 seconds.
The following example introduces a 5 second delay in 10% of the requests to the v1 version of the ratings microservice:
Copy apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: ratings
spec:
hosts:
- ratings
http:
- fault:
delay:
percent: 10
fixedDelay: 5s
route:
- destination:
host: ratings
subset: v1 Injecting an HTTP abort fault
https://istio.io/docs/tasks/traffic-management/fault-injection/#injecting-an-http-abort-fault
Let's introduce an HTTP abort to the ratings microservices for the test user jason.
Create a fault injection rule to send an HTTP abort for user jason:
Copy kubectl apply -f samples/bookinfo/networking/virtual-service-ratings-test-abort.yaml Confirm the rule was created:
Copy kubectl get virtualservice ratings -o yaml Output:
Copy apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: ratings
...
spec:
hosts:
- ratings
http:
- fault:
abort:
httpStatus: 500
percent: 100
match:
- headers:
end-user:
exact: jason
route:
- destination:
host: ratings
subset: v1
- route:
- destination:
host: ratings
subset: v1
On the /productpage, log in as user jason - the page loads immediately and the product ratings not available message appears.
Check the flows in Kiali graph
The following example returns an HTTP 400 error code for 10% of the requests to the ratings service v1:
Copy apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: ratings
spec:
hosts:
- ratings
http:
- fault:
abort:
percent: 10
httpStatus: 400
route:
- destination:
host: ratings
subset: v1 Weight-based routing
https://istio.io/docs/tasks/traffic-management/traffic-shifting/#apply-weight-based-routing
In Canary Deployments , newer versions of services are incrementally rolled out to users to minimize the risk and impact of any bugs introduced by the newer version.
Route a percentage of traffic to one service or another - send %50 of traffic to reviews:v1 and %50 to reviews:v3 and finally complete the migration by sending %100 of traffic to reviews:v3.
Route all traffic to the reviews:v1 version of each microservice:
Copy kubectl apply -f samples/bookinfo/networking/virtual-service-all-v1.yaml Transfer 50% of the traffic from reviews:v1 to reviews:v3:
Copy kubectl apply -f samples/bookinfo/networking/virtual-service-reviews-50-v3.yaml Confirm the rule was replaced:
Copy kubectl get virtualservice reviews -o yaml Output:
Copy apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: reviews
...
spec:
hosts:
- reviews
http:
- route:
- destination:
host: reviews
subset: v1
weight: 50
- destination:
host: reviews
subset: v3
weight: 50
Refresh the /productpage in your browser and you now see red colored star ratings approximately 50% of the time.
Check the flows in Kiali graph
Assuming you decide that the reviews:v3 microservice is stable, you can route 100% of the traffic to reviews:v3 by applying this virtual service.
Copy kubectl apply -f samples/bookinfo/networking/virtual-service-reviews-v3.yaml
When you refresh the /productpage you will always see book reviews with red colored star ratings for each review.
Mirroring
https://istio.io/docs/tasks/traffic-management/mirroring/
Mirroring sends a copy of live traffic to a mirrored service.
First all traffic will go to reviews:v1, then the rule will be applied to mirror a portion of traffic to reviews:v2.
Apply the virtual services which will route all traffic to v1 of each microservice:
Copy kubectl apply -f samples/bookinfo/networking/virtual-service-all-v1.yaml Change the route rule to mirror traffic to v2:
Copy cat <<EOF | kubectl apply -f -
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: reviews
spec:
hosts:
- reviews
http:
- route:
- destination:
host: reviews
subset: v1
weight: 100
mirror:
host: reviews
subset: v2
EOF Check the logs on both pods reviews:v1 and reviews:v2:
Copy byobu
byobu-tmux select-pane -t 0
byobu-tmux split-window -v
byobu-tmux select-pane -t 0
Copy kubectl logs $(kubectl get pod -l app=reviews,version=v1 -o jsonpath="{.items[0].metadata.name}") istio-proxy --tail=10
kubectl logs $(kubectl get pod -l app=reviews,version=v2 -o jsonpath="{.items[0].metadata.name}") istio-proxy --tail=10
Do a simple query by refreshing the page in the web browser.
Check the flows in Kiali graph
Cleanup
Remove the Bookinfo application and clean it up (delete the routing rules and terminate the application pods):
Copy # Clean everything - remove port-forward, Bookinfo application, all Istio VirtualServices, Gateways, DestinationRules
killall kubectl siege
sed -i "/read NAMESPACE/d" ./samples/bookinfo/platform/kube/cleanup.sh
./samples/bookinfo/platform/kube/cleanup.sh List of GUIs
Kibana
Copy kubectl -n logging port-forward $(kubectl -n logging get pod -l role=kibana -o jsonpath="{.items[0].metadata.name}") 5601:5601 & Link: https://localhost:5601
Cerebro
Copy kubectl -n logging port-forward $(kubectl -n logging get pod -l role=cerebro -o jsonpath="{.items[0].metadata.name}") 9000:9000 & Link: http://localhost:9000
Ceph Dashboard
Copy kubectl -n rook-ceph port-forward $(kubectl -n rook-ceph get pod -l app=rook-ceph-mgr -o jsonpath="{.items[0].metadata.name}") 8443:8443 & Login: admin
Password: kubectl -n rook-ceph get secret rook-ceph-dashboard-password -o yaml | grep "password:" | awk '{print $2}' | base64 --decode
Link: https://localhost:8443
Links
