[英]Mongorestore in a Dockerfile
我想创建一个启动 mongo 服务器并在启动时自动从以前的mongodump
恢复的 Docker 映像。
这是我的图像的 Dockerfile:
FROM mongo
COPY dump /home/dump
CMD mongorestore /home/dump
当我运行这个时,我遇到了这个错误:
Failed: error connecting to db server: no reachable servers
有没有办法让mongorestore
命令通过 Docker 运行?
在这个答案、Marc Young 的答案和 Dockerfile 参考的帮助下,我能够完成这项工作。
Dockerfile
FROM mongo
COPY dump /home/dump
COPY mongo.sh /home/mongo.sh
RUN chmod 777 /home/mongo.sh
CMD /home/mongo.sh
mongo.sh
#!/bin/bash
# Initialize a mongo data folder and logfile
mkdir -p /data/db
touch /var/log/mongodb.log
chmod 777 /var/log/mongodb.log
# Start mongodb with logging
# --logpath Without this mongod will output all log information to the standard output.
# --logappend Ensure mongod appends new entries to the end of the logfile. We create it first so that the below tail always finds something
/entrypoint.sh mongod --logpath /var/log/mongodb.log --logappend &
# Wait until mongo logs that it's ready (or timeout after 60s)
COUNTER=0
grep -q 'waiting for connections on port' /var/log/mongodb.log
while [[ $? -ne 0 && $COUNTER -lt 60 ]] ; do
sleep 2
let COUNTER+=2
echo "Waiting for mongo to initialize... ($COUNTER seconds so far)"
grep -q 'waiting for connections on port' /var/log/mongodb.log
done
# Restore from dump
mongorestore --drop /home/dump
# Keep container running
tail -f /dev/null
这是一个老问题,上面的解决方案仍然可以工作,但在以后的版本中,您可以在/docker-entrypoint-initdb.d/
添加.sh和.js脚本,这将在实例首次加载时执行( /data/db
为空)。
现在,Dockerfile 可能看起来像:
FROM mongo
COPY ./data-dump/ /tmp/dump/mydb/
COPY ./import_data.sh /docker-entrypoint-initdb.d/import_data.sh
CMD chmod 777 /docker-entrypoint-initdb.d/import_data.sh #this is probably too permissive
这样,第一次启动容器时, import_data.sh
任何内容(或您在那里拥有的任何其他文件)都将运行。
# change the mongorestore command to match your case, adding user/password and other options.
mongorestore /tmp/dump # note we can possibly restore many DBs.
此处记录在初始化新实例部分下
与 RyanNHG 类似的解决方案,但没有 sh 文件。
Dockerfile
FROM mongo:3.6.8
COPY dump/ /tmp/dump/
CMD mongod --fork --logpath /var/log/mongodb.log; \
mongorestore /tmp/dump/; \
mongod --shutdown; \
docker-entrypoint.sh mongod
问题不在于docker。
如果您查看mongo的dockerfile,它会运行CMD ["mongod"]
来启动 mongo 服务。
你说FROM MONGO
但你覆盖了CMD
行。 这意味着 mongo 从未通过mongod
启动。 所以试试CMD mongod; mongorestore /home/dump
CMD mongod; mongorestore /home/dump
您可能不想将其用于生产,但它可以满足您的需求:
== Dockerfile ==
FROM mongo:3
COPY restore.sh /restore.sh
COPY ./mongodump /dump/
ENTRYPOINT /restore.sh
那么
== restore.sh ==
#!/usr/bin/env bash
# Execute restore in the background after 5s
# https://docs.docker.com/engine/reference/run/#detached--d
sleep 5 && mongorestore /dump &
# Keep mongod in the foreground, otherwise the container will stop
docker-entrypoint.sh mongod
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