DevOps: How to implement Canary deployments without Service Mesh?

1# Stable Ingress
2apiVersion: networking.k8s.io/v1
3kind: Ingress
4metadata:
5  name: myapp-stable
6spec:
7  rules:
8    - host: myapp.com
9      http:
10        paths:
11          - path: /
12            pathType: Prefix
13            backend:
14              service:
15                name: myapp-stable
16                port:
17                  number: 80
18---
19# Canary Ingress
20apiVersion: networking.k8s.io/v1
21kind: Ingress
22metadata:
23  name: myapp-canary
24  annotations:
25    nginx.ingress.kubernetes.io/canary: "true"
26    nginx.ingress.kubernetes.io/canary-weight: "10"
27spec:
28  rules:
29    - host: myapp.com
30      http:
31        paths:
32          - path: /
33            pathType: Prefix
34            backend:
35              service:
36                name: myapp-canary
37                port:
38                  number: 80

1annotations:
2  nginx.ingress.kubernetes.io/canary: "true"
3  nginx.ingress.kubernetes.io/canary-by-header: "X-Canary"
4  nginx.ingress.kubernetes.io/canary-by-header-value: "always"

1annotations:
2  nginx.ingress.kubernetes.io/canary: "true"
3  nginx.ingress.kubernetes.io/canary-by-cookie: "canary_cookie"

1strategy:
2  canary:
3    canaryService: myapp-canary
4    stableService: myapp-stable
5    trafficRouting:
6      nginx:
7        stableIngress: myapp-stable
8        additionalIngressAnnotations:
9          canary-by-header: X-Canary