k8s: Deploy jaeger-agent as a Daemonset instead of sidecar container

Created by: beyang

From Yuri Shkuro (the main jaeger dev) on deploying jaeger-agent as a Daemonset vs sidecar container:

It's certainly possible and even recommended. A sidecar deployment for jaeger-agent is only useful in multi-tenant scenarios. See this blog post for discussion on various deployment options: https://medium.com/jaegertracing/deployment-strategies-for-the-jaeger-agent-1d6f91796d09

Reasons:

• 1 daemonset per node is typically less than 1 sidecar per pod
• Jaeger OOMing will not cause the whole pod (including the actual service) to be evicted