{"id":86,"date":"2021-05-05T13:48:05","date_gmt":"2021-05-05T13:48:05","guid":{"rendered":"https:\/\/blog.sbaranidharan.online\/?p=86"},"modified":"2021-05-10T06:16:44","modified_gmt":"2021-05-10T06:16:44","slug":"docker-macos-expose-container-ports-to-host-machine","status":"publish","type":"post","link":"https:\/\/blog.sbaranidharan.online\/index.php\/2021\/05\/05\/docker-macos-expose-container-ports-to-host-machine\/","title":{"rendered":"Docker: MacOS expose container ports to host machine"},"content":{"rendered":"\n

As per the documentation from docker<\/a>, there are certain limitation in Mac OS environment where we cannot expose ports from docker container to host machine, as it is running on a virtual machine.<\/p>\n\n\n\n

If you do not want to communicate outside docker but if you want to connect to different images inside a same docker container or different docker container you can use network-mode to host.<\/p>\n\n\n\n

network_mode: "host"<\/pre><\/div>\n\n\n\n
But what if we need to expose outside docker to the host machine where the docker is running?<\/h2>\n\n\n\n
As a workaround we may need to create a loopback IP address in Mac OS host machine. To do this,<\/p>\n\n\n\n
  1. create a file in your current directory named loopback-alias.plist<\/span><\/em> and place below content. Here I’ve used 10.200.10.1<\/span><\/em> as a loopback IP address. But you can modify it if you want.<\/li><\/ol>\n\n\n\n
    <?xml version="1.0" encoding="UTF-8"?>\n<!DOCTYPE plist>\n<plist version="1.0">\n<dict>\n        <key>Label<\/key>\n        <string>loopback-alias<\/string>\n        <key>ProgramArguments<\/key>\n        <array>\n                <string>\/sbin\/ifconfig<\/string>\n                <string>lo0<\/string>\n                <string>alias<\/string>\n                <string>10.200.10.1<\/string>\n                <string>netmask<\/string>\n                <string>255.255.255.0<\/string>\n        <\/array>\n        <key>RunAtLoad<\/key>\n        <true\/>\n<\/dict>\n<\/plist><\/pre><\/div>\n\n\n\n
    2. And then run below commands in order to make it available when startup<\/p>\n\n\n\n
    sudo cp loopback-alias.plist \/Library\/LaunchDaemons\/loopback-alias.plist\nsudo launchctl load -w \/Library\/LaunchDaemons\/loopback-alias.plist<\/pre><\/div>\n\n\n\n
    3. In order to take this effect either you can restart your system or simply restart the network as follows<\/p>\n\n\n\n
    networksetup -setairportpower en0 off && networksetup -setairportpower en0 on<\/pre><\/div>\n\n\n\n
    Changes at docker-compose.yml<\/h2>\n\n\n\n
    redis:\n\timage: redis\n\texpose: \n\t\t- '6379'\n\tports: \n\t\t- '10.200.10.1:6379:6379'\n\textra_hosts: \n\t\t- 'localhost:10.200.10.1'<\/pre><\/div>\n\n\n\n
    This means, we are using hosts loopback IP where we are exposing the port. And you can access it from your host machine as follows,<\/p>\n\n\n\n
    http:\/\/10.200.10.1:6379<\/pre><\/div>\n\n\n\n
    Similarly we can add same configuration to any images to access it from host machine.<\/p>\n\n\n\n
    <\/p>\n\n\n\n
    You may need to add the following to your bashrc\/zshrc for MacOS<\/p>\n\n\n\n
    export DOCKER_HOST=unix:\/\/\/var\/run\/docker.sock<\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"
    As per the documentation from docker, there are certain limitation in Mac OS environment where we cannot expose ports from docker container to host machine, as it is running on a virtual machine. If you do not want to communicate outside docker but if you want to connect to different images inside a same docker […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[1],"tags":[23,24,16],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/posts\/86"}],"collection":[{"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/comments?post=86"}],"version-history":[{"count":4,"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/posts\/86\/revisions"}],"predecessor-version":[{"id":91,"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/posts\/86\/revisions\/91"}],"wp:attachment":[{"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/media?parent=86"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/categories?post=86"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.sbaranidharan.online\/index.php\/wp-json\/wp\/v2\/tags?post=86"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}