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Converting Your Dev Environment to a Docker Stack - Cascadia

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Heard a lot about docker but not sure where to start? In this presentation we will go over the simplest ways to convert your development environment over to a docker stack, including support for full acceptance testing with Selenium. We’ll then go over how to modify the stack to mimic your production/pre-production environment(s) as closely as possible, and demystify working with the containers in the stack.

Converting Your Dev Environment to a Docker Stack - Cascadia

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Converting Your Dev Environment
to a Docker Stack
Dana Luther
https://joind.in/talk/3d360
https://git.io/Je3qd
@danaluther
Consolidated Work Stack
PHP 7.0 FPM
NGINX
MySQL
Consolidated Work Stack
Friend A
PHP 5.6
Apache
MySQL
PHP 7.0 FPM
NGINX
MySQL
Consolidated Work Stack
Friend A
PHP 5.6
Apache
MySQL
Cause B
PHP 7.1 FPM
NGINX
MySQL
PHP 7.0 FPM
NGINX
MySQL
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Application
Licensed
Application
PHP 5.6
Apache
MySQL 5.3
Client A

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Converting Your Dev Environment to a Docker Stack - Cascadia

  • 1. Converting Your Dev Environment to a Docker Stack Dana Luther https://joind.in/talk/3d360 https://git.io/Je3qd @danaluther
  • 2. Consolidated Work Stack PHP 7.0 FPM NGINX MySQL
  • 3. Consolidated Work Stack Friend A PHP 5.6 Apache MySQL PHP 7.0 FPM NGINX MySQL
  • 4. Consolidated Work Stack Friend A PHP 5.6 Apache MySQL Cause B PHP 7.1 FPM NGINX MySQL PHP 7.0 FPM NGINX MySQL
  • 7. Licensed Application PHP 5.6 Apache MySQL 5.3 Client A Client B PHP 7.1 Apache MySQL 5.4
  • 8. Licensed Application Client C PHP 5.6 FPM NGINX MySQL 5.2 PHP 5.6 Apache MySQL 5.3 Client A Client B PHP 7.1 Apache MySQL 5.4
  • 9. Licensed Application Client D PHP 7.1 FPM NGINX MySQL 5.3 Client C PHP 5.6 FPM NGINX MySQL 5.2 PHP 5.6 Apache MySQL 5.3 Client A Client B PHP 7.1 Apache MySQL 5.4
  • 14. So, how does that work??? 🤔 ? ? ? ?
  • 15. docker-compose.yml Docker Compose Version Services in the Stack Configurations, Secrets, Storage Volumes, etc. Version: “3.7” services: nginx: image: nginx command: [ 'sh', '-c', "exec nginx -g 'daemon off;'" ] … php: image: php:7.2-fpm … network: web_frontend config: nginx.conf: file: ./nginx/nginx.conf volumes: …https://docs.docker.com/compose/compose-file/
  • 17. SIDEBAR:The Docker Hierarchy Image Container Service Stack
  • 18. SIDEBAR:The Docker Hierarchy Image Container Service Stack Node Swarm
  • 19. > docker stack deploy … Swarm NODE 1 NODE 2 ETC. PHP 1 MySQL NGINX PHP 2
  • 20. SIDEBAR:Docker Command Syntax docker (object) (action) (args)
  • 21. SIDEBAR:Docker Command Syntax docker (object) (action) (args) > docker container ls
  • 22. SIDEBAR:Docker Command Syntax docker (object) (action) (args) > docker container ls > docker image ls
  • 23. SIDEBAR:Docker Command Syntax docker (object) (action) (args) > docker container ls > docker image ls > docker service ls
  • 24. SIDEBAR:Docker Command Syntax docker (object) (action) (args) > docker container ls > docker image ls > docker service ls > docker volume ls
  • 25. SIDEBAR:Docker Command Syntax docker (object) (action) (args) > docker container ls > docker image ls > docker service ls > docker volume ls image container stack service config network node plugin swarm Objects
  • 26. SIDEBAR:Docker Command Syntax docker (object) (action) (args) > docker container ls > docker image ls > docker service ls > docker volume ls image container stack service config network node plugin swarm Objects ls ps prune inspect create remove / rm Common Actions
  • 28. Node Manager A SWARM OF ONE > docker swarm init
  • 29. Node Manager A SWARM OF ONE > docker swarm init
  • 30. ⚠ Common “Gotcha” Swarm init — ONE TIME ONLY * THE SWARM PERSISTS *
  • 31. ⚠ Common “Gotcha” Swarm init — ONE TIME ONLY * THE SWARM PERSISTS * > docker swarm leave
  • 32. ⚠ Common “Gotcha” Swarm init — ONE TIME ONLY * THE SWARM PERSISTS * > docker swarm leave > docker swarm leave —force
  • 34. POPQUIZ! A. What’s the difference between a container and a service?
  • 35. POPQUIZ! A. What’s the difference between a container and a service? B. What’s the difference between a service and a stack?
  • 41. Images for Automated Testing selenium/standalone-chrome-debug selenium/standalone-firefox-debug:2.53.0 acceptance.suite.yml docker-compose.yml
  • 42. Images for Automated Testing selenium/standalone-chrome-debug selenium/standalone-firefox-debug:2.53.0 acceptance.suite.yml docker-compose.yml
  • 43. SIDEBAR:Legacy images, containers, volumes > docker image prune > docker container prune > docker (whatever) prune
  • 44. SIDEBAR:Legacy images, containers, volumes > docker image prune > docker container prune > docker (whatever) prune > docker system prune
  • 45. SIDEBAR:Legacy images, containers, volumes > docker image prune > docker container prune > docker (whatever) prune > docker system prune
  • 46. SIDEBAR:Legacy images, containers, volumes > docker image prune > docker container prune > docker (whatever) prune > docker system prune
  • 47. SIDEBAR:Legacy images, containers, volumes > docker image prune > docker container prune > docker (whatever) prune > docker system prune
  • 48. version: “3.7” services: nginx: image: nginx networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “Nginx Service” volumes: - ./public_html:/var/ www/html configs: - source: mysite target: /etc/nginx/conf.d/mysite.conf ports: - “80:80” - “443:443” depends_on: - php - db labels: com.envisageinternational.desc: “Nginx Container” command: [‘sh’,'-c',"exec nginx -g 'daemon off;’”] db: image: mysql ports: - “3306:3306” networks: - web secrets: - db_pwd deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: [ node.role == manager ] environment: - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/db_pwd php: image: php:7.0-fpm networks: - web depends_on: - db deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-FPM Service” ports: - “9000:9000” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-FPM Container” php-cli: image: php:7.0-cli networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-CLI Service” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-CLI Container” command: [‘bin/sh’, ‘-c’, “sleep infinity”] networks: web: configs: mysite: file: ./mysite.conf secrets: db_pwd: file: ./root_db_password.txt PHP 7.0 FPM NGINX MySQL
  • 49. php: image: php:7.0-fpm networks: - web depends_on: - db deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-FPM Service” ports: - “9000:9000” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-FPM Container” php-cli: image: php:7.0-cli networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-CLI Service” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-CLI Container” command: [‘bin/sh’, ‘-c’, “sleep infinity”] networks: web: configs: mysite: file: ./mysite.conf secrets: db_pwd: file: ./root_db_password.txt version: “3.7” services: nginx: image: nginx networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “Nginx Service” volumes: - ./public_html:/var/ www/html configs: - source: mysite target: /etc/nginx/conf.d/mysite.conf ports: - “80:80” - “443:443” depends_on: - php - db labels: com.envisageinternational.desc: “Nginx Container” command: [‘sh’,'-c',"exec nginx -g 'daemon off;’”] db: image: mysql ports: - “3306:3306” networks: - web secrets: - db_pwd deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: [ node.role == manager ] environment: - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/db_pwd PHP 7.0 FPM NGINX MySQL
  • 50. php: image: php:7.0-fpm networks: - web depends_on: - db deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-FPM Service” ports: - “9000:9000” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-FPM Container” php-cli: image: php:7.0-cli networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-CLI Service” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-CLI Container” command: [‘bin/sh’, ‘-c’, “sleep infinity”] networks: web: configs: mysite: file: ./mysite.conf secrets: db_pwd: file: ./root_db_password.txt nginx: image: nginx networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “Nginx Service” volumes: - ./public_html:/var/ www/html configs: - source: mysite target: /etc/nginx/conf.d/mysite.conf ports: - “80:80” - “443:443” depends_on: - php - db labels: com.envisageinternational.desc: “Nginx Container” command: [‘sh’,'-c',"exec nginx -g 'daemon off;’”] PHP 7.0 FPM NGINX MySQL
  • 51. php: image: php:7.0-fpm networks: - web depends_on: - db deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-FPM Service” ports: - “9000:9000” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-FPM Container” php-cli: image: php:7.0-cli networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-CLI Service” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-CLI Container” command: [‘bin/sh’, ‘-c’, “sleep infinity”] networks: web: configs: mysite: file: ./mysite.conf secrets: db_pwd: file: ./root_db_password.txt nginx: image: nginx networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “Nginx Service” volumes: - ./public_html:/var/ www/html configs: - source: mysite target: /etc/nginx/conf.d/mysite.conf ports: - “80:80” - “443:443” depends_on: - php - db labels: com.envisageinternational.desc: “Nginx Container” command: [‘sh’,'-c',"exec nginx -g 'daemon off;’”] PHP 7.0 FPM NGINX MySQL
  • 52. SIDEBAR:LABELS — use them everywhere! 🤔 ? ? ? ? The -f toggle -f name=vm_php -f label=com.envisage.desc=php
  • 53. SIDEBAR:LABELS — use them everywhere! 🤔 ? ? ? ? The -f toggle -f name=vm_php -f label=com.envisage.desc=php
  • 54. SIDEBAR:LABELS — use them everywhere! 🤔 ? ? ? ? The -f toggle -f name=vm_php -f label=com.envisage.desc=php
  • 55. SIDEBAR:LABELS — use them everywhere! 🤔 ? ? ? ? The -f toggle -f name=vm_php -f label=com.envisage.desc=php
  • 56. version: “3.7” services: nginx: image: nginx networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “Nginx Service” volumes: - ./public_html:/var/ www/html configs: - source: mysite target: /etc/nginx/conf.d/mysite.conf ports: - “80:80” - “443:443” depends_on: - php - db labels: com.envisageinternational.desc: “Nginx Container” command: [‘sh’,'-c',"exec nginx -g 'daemon off;’”] db: image: mysql ports: - “3306:3306” networks: - web secrets: - db_pwd deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: [ node.role == manager ] environment: - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/db_pwd php: image: php:7.0-fpm networks: - web depends_on: - db deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-FPM Service” ports: - “9000:9000” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-FPM Container” php-cli: image: php:7.0-cli networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-CLI Service” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-CLI Container” command: [‘bin/sh’, ‘-c’, “sleep infinity”] networks: web: configs: mysite: file: ./mysite.conf secrets: db_pwd: file: ./root_db_password.txt PHP 7.0 FPM NGINX MySQL
  • 57. Volume Example for php php: volumes: - ./public_html:/var/ www/html Local path relative to the file Path location within the container
  • 58. Using named storage volumes Volumes: pub_html: external: true … php: volumes: - pub_html:/var/ www/html Volume name Path location within the container > docker volume create pub_html —opt type=none —opt o=bind —opt device=/Volumes/E/site/ —label “com.envisage.desc=Site”
  • 59. Using named storage volumes > docker volume create pub_html —opt type=none —opt o=bind —opt device=/Volumes/E/site/ —label “com.envisage.desc=Site”
  • 60. ⚠ Common “Gotcha” * BEWARE WINDOWS PATHS * C:DockerDriveSite /C/DockerDrives/Site /host_mnt/c/DockerDrives/Site //c/DockerDrives/Site Windows LCOW Volume Path
  • 63. POPQUIZ! A. What is the command to initialize a swarm?
  • 64. POPQUIZ! A. What is the command to initialize a swarm? B. What is the command to deploy a docker stack?
  • 65. > docker stack deploy -c docker-compose.yml cascadia
  • 66. > docker stack deploy -c docker-compose.yml cascadia
  • 67. > docker stack deploy -c docker-compose.yml cascadia 🤔 ? ? ? ?
  • 68. > docker stack deploy -c docker-compose.yml cascadia 🤔 ? ? ? ? > docker service ls
  • 69. > docker stack deploy -c docker-compose.yml cascadia 🤔 ? ? ? ? > docker service ls
  • 70. > docker stack deploy -c docker-compose.yml cascadia 🤔 ? ? ? ? > docker service ls
  • 71. > docker stack deploy -c docker-compose.yml cascadia 🤔 ? ? ? ? > docker service ls
  • 72. > docker stack deploy -c docker-compose.yml cascadia 🤔 ? ? ? ? > docker service ls > docker stack ps cascadia
  • 73. > docker stack deploy -c docker-compose.yml cascadia 🤔 ? ? ? ? > docker service ls > docker stack ps cascadia
  • 74. > docker service logs cascadia_db
  • 75. > docker service logs cascadia_db
  • 76. > docker service logs cascadia_db
  • 77. > docker service logs cascadia_db
  • 80. Want to see it in action? > docker service logs cascadia_nginx -f
  • 81. Want to see it in action? > docker service logs cascadia_nginx -f
  • 82. Want to see it in action? > docker service logs cascadia_nginx -f
  • 83. Want to see it in action? > docker service logs cascadia_nginx -f
  • 84. Want to see it in action? > docker service logs cascadia_nginx -f
  • 86. ⚠ Common “Gotcha” localhost:3306 db:3306 upstream fastcgi { server 127.0.0.1:9000 } upstream fastcgi { server php:9000 }
  • 87. Ok, great! But … ¯_(ツ)_/¯ My production server has lots of configurations that have been customized… php/conf.d/* my.cnf nginx.conf nginx/conf.d/*
  • 88. version: “3.7” services: nginx: image: nginx networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “Nginx Service” volumes: - ./public_html:/var/ www/html configs: - source: mysite target: /etc/nginx/conf.d/mysite.conf ports: - “80:80” - “443:443” depends_on: - php - db labels: com.envisageinternational.desc: “Nginx Container” command: [‘sh’,'-c',"exec nginx -g 'daemon off;’”] db: image: mysql ports: - “3306:3306” networks: - web secrets: - db_pwd deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: [ node.role == manager ] environment: - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/db_pwd php: image: php:7.0-fpm networks: - web depends_on: - db deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-FPM Service” ports: - “9000:9000” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-FPM Container” php-cli: image: php:7.0-cli networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-CLI Service” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-CLI Container” command: [‘bin/sh’, ‘-c’, “sleep infinity”] networks: web: configs: mysite: file: ./mysite.conf secrets: db_pwd: file: ./root_db_password.txt PHP 7.0 FPM NGINX MySQL
  • 89. version: “3.7” services: nginx: image: nginx networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “Nginx Service” volumes: - ./public_html:/var/ www/html configs: - source: mysite target: /etc/nginx/conf.d/mysite.conf ports: - “80:80” - “443:443” depends_on: - php - db labels: com.envisageinternational.desc: “Nginx Container” command: [‘sh’,'-c',"exec nginx -g 'daemon off;’”] db: image: mysql ports: - “3306:3306” networks: - web secrets: - db_pwd deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: [ node.role == manager ] environment: - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/db_pwd networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.d volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.de command: [‘bin/sh’, ‘-c’, “sleep networks: web: configs: mysite: file: ./mysite.conf secrets: PHP 7.0 FPM NGINX MySQL
  • 91. Config: mysite > docker config inspect cascadia_mysite
  • 92. version: “3.4” services: nginx: image: nginx networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “Nginx Service” volumes: - ./public_html:/var/ www/html configs: - source: mysite target: /etc/nginx/conf.d/mysite.conf ports: - “80:80” - “443:443” depends_on: - php - db labels: com.envisageinternational.desc: “Nginx Container” command: [‘sh’,'-c',"exec nginx -g 'daemon off;’”] db: image: mysql ports: - “3306:3306” networks: - web secrets: - db_pwd deploy: replicas: 1 restart_policy: condition: on-failure placement: constraints: [ node.role == manager ] environment: - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/db_pwd php: image: php:7.0-fpm networks: - web depends_on: - db deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-FPM Service” ports: - “9000:9000” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-FPM Container” php-cli: image: php:7.0-cli networks: - web deploy: replicas: 1 restart_policy: condition: on-failure labels: com.envisageinternational.desc: “PHP-CLI Service” volumes: - ./public_html:/var/ www/html labels: com.envisageinternational.desc: “PHP-CLI Container” command: [‘bin/sh’, ‘-c’, “sleep infinity”] networks: web: configs: mysite: file: ./mysite.conf secrets: db_pwd: file: ./root_db_password.txt PHP 7.0 FPM NGINX MySQL
  • 94. Secret: db_pwd > docker secret inspect cascadia_db_pwd
  • 95. ⚠ Common “Gotcha” > docker config ls
  • 96. ⚠ Common “Gotcha” > docker config ls
  • 97. ⚠ Common “Gotcha” > docker config create mysite.2 ./mysite.conf > docker config ls
  • 98. ⚠ Common “Gotcha” > docker config create mysite.2 ./mysite.conf > docker config ls
  • 99. ⚠ Common “Gotcha” > docker config create mysite.2 ./mysite.conf > docker config ls
  • 100. ⚠ Common “Gotcha” > docker config create mysite.2 ./mysite.conf > docker config ls
  • 101. ⚠ Common “Gotcha” > docker config create mysite.2 ./mysite.conf > docker config ls > docker service update --config-rm cascadia_mysite --config-add source=mysite.2,target=/etc/nginx/conf.d/default.conf cascadia_nginx
  • 102. ⚠ Common “Gotcha” > docker config create mysite.2 ./mysite.conf > docker config ls > docker service update --config-rm cascadia_mysite --config-add source=mysite.2,target=/etc/nginx/conf.d/default.conf cascadia_nginx
  • 104. > docker service rollback cascadia_nginx
  • 105. > docker service rollback cascadia_nginx
  • 106. Done with the project for now? > docker stack rm cascadia
  • 107. Done with the project for now? > docker stack rm cascadia
  • 108. Done with the project for now? > docker stack rm cascadia
  • 109. Done with the project for now? > docker stack rm cascadia
  • 111. POPQUIZ! A. How do you check the replication status of services?
  • 112. POPQUIZ! A. How do you check the replication status of services? B. How do you check for error messages on the stack?
  • 113. POPQUIZ! A. How do you check the replication status of services? B. How do you check for error messages on the stack? BONUS POINT
  • 114. POPQUIZ! A. How do you check the replication status of services? B. How do you check for error messages on the stack? BONUS POINT How do you avoid truncating the error message?
  • 115. POPQUIZ! A. How do you check the replication status of services? B. How do you check for error messages on the stack? > docker stack ps vm --no-trunc BONUS POINT How do you avoid truncating the error message?
  • 116. Same project … multiple production targets? docker-compose.yml docker-compose-clientA.yml docker-compose-clientB.yml
  • 117. Same project … multiple production targets? docker-compose.yml docker-compose-clientA.yml docker-compose-clientB.yml
  • 118. Same project … multiple production targets? docker-compose.yml docker-compose-clientA.yml docker-compose-clientB.yml
  • 119. Same project … multiple production targets? docker-compose.yml docker-compose-clientA.yml docker-compose-clientB.yml
  • 121. POPQUIZ! A. How do you filter a list of docker objects (services, containers, images, etc)
  • 122. SIDEBAR:The $( ) magic with -q -l -f -q Quiet (ID only) -l Last Updated Only (1 result) -f Filter (you remember this)
  • 123. SIDEBAR:The $( ) magic with -q -l -f -q Quiet (ID only) -l Last Updated Only (1 result) -f Filter (you remember this) > docker container ls -q -l
  • 124. SIDEBAR:The $( ) magic with -q -l -f -q Quiet (ID only) -l Last Updated Only (1 result) -f Filter (you remember this) > docker container ls -q -l
  • 125. SIDEBAR:The $( ) magic with -q -l -f -q Quiet (ID only) -l Last Updated Only (1 result) -f Filter (you remember this) > docker container ls -q -l > docker container exec -it $(docker ps -lq -f name=cascadia_nginx) bash
  • 126. SIDEBAR:The $( ) magic with -q -l -f -q Quiet (ID only) -l Last Updated Only (1 result) -f Filter (you remember this) > docker container ls -q -l > docker container exec -it $(docker ps -lq -f name=cascadia_nginx) bash
  • 127. SIDEBAR:The $( ) magic with -q -l -f -q Quiet (ID only) -l Last Updated Only (1 result) -f Filter (you remember this) > docker container ls -q -l > docker container exec -it $(docker ps -lq -f name=cascadia_nginx) bash