This topic describes the feature updates of Aliyun Linux 2 images in the order of their release time. Unless otherwise stated, the released updates apply to all Alibaba Cloud regions where Elastic Compute Service (ECS) is provided.

Image ID Release date Description
aliyun_2_1903_x64_20G_alibase_20200324.vhd March 24, 2020
  • Images are updated to the latest software versions to be compatible with CentOS 7.7. Common Vulnerabilities and Exposures (CVEs) are fixed.
  • The latest fixes for CVEs can be obtained through yum.
  • /etc/alinux-release is updated to Aliyun Linux release 2.1903 LTS (Hunting Beagle).
  • The tuned service is enabled by default.
  • Kernel changes:
    • The kernel is updated to the kernel-4.19.91-18.al7 version.
    • The NVMe driver is enabled.
    • THP support is enabled by default.
    • The io_uring interface is supported.
    • The Hygon CPU support is added.
    • The intel_idle driver is enabled.
    • guest halt polling is enabled.
    • ftrace syscalls is enabled.
    • Multiple Alibaba Cloud optimizations and bug fixes to the kernel including subsystems such as schedulers, memory, file systems, and block layers are open sourced.
    • Kernel security vulnerabilities are fixed.
aliyun_2_1903_x64_20G_alibase_20200221.vhd February 21, 2020
  • Images are updated to the latest software versions to be compatible with CentOS 7.7. CVEs are fixed.
  • IPv6 is enabled by default.
  • Kernel changes:
    • The kernel is updated to the kernel-4.19.81-17.1.al7 version.
    • Intel Cooper Lake CPU and Ice Lake CPU are supported.
    • The support for the AMD and ARM 64-bit CPU architectures is enhanced.
    • Persistent memory is supported.
    • The blk-iocost feature is provided. It is based on the cost model and the weight-based throttling function of blkio cgroup controllers. For more information, see Configure the weight-based throttling feature of blk-iocost.
    • The Pressure Stall Information (PSI) feature is supported for the cgroup v1 interface. For more information, see Enable the PSI feature for the cgroup v1 interface.
    • Multiple Alibaba Cloud optimizations and bug fixes to the kernel including subsystems such as schedulers, memory, file systems, and block layers are open sourced.
    • Kernel security vulnerabilities are fixed.
aliyun_2_1903_x64_20G_alibase_20200114.qboot.vhd January 14, 2020
  • Images are updated to the latest software version.
  • Kernel changes:
    • The kernel is updated to the 4.19.81-17.al7.x86_64 version.
    • Quick boot with qboot is supported.
  • Applicable regions: China (Beijing), China (Hangzhou), and China (Hong Kong).
aliyun_2_1903_64_20G_alibase_20190829.vhd August 29, 2019
  • Images are updated to the latest software version.
  • Kernel changes:
    • The kernel is updated to the kernel-4.19.57-15.1.al7.x86_64 version.
    • The Spectre-V1 SWAPGS vulnerability is fixed.
    • Issues with bio splitting code are fixed.
    • The default TCP congestion control algorithm is set to CUBIC.
    • The network is configured to 10-eth0.network.
aliyun_2_1903_64_20G_alibase_20190619.vhd June 19, 2019
  • Images are updated to the latest software version.
  • Kernel changes:
    • The kernel is updated to the kernel-4.19.43-13.2.al7.x86_64 version.
    • The cgroup writeback feature is supported for the cgroup v1 interface.
    • The policy-based routing is supported.
    • The ss command from the iproute2 suite is supported by enabling the INET_DIAG kernel configuration.
    • The configurable net.ipv4.tcp_tw_timeout kernel interface is supported.
    • The following network-related CVEs are fixed:
      • CVE-2019-11477.
      • CVE-2019-11478.
      • CVE-2019-11479.
aliyun-2.1903-x64-20G-alibase-20190507.vhd May 7, 2019
  • Images are updated to the latest software version.
  • The time synchronization delay that was present on instance startup is fixed.
  • The kernel is updated to kernel-4.19.34-11.al7.x86_64 version and other issues are fixed.
aliyun-2.1903-x64-20G-alibase-20190327.vhd March 27, 2019
  • Aliyun Linux 2 is released.
  • The kernel-4.19.24-9.al7.x86_64 kernel version is used in Aliyun Linux 2.