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Moby v1.12.4 Release Notes

Release Date: 2016-12-12 // over 7 years ago

  • IMPORTANT: Docker 1.12 ships with an updated systemd unit file for rpm 🐧 based installs (which includes RHEL, Fedora, CentOS, and Oracle Linux 7). When ⬆️ upgrading from an older version of docker, the upgrade process may not ⚡️ automatically install the updated version of the unit file, or fail to start 🐳 the docker service if;

    • 🐳 the systemd unit file (/usr/lib/systemd/system/docker.service) contains local changes, or
    • a systemd drop-in file is present, and contains -H fd:// in the ExecStart directive

    🐳 Starting the docker service will produce an error:

    Failed to start docker.service: Unit docker.socket failed to load: No such file or directory.

    or

    no sockets found via socket activation: make sure the service was started by systemd.

    To resolve this:

    • Backup the current version of the unit file, and replace the file with the version that ships with docker 1.12
    • ✂ Remove the Requires=docker.socket directive from the /usr/lib/systemd/system/docker.service file if present
    • ✂ Remove -H fd:// from the ExecStart directive (both in the main unit file, and in any drop-in files present).

    After making those changes, run sudo systemctl daemon-reload, and sudo 🐳 systemctl restart docker to reload changes and (re)start the docker daemon.

    ⚙ Runtime

    • 🛠 Fix issue where volume metadata was not removed #29083
    • 🔒 Asynchronously close streams to prevent holding container lock #29050
    • 🛠 Fix selinux labels for newly created container volumes #29050
    • ✂ Remove hostname validation #28990
    • 🛠 Fix deadlocks caused by IO races #29095 #29141
    • 🐳 Return an empty stats if the container is restarting #29150
    • 🛠 Fix volume store locking #29151
    • 🐳 Ensure consistent status code in API #29150
    • 🛠 Fix incorrect opaque directory permission in overlay2 #29093
    • 🐳 Detect plugin content and error out on docker pull #29297

    Swarm Mode

    Networking

    🌲 Logging

    • ⚡️ Update syslog log driver #29150

    Contrib

    • ⬆️ Run "dnf upgrade" before installing in fedora #29150
    • ➕ Add build-date back to RPM packages #29150
    • 🐳 deb package filename changed to include distro to distinguish between distro code names #27829