在Docker中更改共享内存的大小 [英] Changing shared memory size in docker compose
问题描述
我当前在一个容器中的共享内存出现了一些问题.
我有一个docker-compose文件,希望可以在其中设置大小.我基本上转换了一个旧的docker run,该运行具有-shm-size 16gb
.我想这就像将 shm_size:16gb
添加到撰写文件中的服务一样简单.
添加它只会给我以下信息:忽略不支持的选项:shm_size
.
我确实检查了
I'm currently having some issues with the shared memory in one of my containers.
I have a docker-compose file in where I expect to be able to set the size. I basically converted an old docker run that had a --shm-size 16gb
. I would guess it's as easy as adding shm_size:16gb
to my service in the compose file.
Adding it just gives me the info: Ignoring unsupported options: shm_size
.
I did check the docs, but it didn't really help me.
Just to clarify, it's not in the build but really for the "running" state.
Does one of you ever had this issue/know how to solve it?
Setup:
- docker swarm with 7 nodes
- Service should run on just a single node
- Only running stacks
- 64 GB RAM host
- 32 GB shm (host)
- Docker version 18.09.7, build 2d0083d
- Using v 3.7 in my compose file
Compose file:
version: "3.7"
services:
server:
shm_size: 16GB # <<<<<<< This fails
image: local_repo/my_app:v1-dev
command: run
environment:
- UPDATES=enabled
volumes:
- type: volume
source: data
target: /var/lib/my_app/
- type: volume
source: db
target: /var/lib/postgresql/10/main
networks:
- xxx_traefik
deploy:
mode: replicated
labels:
- traefik.docker.network=xxx_traefik
- traefik.enable=true
- traefik.port=80
- traefik.frontend.rule=Host:my_container.xxx.com
- traefik.backend.loadbalancer.stickiness=true
- traefik.protocol=http
replicas: 1
placement:
constraints:
- node.hostname==node2
volumes:
db:
external: true
data:
external: true
networks:
xxx_traefik:
external: true
# shm_size: 16GB <<<<<<< Also tried to put it here since documentation doesn't show indents
Any help is appreciated:)
It should be below service, I can verify it, but here is what offical documentation said
SHM_SIZE
Added in version 3.5 file format
Set the size of the /dev/shm partition for this build’s containers. Specify as an integer value representing the number of bytes or as a string expressing a byte value.
build:
context: .
shm_size: '2gb'
Here is test
version: '3.7'
services:
your_service:
image: alpine
command: ash -c "sleep 2 && df /dev/shm"
shm_size: 2gb
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