Question

我正在使用Docker Compose尝试使用docker的图像 elk-docker （https://elk-docker.readthedocs.io/）。 .yml文件是这样的：

elk:
image: sebp/elk
ports:
  - "5601:5601"
  - "9200:9200"
  - "5044:5044"

当我运行命令：sudo docker-compose up时，控制台显示：

* Starting Elasticsearch Server
sysctl: setting key "vm.max_map_count": Read-only file system
...fail!
waiting for Elasticsearch to be up (1/30)
waiting for Elasticsearch to be up (2/30)
waiting for Elasticsearch to be up (3/30)
waiting for Elasticsearch to be up (4/30)
waiting for Elasticsearch to be up (5/30)
waiting for Elasticsearch to be up (6/30)
waiting for Elasticsearch to be up (7/30)
waiting for Elasticsearch to be up (8/30)
waiting for Elasticsearch to be up (9/30)
waiting for Elasticsearch to be up (10/30)
waiting for Elasticsearch to be up (11/30)
waiting for Elasticsearch to be up (12/30)
waiting for Elasticsearch to be up (13/30)
waiting for Elasticsearch to be up (14/30)
waiting for Elasticsearch to be up (15/30)
waiting for Elasticsearch to be up (16/30)
waiting for Elasticsearch to be up (17/30)
waiting for Elasticsearch to be up (18/30)
waiting for Elasticsearch to be up (19/30)
waiting for Elasticsearch to be up (20/30)
waiting for Elasticsearch to be up (21/30)
waiting for Elasticsearch to be up (22/30)
waiting for Elasticsearch to be up (23/30)
waiting for Elasticsearch to be up (24/30)
waiting for Elasticsearch to be up (25/30)
waiting for Elasticsearch to be up (26/30)
waiting for Elasticsearch to be up (27/30)
waiting for Elasticsearch to be up (28/30)
waiting for Elasticsearch to be up (29/30)
waiting for Elasticsearch to be up (30/30)
Couln't start Elasticsearch. Exiting.
Elasticsearch log follows below.
cat: /var/log/elasticsearch/elasticsearch.log: No such file or directory
docker_elk_1 exited with code 1

如何解决问题？

Answer 1

您可能需要在主机本身的vm.max_map_count中设置/etc/sysctl.conf，以便Elasticsearch不会尝试从容器内部执行此操作。如果您不知道所需的值，请尝试将当前设置加倍并继续运行，直到Elasticsearch成功启动。 Documentation recommends至少262144。

Answer 2

在Docker主机终端（Docker CLI）中运行命令：

docker-machine ssh
sudo sysctl -w vm.max_map_count=262144
exit

Answer 3

您可以通过两种方式做到这一点。

临时设置max_map_count ：
- sudo sysctl -w vm.max_map_count = 262144
  ，但这只能持续到重新启动系统为止。
表现
- 在您的主机中
  - vi /etc/sysctl.conf
  - 输入 vm.max_map_count = 262144
  - 重新启动

Answer 4

进入docker容器

# docker exec -it <container_id> /bin/bash

您可以查看当前的 max_map_count 值
```
# more /proc/sys/vm/max_map_count
```
临时集 max_map_count 值（容器（主机）重新启动不会持续存在 max_map_count 值）
```
# sysctl -w vm.max_map_count=262144
```

永久设置值

1. # vi /etc/sysctl.conf
     vm.max_map_count=262144

2. # vi /etc/rc.local 
     #put parameter inside rc.local file
     echo 262144 > /proc/sys/vm/max_map_count

Answer 5

您必须至少在262144中设置/etc/sysctl.conf中的 vm.max_map_count 变量

之后，您可以使用 sysctl --system

重新加载设置

Docker - ELK - vm.max_map_count

5 个答案: