Open
Description
Description
Running container with healthchecks causes high CPU utilisation.
Steps to reproduce the issue:
- Install OpenFaas https://docs.openfaas.com/deployment/docker-swarm/
- Login into the OpenFaas Web UI and install 2-3 functions
- nodeinfo
- sentimentanalysis
- Do not use the functions for the platform be idle
Describe the results you received:
The load on the Docker Node increases drastically just because of the health checks.
Describe the results you expected:
I would expect the load to be almost the same as not running any healthchecks.
Additional information you deem important (e.g. issue happens only occasionally):
Output of docker version:
# docker version
Client:
Version: 18.09.3
API version: 1.39
Go version: go1.10.8
Git commit: 774a1f4
Built: Thu Feb 28 06:40:58 2019
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 18.09.5
API version: 1.39 (minimum version 1.12)
Go version: go1.10.8
Git commit: e8ff056
Built: Thu Apr 11 04:10:53 2019
OS/Arch: linux/amd64
Experimental: false
Output of docker info:
# docker info
Containers: 10
Running: 8
Paused: 0
Stopped: 2
Images: 9
Server Version: 18.09.5
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: active
NodeID: ql2lpbvdhdbspzd6n2qsmip4n
Is Manager: true
ClusterID: a2f6d1mbqs1mczk8y88axzmpu
Managers: 1
Nodes: 1
Default Address Pool: 10.0.0.0/8
SubnetSize: 24
Orchestration:
Task History Retention Limit: 5
Raft:
Snapshot Interval: 10000
Number of Old Snapshots to Retain: 0
Heartbeat Tick: 1
Election Tick: 10
Dispatcher:
Heartbeat Period: 5 seconds
CA Configuration:
Expiry Duration: 3 months
Force Rotate: 0
Autolock Managers: false
Root Rotation In Progress: false
Node Address: 172.16.11.137
Manager Addresses:
172.16.11.137:2377
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: e6b3f5632f50dbc4e9cb6288d911bf4f5e95b18e
runc version: 6635b4f0c6af3810594d2770f662f34ddc15b40d
init version: fec3683
Security Options:
apparmor
seccomp
Profile: default
Kernel Version: 4.4.0-143-generic
Operating System: Ubuntu 16.04.6 LTS
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 1.936GiB
Name: openfaas
ID: DWEP:3RFR:F6EL:3DEP:SVRG:MMZ5:2KBT:5ZZQ:IWHZ:VAIJ:UMHA:4QIL
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
Product License: Community Engine
WARNING: No swap limit support
Additional environment details (AWS, VirtualBox, physical, etc.):
VM on VMware Fusion on Mac. Same results with a VM on KVM on Linux.