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Docker exec on certain aws instances VERY slow

docker

(Pitthu) #1

Hi all

We are seeing that the ‘docker exec’ on certain aws instances takes very long resulting in our application timing out. Can someone help us debug this issue?

Good host:

real 0m0.276s
user 0m0.044s
sys 0m0.024s

Affected host:

real 0m18.184s
user 0m0.012s
sys 0m0.016s

Docker info on the affected host:
Containers: 12
Running: 5
Paused: 0
Stopped: 7
Images: 8
Server Version: 17.04.0-ce
Storage Driver: overlay
Backing Filesystem: xfs
Supports d_type: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc oci
Default Runtime: runc
Init Binary:
containerd version: (expected: 422e31ce907fd9c3833a38d7b8fdd023e5a76e73)
runc version: N/A (expected: 9c2d8d184e5da67c95d601382adf14862e4f2228)
init version: N/A (expected: 949e6facb77383876aeff8a6944dde66b3089574)
Security Options:
apparmor
Kernel Version: 3.12.74-60.64.69-default
Operating System: SUSE Linux Enterprise Server 12 SP1
OSType: linux
Architecture: x86_64
CPUs: 64
Total Memory: 478.9GiB
Name: ip-10-20-96-51
ID: 6IFZ:RJ2C:EBWP:EMHP:UQFJ:RMTY:ZLPH:2DHE:AM2X:R2IH:2EOO:6QSZ
Docker Root Dir: /docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false

WARNING: No swap limit support
WARNING: No kernel memory limit support

Docker version: Docker version 17.04.0-ce, build 78d1802

aws Host: r4.16xlarge

OS version:
NAME=“SLES”
VERSION=“12-SP1”
VERSION_ID=“12.1”
PRETTY_NAME=“SUSE Linux Enterprise Server 12 SP1”
ID=“sles”
ANSI_COLOR=“0;32”
CPE_NAME=“cpe:/o:suse:sles:12:sp1”