Reduced UN prod cluster resources

[dwnoble]

Metrics links:

• Requests per second
• Latency
• Resource usage for dc-mixer-observation
• Resource usage for dc-mixer-svg
• Resource usage for website-mixer-service
• Resource usage for dc-mixer-node
• Resource usage for dc-mixer-default
• Resource usage for website-service
• Monitoring dashboard: GKE Compute Resources Monitoring view: dc-mixer-observation

Changes

• Website: Drop from 50 nodes to 10 nodes (5gb/node) -> 50gb
• Mixer svg service: Drop from 5 nodes to 3 nodes (8gb/node) -> 24 gb
• Mixer node service: Drop from 30 nodes to 3 nodes (3gb/node ) -> 9gb
• Mixer observation service: Drop from 30 nodes to 3 nodes (2gb/node) -> 6gb
• Default node: Drop from 20 nodes to 3 nodes (8gb/ node memory requirement) 24gb
• Replace 18x e2-highmem-8 nodes with another 3x e2-highmem-4 nodes
• Old cluster total memory: 672gb
• Old cluster estimated memory allocation: 600gb
• New cluster total memory: 192gb
• New cluster estimated memory allocation: 113gb