https://quicktasks.ismael.casimpan.com/tags/container/Recent content in container on IT QuicktasksHugo -- gohugo.ioCopyright © 2018–2022, Ismael Casimpan Jr.; All Rights ReservedSun, 27 Mar 2022 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/docker-mysql-backup-to-local/Sun, 27 Mar 2022 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/docker-mysql-backup-to-local/ Doing a backup of your mysql container's DB can be automated just like any other task. Script below is one way to do it. You may or may not provide a parameter to the script and you'll always get the gzipped version of the backup + its sha256 checksum. Sample Use Case: use it without parameters 1~$ ./backup_db.sh 2[INFO] DB backup for 'cooltool_db' copied to /home/icasimpan/work/backups... 3[INFO] Checking for backup integrity: 4cooltool_db-backup-2022.https://quicktasks.ismael.casimpan.com/post/docker-container-using-volume/Mon, 21 Mar 2022 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/docker-container-using-volume/ Sometimes, you may need to know which container a volume is associated with. Use this command: 1docker ps -a --filter volume=VOLUME_NAME_OR_MOUNT_POINT See https://stackoverflow.com/questions/42857575/how-to-determine-what-containers-use-the-docker-volumehttps://quicktasks.ismael.casimpan.com/post/run-command-from-container-instead-of-locally/Thu, 29 Jul 2021 11:29:00 +0800https://quicktasks.ismael.casimpan.com/post/run-command-from-container-instead-of-locally/ I encounter an issue where I don't have local composer installed but I need to run one. Solution is to run it on the fly from docker container: 1docker run --rm --interactive --tty --volume <directory_path_to_your_composer.json>:/app composer installhttps://quicktasks.ismael.casimpan.com/post/ssh-to-docker-container/Thu, 13 Aug 2020 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/ssh-to-docker-container/ Check first the names of your container: 1docker ps Technically though, it's just running a shell, so run as follows: 1docker exec -it <container-name> /bin/bash In case you see this error: 1OCI runtime exec failed: exec failed: container_linux.go:349: starting container process caused "exec: \"/bin/bash\": stat /bin/bash: no such file or directory": unknown You can probe a little and check any available shell. Run: 1docker exec -it <container-name> ls -l /bin/ You may recognize a few shell like:https://quicktasks.ismael.casimpan.com/post/bind-container-port-to-host-port/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/bind-container-port-to-host-port/ 1docker run -d --name testOnly -p 6379:6379 redis:latest NOTE: Always read the format of -p as host:container.https://quicktasks.ismael.casimpan.com/post/check-all-running-docker-process/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/check-all-running-docker-process/ 1docker ps -ahttps://quicktasks.ismael.casimpan.com/post/check-logs-of-container/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/check-logs-of-container/ 1docker logs <friendly-name|container-id> You can tail it much like tailing ordinary logs: 1docker logs -f --tail=5 <friendly-name|container-id> which means: "start tailing at current last 5 entries of the logs"https://quicktasks.ismael.casimpan.com/post/docker-build-cannot-connect-to-internet/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/docker-build-cannot-connect-to-internet/ Example scenario: 1[root@selenium php-5.1.2]# docker build -t php5_1_2 . 2Sending build context to Docker daemon 8.071MB 3Step 1/9 : FROM nubs/arch-build 4---> a68cd3855bfe 5Step 2/9 : MAINTAINER Spencer Rinehart <anubis@overthemonkey.com> 6---> Using cache 7---> 0d099a2cd179 8Step 3/9 : COPY php/PKGBUILD php/*.patch /package/ 9---> Using cache 10---> e9a68b923b81 11Step 4/9 : RUN makepkg --force 12---> Running in 22c4f167216a 13==> Making package: php 5.1.2-1 (Wed May 9 21:15:05 UTC 2018) 14==> Checking runtime dependencies.https://quicktasks.ismael.casimpan.com/post/docker-files-within-filesystem/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/docker-files-within-filesystem/ Location in 1/var/lib/dockerhttps://quicktasks.ismael.casimpan.com/post/force-remove-docker-images/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/force-remove-docker-images/ 1[root@selenium02 ~]# docker rmi ad66a5961263 2Error response from daemon: conflict: unable to delete ad66a5961263 (must be forced) - image is being used by stopped container 088219585a61 3[root@selenium02 ~]# docker rmi -f ad66a5961263https://quicktasks.ismael.casimpan.com/post/getting-started-in-docker/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/getting-started-in-docker/ See details in https://docs.docker.com/get-started/https://quicktasks.ismael.casimpan.com/post/how-to-login-dockerhub/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/how-to-login-dockerhub/ 1docker loginhttps://quicktasks.ismael.casimpan.com/post/install-docker-compose/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/install-docker-compose/ 1sudo yum install epel-release 2sudo yum install -y python-pip 3sudo pip install docker-compose Further details in https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-compose-on-centos-7 A more straightforward installation is by getting the binary directly via https://github.com/docker/compose/releases For example, if you have an x86_64 linux, get the said version 1~$ curl -o docker -OL https://github.com/docker/compose/releases/download/v2.10.2/docker-compose-linux-x86_64; chmod u+x docker 2~$ sudo mv docker /usr/local/binhttps://quicktasks.ismael.casimpan.com/post/more-details-about-container/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/more-details-about-container/ 1docker inspect <friendly-name|container-id>https://quicktasks.ismael.casimpan.com/post/remove-all-docker-containers/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/remove-all-docker-containers/ 1docker stop $(docker ps -a -q) 2docker rm $(docker ps -a -q) Details in https://coderwall.com/p/ewk0mq/stop-remove-all-docker-containershttps://quicktasks.ismael.casimpan.com/post/removing-docker0-interface/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/removing-docker0-interface/ If you see something like: 1root@example.com:/etc/apache2/sites-enabled# ifconfig 2docker0 Link encap:Ethernet HWaddr 02:42:8e:e1:53:84 3inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0 4UP BROADCAST MULTICAST MTU:1500 Metric:1 5RX packets:0 errors:0 dropped:0 overruns:0 frame:0 6TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 7collisions:0 txqueuelen:0 8RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) And you're sure you don't need it, remove it using 1ip link del docker0 See https://superuser.com/questions/995373/remove-docker0-bridgehttps://quicktasks.ismael.casimpan.com/post/rerun-docker-container-instance/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/rerun-docker-container-instance/ Given these: 1[root@selenium php-5.1.2]# docker ps -a 2CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 37e89768a78f9 e9a68b923b81 "/bin/sh -c 'makepkg…" 7 minutes ago Exited (1) 4 minutes ago nostalgic_lovelace 4af5262bdb8c1 selenium/node-chrome:2.53.1-beryllium "/opt/bin/entry_poin…" 4 weeks ago Up 4 weeks seleniumhub_chrome_5 53d788ffebc32 selenium/node-chrome:2.53.1-beryllium "/opt/bin/entry_poin…" 4 weeks ago Up 4 weeks seleniumhub_chrome_2 60bb97cb44ccd selenium/node-chrome:2.53.1-beryllium "/opt/bin/entry_poin…" 4 weeks ago Up 4 weeks seleniumhub_chrome_3 7982e0a223e1e selenium/node-chrome:2.53.1-beryllium "/opt/bin/entry_poin…" 4 weeks ago Up 4 weeks seleniumhub_chrome_1 8b4a2a19f9e80 selenium/node-chrome:2.https://quicktasks.ismael.casimpan.com/post/run-container-as-daemon/Tue, 24 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/run-container-as-daemon/ 1docker run -d --name redisDynamic -p 6379 redis:latest this will bind though to host port at random. To check bound port, use 1docker port redisDynamic 6379https://quicktasks.ismael.casimpan.com/post/dockerfile-install-php-module/Sat, 21 Sep 2019 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/dockerfile-install-php-module/ Add this to Dockerfile 1RUN docker-php-ext-install mysqli See details in https://github.com/docker-library/php/issues/279