This topic describes the release notes for Alibaba Cloud Linux 2 images and provides links to the relevant references. The release notes are ordered by release date, from the latest to the earliest.

Background information

  • Unless otherwise stated, the released updates apply to all Alibaba Cloud regions where Elastic Compute Service (ECS) is available.
  • Most Alibaba Cloud Linux 2 images are supported by almost all instance families. However, some Alibaba Cloud Linux 2 images are supported only by specific instance families. For more information, see the Release notes of images that are applicable to specific instance families section in this topic.

Release notes

Image ID Release date Description
aliyun_2_1903_x64_20G_alibase_20220413.vhd 2022-04-13
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions.
  • The image is compatible with the latest CentOS 7.9 version.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-25.8.al7.x86_64.
    • The CVE-2022-1016 and CVE-2022-27666 vulnerabilities are fixed.
aliyun_2_1903_x64_20G_alibase_20220408.vhd 2022-04-08
  • The kernel version is updated to 4.19.91-25.8.al7.x86_64.
  • The image is updated to include the latest software packages.
aliyun_2_1903_x64_20G_alibase_20220225.vhd 2022-02-25 Kernel updates:
  • The kernel version is updated to 4.19.91-25.6.al7.x86_64. You can run the uname -r command to check the kernel version.
  • The CVE-2022-0492, CVE-2021-4197, CVE-2022-0330, CVE-2022-22942, and CVE-2021-4155 vulnerabilities are fixed.
  • The UTC time standard is used by the real-time clock (RTC). For more information, see Linux time and time zones.
aliyun_2_1903_x64_20G_qboot_alibase_20220225.vhd 2022-02-25
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit (Quick Start) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20220225.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The UTC time standard is used by RTC. For more information, see Linux time and time zones.
aliyun_2_1903_x64_20G_alibase_20211216.vhd 2021-12-16 Kernel updates:
  • The kernel version is updated to 4.19.91-25.1.al7.x86_64. You can run the uname -r command to check the kernel version.
  • Kernel bugs and critical security vulnerabilities are fixed.
  • Kata-container is supported by the ARM64 architecture.
  • In IO_uring, the scheduling policies and priorities of sqthread can be modified.
  • The cpupower feature used for the AMD Milan platform is supported.
  • For virtio-fs:
    • The performance is optimized and improved.
    • The fuse DAX feature is supported.
    • The fuse CACHE_DIR/CACHE_SYMLINK feature is supported.
  • For crypto, the AVX and AVX2 instruction sets of the SM4 algorithm are optimized in the kernel.
  • The following features developed by Alibaba Cloud are supported:
    • Rich container
    • Hugetext (Transparent huge pages are enabled for code segments)
aliyun_2_1903_x64_20G_qboot_alibase_20211216.vhd 2021-12-16
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit (Quick Start) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20211216.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
aliyun_2_1903_x64_20G_alibase_20210726.vhd 2021-07-26
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with CentOS 7.9. Common vulnerabilities and exposures (CVEs) are fixed.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-24.1.al7.x86_64. You can run the uname -r command to check the kernel version.
    • Critical security vulnerabilities are fixed.
    • PCI Express (PCIe) drivers are updated.
aliyun_2_1903_x64_20G_qboot_alibase_20210726.vhd 2021-07-26
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit (Quick Start) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20210726.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
aliyun_2_1903_x64_20G_alibase_20210630.vhd 2021-06-30
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with CentOS 7.9. CVEs are fixed.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-24.al7.x86_64. You can run the uname -r command to check the kernel version.
    • Kernel bugs and critical security vulnerabilities are fixed.
    • The x86 FSGSBASE feature is supported.
    • The AMD Milan architecture is supported.
    • The RDMA NET Namespace feature is supported.
    • The ZSR feature is supported.
    • The group identity feature is supported in scenarios in which CPU resources are isolated.
    • The ARM64 MPAM feature is supported.
    • The Hisilicon, Phytium, and Zhaoxin architectures are supported.
    • The information about whether Transparent Huge Pages (THP) are enabled for processes is added to /proc/<pid>/status and /proc/<pid>/smap.
  • Supported regions: China (Hangzhou), China (Qingdao), China (Beijing), China (Chengdu), China (Hong Kong), and Singapore (Singapore).
aliyun_2_1903_x64_20G_alibase_20210325.vhd 2021-03-25
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with CentOS 7.9. CVEs are fixed.
  • The CVE-2021-3156 sudo vulnerability in Linux is fixed. For more information, see Vulnerability announcement | Linux sudo permission vulnerability (CVE-2021-3156).
  • The default service for network configuration is switched to network-scripts.
  • The net.ipv4.tcp_max_tw_buckets value is increased.
  • The Non-Volatile Memory Express (NVMe) driver is added to initramfs.
  • The kdump service is enabled by default.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-23.al7.x86_64. You can run the uname -r command to check the kernel version.
    • Kernel bugs and critical security vulnerabilities are fixed.
    • Intel Software Guard Extensions (SGX) is supported.
    • The network diagnostic tool Ping Trace is supported.
    • Cgroups are easier to create for scenarios in which multiple instances are deployed on a single server. This way, the amount of time required to create cgroups can be reduced.
    • Intel Ice Lake Machine Check Architecture (MCA) is supported.
aliyun_2_1903_x64_20G_qboot_alibase_20210325.vhd 2021-03-25
  • The Alibaba Cloud Linux 2.1903 64-bit (Quick Start) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20210325.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • Supported regions: China (Hangzhou), China (Beijing), China (Zhangjiakou), China (Shenzhen), China (Hong Kong), Singapore (Singapore), Malaysia (Kuala Lumpur), and US (Virginia).
aliyun_2_1903_x64_20G_qboot_alibase_20210218.vhd 2021-02-18
  • The Alibaba Cloud Linux 2.1903 64-bit (Quick Start) image is updated.
  • The default service for network configuration is switched to network-scripts.
  • The CVE-2021-3156 sudo vulnerability in Linux is fixed. For more information, see Vulnerability announcement | Linux sudo permission vulnerability (CVE-2021-3156).
  • Supported regions: China (Hangzhou), China (Shenzhen), China (Beijing), China (Zhangjiakou), China (Hong Kong), Singapore (Singapore), Malaysia (Kuala Lumpur), and US (Virginia).
aliyun_2_1903_x64_20G_alibase_20210120.vhd 2021-01-20
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with CentOS 7.9. CVEs are fixed.
  • The update-motd service is added and enabled by default.
  • The rhel-loadmodules service is enabled by default.
  • The vring_force_dma_api startup parameter is added.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-22.2.al7.x86_64. You can run the uname -r command to check the kernel version.
    • Kernel bugs and critical security vulnerabilities are fixed.
    • The kernel file system is updated to the latest ext4 file system from the Linux community to gain enhanced stability.
    • RAID is supported by default.
    • The Dragonfly Enclaves feature is supported.
    • The performance of Intel Ice Lake PMU Topdown can be debugged.
    • The read capability of io_uring buffer is optimized.
    • blk-throttle is optimized.
    • The Chinese cryptographic algorithm SM2 and the standard X509-formatted certificate that uses the SM2-with-SM3 Chinese cryptographic algorithm are supported.
    • blk-mq batch requests are supported.
    • The PCIe Error recover feature is supported.
    • Swap is optimized to improve the memory overselling stability.
    • The container enhancement technology is supported.
    • The CPU burst feature is supported. For more information, see Enable the CPU burst feature for cgroup v1.
aliyun_2_1903_x64_20G_qboot_alibase_20210120.vhd 2021-01-20
  • The Alibaba Cloud Linux 2.1903 64-bit (Quick Start) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20210120.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • Supported regions: China (Hangzhou), China (Shenzhen), China (Beijing), China (Zhangjiakou), China (Hong Kong), Singapore (Singapore), Malaysia (Kuala Lumpur), and US (Virginia).
aliyun_2_1903_x64_20G_alibase_20200904.vhd 2020-09-04
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with CentOS 7.8. CVEs are fixed.
  • Aliyun Linux release 7.2 LTS (Hunting Beagle) in /etc/redhat-release is replaced with Alibaba Cloud Linux (Aliyun Linux) release 2.1903 LTS (Hunting Beagle).
  • The image type information in /etc/image-id is optimized.
  • The tuned service is enabled by default.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-21.al7.x86_64. You can run the uname -r command to check the kernel version.
    • Kernel bugs and security vulnerabilities are fixed.
    • The io_uring bug is fixed and new features are added.
    • THP fork optimization is added to accelerate the creation of memory intensive processes.
    • Secure operations on Apache Pass (AEP) devices are supported.
    • The TCP-RT feature developed by Alibaba Cloud is supported.
    • The virtio-mem feature is supported.
    • The PCIe Gen4 feature, the Reliability, Availability, and Serviceability (RAS) feature, and the power management of Intel® Ice Lake processors are enhanced.
    • The Intel® Speed Select Technology is supported.
aliyun_2_1903_x64_20G_qboot_alibase_20200904.vhd 2020-09-04
  • The Alibaba Cloud Linux 2.1903 64-bit (Quick Start) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20200904.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • Supported regions: China (Hangzhou), China (Shenzhen), China (Zhangjiakou), and China (Hong Kong).
aliyun_2_1903_x64_20G_alibase_20200529.vhd 2020-05-29
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with CentOS 7.8. CVEs are fixed.
  • The /etc/image-id file that contains image information such as the image type is added.
  • The tuned service is disabled by default.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-19.1.al7.x86_64. You can run the uname -r command to check the kernel version.
    • The kernel interfaces supported by the Alibaba Cloud kernel for collecting scheduling and memory Quality of Service (QoS) metrics are open sourced. These interfaces can be used to perform fine-grained monitoring of Service Level Indicators (SLIs) related to scheduling and memory.
    • The kernel interfaces supported by the Alibaba Cloud kernel for controlling priorities of processes when a memcg is out of memory (OOM) are open sourced. These interfaces can be used to improve protection on important processes during system OOM.
    • AMD QoS is supported.
    • The virtio pmem driver is supported.
    • The free page reporting feature is supported to enhance the awareness of hypervisors about idle memory of a guest OS, and improve the management and utilization efficiency of physical memory resources.
    • Memory compaction is optimized to reduce memory fragmentation and improve system memory usage.
    • Kernel bugs and security vulnerabilities are fixed.
aliyun_2_1903_x64_20G_alibase_20200324.vhd 2020-03-24
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with CentOS 7.8. CVEs are fixed.
  • The latest fixes for CVEs can be obtained by using YUM.
  • The LTS version of Alibaba Cloud Linux 2 is released and /etc/alinux-release is updated to Aliyun Linux release 2.1903 LTS (Hunting Beagle).
  • The tuned service is enabled by default.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-18.al7.x86_64. You can run the uname -r command to check the kernel version.
    • NVMe devices are supported.
    • The THP feature is enabled by default to improve application performance.
    • io_uring is added.
    • Intel_idle and guest halt polling are enabled to improve the guest CPU performance.
    • ftrace syscalls is enabled to enhance the performance of the bpftrace tool.
    • 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 2020-02-21
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with CentOS 7.8. CVEs are fixed.
  • IPv6 is enabled by default.
  • Kernel updates:
    • The kernel version is updated to 4.19.81-17.1.al7.x86_64. You can run the uname -r command to check the kernel version.
    • Intel Cooper Lake processors and Ice Lake processors are supported.
    • The support for AMD and ARM 64-bit CPU architectures is enhanced.
    • Persistent memory is supported.
    • The blk-iocost feature is supported. This feature is based on the cost model and the weight-based throttling feature of blkio cgroup controllers. For more information, see Configure the weight-based throttling feature of blk-iocost.
    • The Pressure Stall Information (PSI) feature implemented based on cgroup v1 interfaces is supported. For more information, see Enable the PSI feature for cgroup v1.
    • 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 2020-01-14
  • The Alibaba Cloud Linux 2.1903 64-bit (Quick Start) image is released.
  • Kernel updates:
    • The kernel version is updated to 4.19.81-17.al7.x86_64. You can run the uname -r command to check the kernel version.
    • Quick boot (Qboot) is supported.
  • Supported regions: China (Beijing), China (Hangzhou), and China (Hong Kong).
aliyun_2_1903_64_20G_alibase_20190829.vhd 2019-08-29
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions.
  • Kernel updates:
    • The kernel version is updated to 4.19.57-15.1.al7.x86_64. You can run the uname -r command to check the kernel version.
    • The Spectre-V1 SWAPGS vulnerability is fixed.
    • Issues of DM bio splitting code are resolved.
    • The default TCP congestion control algorithm is set to CUBIC.
    • Network configurations are stored in the 10-eth0.network network file.
aliyun_2_1903_64_20G_alibase_20190619.vhd 2019-06-19
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions.
  • Kernel updates:
    • The kernel version is updated to 4.19.43-13.2.al7.x86_64. You can run the uname -r command to check the kernel version.
    • The cgroup writeback feature implemented based on cgroup v1 interfaces is supported.
    • Policy-based routing is supported.
    • The INET_DIAG kernel configuration item is enabled to support the ss command from the iproute2 suite.
    • 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 2019-05-07
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions.
  • The issue of time synchronization latency on instance startup is resolved.
  • The kernel version is updated to 4.19.34-11.al7.x86_64. You can run the uname -r command to check the kernel version. Several issues are resolved.
aliyun-2.1903-x64-20G-alibase-20190327.vhd 2019-03-27
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is released.
  • The 4.19.24-9.al7.x86_64 kernel version is used in the base image. You can run the uname -r command to check the kernel version.

Release notes of images that are applicable to specific instance families

UEFI images

Unified Extensible Firmware Interface (UEFI) images are applicable only to the ecs.c7, ecs.g7, ecs.r7, ecs.c7t, ecs.g7t, ecs.r7t, ecs.ebmc7a, ecs.ebmg7a, and ecs.ebmr7a instance families.
Image ID Release date Description
aliyun_2_1903_x64_20G_uefi_alibase_20220225.vhd 2022-02-25
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit (UEFI) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20220225.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • The UTC time standard is used by RTC. For more information, see Linux time and time zones.
aliyun_2_1903_x64_20G_uefi_alibase_20211216.vhd 2021-12-16
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit (UEFI) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20211216.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
aliyun_2_1903_x64_20G_uefi_alibase_20210726.vhd 2021-07-26
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit (UEFI) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20210726.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • Supported regions: China (Hangzhou), China (Shanghai), China (Beijing), China (Shenzhen), and Singapore (Singapore).
aliyun_2_1903_x64_20G_uefi_alibase_20210325.vhd 2021-03-25
  • The Alibaba Cloud Linux 2.1903 64-bit (UEFI) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20210325.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • Supported regions: China (Beijing), China (Hangzhou), China (Shanghai), and China (Shenzhen).

Trusted images

Trusted images are applicable only to the ecs.g6t and ecs.c6t instance families.
Image ID Release date Description
aliyun_2_1903_x64_20G_secured_alibase_20210325.vhd 2021-03-25
  • The Alibaba Cloud Linux 2.1903 64-bit (Trusted) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20210325.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • Kernel updates: The kernel version is updated to 4.19.91-23.al7.x86_64. You can run the uname -r command to check the kernel version.
aliyun_2_1903_x64_20G_secured_alibase_20210218.vhd 2021-02-18
  • The Alibaba Cloud Linux 2.1903 64-bit (Trusted) image is updated.
  • The default service for network configuration is switched to network-scripts.
  • The CVE-2021-3156 sudo vulnerability in Linux is fixed. For more information, see Vulnerability announcement | Linux sudo permission vulnerability (CVE-2021-3156).
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • Kernel updates: The kernel version is updated to 4.19.91-22.2.al7.x86_64. You can run the uname -r command to check the kernel version.
aliyun_2_1903_x64_20G_secured_alibase_20210120.vhd 2021-01-20
  • The Alibaba Cloud Linux 2.1903 64-bit (Trusted) image is updated.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20210120.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • Kernel updates: The kernel version is updated to 4.19.91-22.2.al7.x86_64. You can run the uname -r command to check the kernel version.
aliyun_2_1903_x64_20G_secured_alibase_20200904.vhd 2020-09-04
  • The Alibaba Cloud Linux 2.1903 64-bit (Trusted) image is updated to include the latest software versions.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20200904.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • Trusted features are added.
aliyun_2_1903_x64_20G_secured_alibase_20200622.vhd 2020-06-22
  • The Alibaba Cloud Linux 2.1903 64-bit (Trusted) image is released.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20200529.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • Trusted features are added.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-19.2.al7.x86_64. You can run the uname -r command to check the kernel version.
    • AMD IOMMU is supported.

AMD-compatible images

AMD-compatible images are applicable only to the ecs.ebmg6a, ecs.ebmc6a, and ecs.ebmr6a instance families.
Image ID Release date Description
aliyun_2_1903_x64_20G_uefi_alibase_20210218.vhd 2021-02-18
  • The Alibaba Cloud Linux 2.1903 64-bit (AMD-compatible) image is updated to include the latest software versions.
  • The default service for network configuration is switched to network-scripts.
  • The CVE-2021-3156 sudo vulnerability in Linux is fixed. For more information, see Vulnerability announcement | Linux sudo permission vulnerability (CVE-2021-3156).
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
aliyun_2_1903_x64_20G_uefi_alibase_20210120.vhd 2021-01-20
  • The Alibaba Cloud Linux 2.1903 64-bit (AMD-compatible) image is updated to include the latest software versions.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20210120.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
aliyun_2_1903_x64_20G_uefi_alibase_20200904.vhd 2020-09-04
  • The Alibaba Cloud Linux 2.1903 64-bit (AMD-compatible) image is updated to include the latest software versions.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20200904.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
aliyun_2_1903_x64_20G_uefi_alibase_20200616.vhd 2020-06-16
  • The Alibaba Cloud Linux 2.1903 64-bit (AMD-compatible) image is released.
  • This image is built based on the aliyun_2_1903_x64_20G_alibase_20200529.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the UEFI mode and only the UEFI mode is supported.
  • Kernel updates:
    • The kernel version is updated to 4.19.91-19.2.al7.x86_64. You can run the uname -r command to check the kernel version.
    • AMD IOMMU is supported.