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idk i brought Istio and some other things

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Oriol
2023-04-08 18:41:41 +01:00
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# Simple examples
# Traffic path
## Istio Ingress Controller ---> Gateway -> Virtual Service (-> Destination Route) -> Ingress -> Deployment

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##### https://github.com/istio/istio/tree/master/samples/helloworld
# Simple Hello World
- 1 Service
- 1 Deployment
I think that by default uses `RANDOM`.
https://istio.io/latest/docs/reference/config/networking/destination-rule/#TrafficPolicy-PortTrafficPolicy
https://istio.io/latest/docs/reference/config/networking/destination-rule/#LoadBalancerSettings
Relies in automatic sidecar injection.
> Contains service account configurations, yet they are commented as not "necessary".
## Files
- deployment.yaml
- gateway.yaml
## deployment.yaml
### Creates
#### Service
- helloworld
#### Deployments
- helloworld-nginx (Nginx container)
## gateway.yaml
### Creates
#### Gateway
##### helloworld-gateway
###### Configuration
```yml
port: 80
istio-ingress: ingressgateway
hosts: "*"
```
#### VirtualService
##### helloworld-vs
###### Configuration
```yaml
hosts: "*"
uri: "/helloworld"
```
# Run example
## Deploy resources
```shell
$ kubectl apply -f ./
service/helloworld created
deployment.apps/helloworld-nginx created
gateway.networking.istio.io/helloworld-gateway created
virtualservice.networking.istio.io/helloworld-vs created
```
## Wait for the pods to be ready
(I think it deploys 2 pods as there is the Envoy Proxy pod besides the Nginx deployment)
```shell
$ kubectl get deployment helloworld-nginx -w
NAME READY UP-TO-DATE AVAILABLE AGE
helloworld-nginx 1/1 1 1 44s
```
## Test the service
### Get LB IP
```shell
$ kubectl get svc istio-ingressgateway -n istio-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
istio-ingressgateway LoadBalancer 10.97.47.216 192.168.1.50 15021:31316/TCP,80:32012/TCP,443:32486/TCP 39h
```
### Curl
```shell
$ curl 192.168.1.50/helloworld -s | grep "<title>.*</title>"  ✔
<title>Welcome to nginx!</title>
```

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Istio/simple/hello_world_1_service_1_deployment/deployment.yaml Normal file
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# https://github.com/istio/istio/blob/master/samples/helloworld/helloworld.yaml
apiVersion: v1
kind: Service
metadata:
name: helloworld
labels:
app: helloworld
service: helloworld
spec:
ports:
- port: 80
name: http
selector:
app: helloworld
---
#apiVersion: v1
#kind: ServiceAccount
#metadata:
# name: istio-helloworld
# labels:
# account:
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: helloworld-nginx
labels:
app: helloworld
spec:
replicas: 1
selector:
matchLabels:
app: helloworld
template:
metadata:
labels:
app: helloworld
spec:
# serviceAccountName: istio-helloworld
containers:
- name: helloworld
image: nginx
resources:
requests:
cpu: "100m"
imagePullPolicy: IfNotPresent #Always
ports:
- containerPort: 80

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Istio/simple/hello_world_1_service_1_deployment/gateway.yaml Normal file
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# https://github.com/istio/istio/blob/master/samples/helloworld/helloworld-gateway.yaml
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
name: helloworld-gateway
spec:
selector:
istio: ingressgateway # use istio default controller
servers:
- port:
number: 80
name: http
protocol: HTTP
hosts:
- "*"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: helloworld-vs
spec:
hosts:
- "*"
gateways:
- helloworld-gateway
http:
- match:
- uri:
exact: /helloworld
route:
- destination:
host: helloworld
port:
number: 80
rewrite:
uri: "/"

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Istio/simple/hello_world_1_service_2_deployments_managed_version/README.md Normal file
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##### https://github.com/istio/istio/tree/master/samples/helloworld
https://istio.io/latest/blog/2017/0.1-canary/
# Simple Hello World
- 1 Service
- 2 Versions
Iterates between the versions without any specific policy. (actually doesn't use the version for anything)
I think that by default uses `RANDOM`.
https://istio.io/latest/docs/reference/config/networking/destination-rule/#TrafficPolicy-PortTrafficPolicy
https://istio.io/latest/docs/reference/config/networking/destination-rule/#LoadBalancerSettings
Relies in automatic sidecar injection.
> Contains service account configurations, yet they are commented as not "necessary".
## Quick note
On this version I have "started" to use the full service name instead of the shorten version, aka:
```yaml
route:
- destination:
host: helloworld
```
Will be:
```yaml
route:
- destination:
host: helloworld.default.svc.cluster.local
```
It's overall a good practice to have, so not much of a reason to not do it.
https://istio.io/latest/docs/reference/config/networking/destination-rule/#DestinationRule
## Files
- deployment.yaml
- gateway.yaml
## deployment.yaml
### Creates
#### Service
- helloworld
#### Deployments
- helloworld-v1 (Nginx)
- helloworld-v2 (Apache)
## gateway.yaml
### Creates
#### Gateway
##### helloworld-gateway
###### Configuration
```yml
port: 80
istio-ingress: ingressgateway
hosts: "*"
```
#### VirtualService
##### helloworld-vs
###### Configuration
```yaml
hosts: "*"
uri: "/helloworld"
versions:
v1:
weight: "25%"
v2:
weight: "75%"
```
#### Destination Rule
###### Configuration
```yaml
```
# Run example
## Deploy resources
```shell
$ kubectl apply -f ./
service/helloworld created
deployment.apps/helloworld-v1 created
deployment.apps/helloworld-v2 created
gateway.networking.istio.io/helloworld-gateway created
virtualservice.networking.istio.io/helloworld-vs created
destinationrule.networking.istio.io/helloworld-destinationrule created
```
## Wait for the pods to be ready
(I think it deploys 2 pods as there is the Envoy Proxy pod besides the Nginx deployment)
```shell
$ kubectl get deployment helloworld-v{1..2} -w  ✔  kubernetes-admin@kubernetes ⎈
NAME READY UP-TO-DATE AVAILABLE AGE
helloworld-v1 1/1 1 1 4m1s
helloworld-v2 1/1 1 1 4m1s
```
## Test the service
### Get LB IP
```shell
$ kubectl get svc istio-ingressgateway -n istio-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
istio-ingressgateway LoadBalancer 10.97.47.216 192.168.1.50 15021:31316/TCP,80:32012/TCP,443:32486/TCP 39h
```
### Curl
Iterates between Nginx and Apache. Somwhat close to the ratio configured.
> Nginx instances (v1): 2 \
> Apache instances (v2): 9
```shell
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<h1>Welcome to nginx!</h1>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"
<h1>Welcome to nginx!</h1>
```

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Istio/simple/hello_world_1_service_2_deployments_managed_version/deployment.yaml Normal file
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# https://github.com/istio/istio/blob/master/samples/helloworld/helloworld.yaml
apiVersion: v1
kind: Service
metadata:
name: helloworld
labels:
app: helloworld
service: helloworld
spec:
ports:
- port: 80
name: http
selector:
app: helloworld
---
#apiVersion: v1
#kind: ServiceAccount
#metadata:
# name: istio-helloworld
# labels:
# account:
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: helloworld-v1
labels:
app: helloworld
version: v1
spec:
replicas: 1
selector:
matchLabels:
app: helloworld
version: v1
template:
metadata:
labels:
app: helloworld
version: v1
spec:
# serviceAccountName: istio-helloworld
containers:
- name: helloworld
image: nginx
resources:
requests:
cpu: "100m"
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: helloworld-v2
labels:
app: helloworld
version: v2
spec:
replicas: 1
selector:
matchLabels:
app: helloworld
version: v2
template:
metadata:
labels:
app: helloworld
version: v2
spec:
# serviceAccountName: istio-helloworld
containers:
- name: helloworld
image: httpd
resources:
requests:
cpu: "100m"
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---

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Istio/simple/hello_world_1_service_2_deployments_managed_version/gateway.yaml Normal file
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# https://github.com/istio/istio/blob/master/samples/helloworld/helloworld-gateway.yaml
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
name: helloworld-gateway
spec:
selector:
istio: ingressgateway # use istio default controller
servers:
- port:
number: 80
name: http
protocol: HTTP
hosts:
- "*"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: helloworld-vs
spec:
hosts:
- "*"
gateways:
- helloworld-gateway
http:
- match:
- uri:
exact: /helloworld
route:
- destination:
host: helloworld.default.svc.cluster.local
# host: helloworld
port:
number: 80
subset: v1
weight: 20
- destination:
# host: helloworld
host: helloworld.default.svc.cluster.local
port:
number: 80
subset: v2
weight: 80
rewrite:
uri: "/"
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: helloworld
spec:
# host: helloworld # destination service
host: helloworld.default.svc.cluster.local # Full destination service, lil better for consistency
subsets:
- name: v1
labels:
version: v1
- name: v2
labels:
version: v2

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Istio/simple/hello_world_1_service_2_deployments_unmanaged/README.md Normal file
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##### https://github.com/istio/istio/tree/master/samples/helloworld
# Simple Hello World
- 1 Service
- 2 Versions
Iterates between the versions without any specific policy. (actually doesn't use the version for anything)
I think that by default uses `RANDOM`.
https://istio.io/latest/docs/reference/config/networking/destination-rule/#TrafficPolicy-PortTrafficPolicy
https://istio.io/latest/docs/reference/config/networking/destination-rule/#LoadBalancerSettings
Relies in automatic sidecar injection.
> Contains service account configurations, yet they are commented as not "necessary".
## Files
- deployment.yaml
- gateway.yaml
## deployment.yaml
### Creates
#### Service
- helloworld
#### Deployments
- helloworld-v1 (Nginx)
- helloworld-v2 (Apache)
## gateway.yaml
### Creates
#### Gateway
##### helloworld-gateway
###### Configuration
```yml
port: 80
istio-ingress: ingressgateway
hosts: "*"
```
#### VirtualService
##### helloworld-vs
###### Configuration
```yaml
hosts: "*"
uri: "/helloworld"
```
# Run example
## Deploy resources
```shell
$ kubectl apply -f ./
service/helloworld created
deployment.apps/helloworld-v1 created
deployment.apps/helloworld-v2 created
deployment.apps/helloworld-v2 unchanged
gateway.networking.istio.io/helloworld-gateway created
virtualservice.networking.istio.io/helloworld-vs created
```
## Wait for the pods to be ready
(I think it deploys 2 pods as there is the Envoy Proxy pod besides the Nginx deployment)
```shell
$ kubectl get deployment helloworld-v{1..2} -w  ✔  kubernetes-admin@kubernetes ⎈
NAME READY UP-TO-DATE AVAILABLE AGE
helloworld-v1 1/1 1 1 4m1s
helloworld-v2 1/1 1 1 4m1s
```
## Test the service
### Get LB IP
```shell
$ kubectl get svc istio-ingressgateway -n istio-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
istio-ingressgateway LoadBalancer 10.97.47.216 192.168.1.50 15021:31316/TCP,80:32012/TCP,443:32486/TCP 39h
```
### Curl
Iterates randomly between Nginx and Apache
```shell
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<h1>Welcome to nginx!</h1>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<h1>Welcome to nginx!</h1>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<h1>Welcome to nginx!</h1>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<h1>Welcome to nginx!</h1>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<h1>Welcome to nginx!</h1>
$ curl 192.168.1.50/helloworld -s | grep "<h1>.*</h1>"  ✔
<html><body><h1>It works!</h1></body></html>
```

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Istio/simple/hello_world_1_service_2_deployments_unmanaged/deployment.yaml Normal file
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# https://github.com/istio/istio/blob/master/samples/helloworld/helloworld.yaml
apiVersion: v1
kind: Service
metadata:
name: helloworld
labels:
app: helloworld
service: helloworld
spec:
ports:
- port: 80
name: http
selector:
app: helloworld
---
#apiVersion: v1
#kind: ServiceAccount
#metadata:
# name: istio-helloworld
# labels:
# account:
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: helloworld-v1
labels:
app: helloworld
spec:
replicas: 1
selector:
matchLabels:
app: helloworld
template:
metadata:
labels:
app: helloworld
spec:
# serviceAccountName: istio-helloworld
containers:
- name: helloworld
image: nginx
resources:
requests:
cpu: "100m"
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: helloworld-v2
labels:
app: helloworld
spec:
replicas: 1
selector:
matchLabels:
app: helloworld
template:
metadata:
labels:
app: helloworld
spec:
# serviceAccountName: istio-helloworld
containers:
- name: helloworld
image: httpd
resources:
requests:
cpu: "100m"
imagePullPolicy: IfNotPresent
ports:
- containerPort: 80
---

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# https://github.com/istio/istio/blob/master/samples/helloworld/helloworld-gateway.yaml
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
name: helloworld-gateway
spec:
selector:
istio: ingressgateway # use istio default controller
servers:
- port:
number: 80
name: http
protocol: HTTP
hosts:
- "*"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: helloworld-vs
spec:
hosts:
- "*"
gateways:
- helloworld-gateway
http:
- match:
- uri:
exact: /helloworld
route:
- destination:
host: helloworld
port:
number: 80
rewrite:
uri: "/"