在带有变量的 Docker 容器中运行命令

Question

I am using a docker-compose type of scenario. I would like to back up the database for partkeepr on a nightly basis. I can get a bash shell by doing a docker exec -it docker-partkeer_database_1 bash into the container and run the mysqldump command just fine but I can't run it successfully as a docker exec type of function.

I run docker exec -it docker-partkeepr_database_1 bash -c mysqldump --databases partkeepr -upartkeepr -pUSERPASSWORD > /var/lib/mysql/backup/partkeeprsql.$(date +%Y-%m-%d-%H.%M.%S).sql .

That date part on the end works just fine when I already have gotten in with a bash shell in the container but not outside of it. I can run the command as written without the date part just fine but I need the date so I can have multiple backups.

The system errors with -bash: /var/lib/mysql/backup/partkeeprsql.$(date +%Y-%m-%d-%H.%M.%S).sql: No such file or directory .

Have any ideas?

Answer 1

I found out the answer to my question. I didn't wrap the command after the bash -c in ""'s. Once I ran the command below it worked like a charm. I just wanted everyone to know the answer that I figured out.

docker exec -it docker-partkeepr_database_1 bash -c "mysqldump --databases partkeepr -upartkeepr - pUSERPASSWORD > /var/lib/mysql/backup/partkeeprsql.$(date +%Y-%m-%d-%H.%M.%S).sql"