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AN OVERVIEW OF
HEALTH CHECK PATTERNS
0
0.2
0.4
0.6
0.8
1
0 1 2 3 4 5
RELIABILITY
TIME
CPU
RAM
Network
Disk
99%
99%
99%
99%
96%
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CLIENT SERVER DB
99%
99%
99%
99%
99%
99%
99%
99%
99%
99%
99%
99%
CLIENT SERVER DB
88.5%
× bugs
× config issue
× synchronization failed
× memory leak
× thread leak
× pool misconfigurations
× deadlocks
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
HEALTH CHECK?
CPU
RAM
Network
Disk
? TELL?
LIE?
!ACTION
!ACTION
TELL?
LIE?
DEFAULTS
RETRIES
FALLBACKS
CIRCUIT
BREAKER
TIMEOUTS
TELL?
LIE?
?
?
?
PATTERNS!
RESTARTS
ALERTING
ALERTING
Interval = 5m Interval = 1m
TRAFFIC SHAPING
DEPLOYMENTS
× bugs
× config issue
× pool misconfigurations
× deadlocks
✓ memory leak
✓ thread leak
RESTARTS
TRAFFIC SHAPING
CPU
RAM
Network
Disk
CONNECTION POOL ISSUES
× timeout
× invalid connections
× blocked threads
× unbounded pool
× overflooding
× thread / memory leaks
ALERTING
DEPLOYMENTS
× bugs
× config issue
× pool misconfigurations
× deadlocks
✓ memory leak
✓ thread leak
RESTARTS & DEPLOYMENTS
FAIL OPEN
CPU
RAM
Network
Disk
CPU
RAM
Network
Disk
TRAFFIC SHAPING
CPU
RAM
Network
Disk
PROBING
CPU
RAM
Network
Disk
PROBING
✓ memory leak
✓ thread leak
✓ pool misconfigurations
✓ bugs
✓ config issue
✓ deadlocks
TRAFFIC SHAPING
ALERTING
✓ memory leak
✓ thread leak
✓ pool misconfigurations
✓ bugs
✓ config issue
✓ deadlocks
DEMO!
CPU
RAM
Network
Disk
Envoy
THANK YOU! ORESZTÉSZ MARGARITISZ
@gitaroktato
https://www.linkedin.com/in/oresztesz
gitaroktato

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Overview of health-check patterns