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 instance families support Alibaba Cloud Linux 2 images. However, some instance families can use only specific public images:
    • Trusted images whose ID contains _secured_ are supported by only the ecs.g6t and ecs.c6t instance families.
    • AMD-compatible images whose ID contains _arm64_ are supported by only the ecs.ebmg6a, ecs.ebmc6a, and ecs.ebmr6a instance families.

2023

Image IDRelease dateDescription
aliyun_2_1903_x64_20G_alibase_20230327.vhd2023-03-27
  • 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.
  • The kernel version is updated to 4.19.91-27.1.al7.x86_64. You can run the uname -r command to view the kernel version.
aliyun_2_1903_x64_20G_alibase_20230308.vhd2023-03-08
  • 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.
  • The kernel version is updated to 4.19.91-27.1.al7.x86_64. You can run the uname -r command to view the kernel version.
aliyun_2_1903_x64_20G_qboot_alibase_20230214.vhd2023-02-14
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit (Quick Start) image is updated.
  • This image is derived from the aliyun_2_1903_x64_20G_alibase_20230103.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
aliyun_2_1903_x64_20G_uefi_alibase_20230214.vhd2023-02-14
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit (UEFI) image is updated.
  • This image is derived from the aliyun_2_1903_x64_20G_alibase_20230103.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
  • The boot mode is changed to the Unified Extensible Firmware Interface (UEFI) mode and only the UEFI mode is supported.
aliyun_2_1903_x64_20G_alibase_20230103.vhd2023-01-03
  • 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 4.19.91-27.al7.
    • Kernel bugs and critical security vulnerabilities are fixed.
    • synchronize_rcu_expedited is used in namespace_unlock to speed up the grace period of the read-copy update (RCU) mechanism, which increases the startup speed of 100 busybox containers by 19%.
    • The buffer size of the Trusted Platform Module driver is adjusted to prevent errors caused by insufficient memory during context switching.
    • The mq-deadline io scheduler is enabled by default.
    • The stability of the Non-Volatile Memory Express (NVMe), megaraid_sas, and mpt3sas drivers is improved.
    • Aero-series RAID controllers are fully supported.
    • The following features developed by Alibaba Cloud are supported:
      • The group identity feature can be dynamically enabled.
      • The zero page is used to fill the sparse file caused by a read page fault, which can reduce memory consumption during virtual machine boots.

2022

Image IDRelease dateDescription
aliyun_2_1903_x64_20G_alibase_20221118.vhd2022-11-18
  • 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.
  • The kernel version is updated to 4.19.91-26.6.al7.x86_64. You can run the uname -r command to check the kernel version.
aliyun_2_1903_x64_20G_alibase_20221102.vhd2022-11-02
  • 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.
  • The kernel version is updated to 4.19.91-26.6.al7.x86_64. You can run the uname -r command to check the kernel version.
aliyun_2_1903_x64_20G_alibase_20220815.vhd2022-08-15
  • 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.
  • The kernel version is updated to 4.19.91-26.1.al7.x86_64. You can run the uname -r command to check the kernel version.
aliyun_2_1903_x64_20G_alibase_20220727.vhd2022-07-27
  • 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.
  • The kernel version is updated to 4.19.91-26.al7.x86_64. You can run the uname -r command to check the kernel version.
aliyun_2_1903_x64_20G_alibase_20220701.vhd2022-07-01
  • 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.
  • The kernel version is updated to 4.19.91-26.al7.x86_64. You can run the uname -r command to check the kernel version.
aliyun_2_1903_x64_20G_alibase_20220525.vhd2022-05-25
  • 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 4.19.91-26.al7.
    • Kernel bugs and critical security vulnerabilities are fixed.
    • The following features developed by Alibaba Cloud are supported:
      • Group identity
      • Isolation enhancement for multi-tenant container networking
      • Reclaiming and monitoring of cold slab memory
      • Unified Kernel Fault Event Framework (UKFEF)
    • The Megaraid_sas driver is supported.
    • XDP and XDP sockets are supported by virtio-net.
    • The Registry Acceleration File System (RAFS) v6 format based on Enhanced Read-Only File System (EROFS) is supported.
    • Static keys are supported by hot fixes.
    • SMR zoned devices are supported.
    • The ext4 delalloc buffer write performance is optimized.
    • Kernel unit testing framework (KUnit) is supported.
    • More than 4 GB of memory can be reserved for a kdump crash kernel on ARM architecture.
    • Arm CoreLink CMN-700 Coherent Mesh Network (CMN) Performance Monitoring Unit (PMN) is supported.
    • Shared Data Cache To Cache (C2C)/HITM Analyzer is supported.
aliyun_2_1903_x64_20G_qboot_alibase_20220525.vhd2022-05-25
  • 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_20220525.vhd version of the Alibaba Cloud Linux 2.1903 LTS 64-bit base image.
aliyun_2_1903_x64_20G_uefi_alibase_20220525.vhd2022-05-25
  • 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_20220525.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_alibase_20220413.vhd2022-04-13
  • 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.vhd2022-04-08
  • The kernel version is updated to 4.19.91-25.7.al7.x86_64.
  • The image is updated to include the latest software packages.
aliyun_2_1903_x64_20G_alibase_20220225.vhd2022-02-25Kernel 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 Universal Time Coordinated (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.vhd2022-02-25
  • 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 the RTC. For more information, see Linux time and time zones.
aliyun_2_1903_x64_20G_uefi_alibase_20220225.vhd2022-02-25
  • 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 the RTC. For more information, see Linux time and time zones.

2021

Image IDRelease dateDescription
aliyun_2_1903_x64_20G_alibase_20211216.vhd2021-12-16Kernel 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 added.
  • For virtio-fs:
    • 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 in-house by Alibaba Cloud are supported:
    • Rich container
    • Hugetext (Transparent huge pages are enabled for code segments.)
aliyun_2_1903_x64_20G_qboot_alibase_20211216.vhd2021-12-16
  • 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_uefi_alibase_20211216.vhd2021-12-16
  • 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_alibase_20210726.vhd2021-07-26
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions and be compatible with the latest CentOS 7.9 version. 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.vhd2021-07-26
  • 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_uefi_alibase_20210726.vhd2021-07-26
  • 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.
aliyun_2_1903_x64_20G_alibase_20210630.vhd2021-06-30
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions and be compatible with the latest CentOS 7.9 version. 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 Page (THP) is 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.
aliyun_2_1903_x64_20G_alibase_20210325.vhd2021-03-25
  • 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 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.vhd2021-03-25
  • 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, Malaysia (Kuala Lumpur), and US (Virginia).
aliyun_2_1903_x64_20G_uefi_alibase_20210325.vhd2021-03-25
  • 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).
aliyun_2_1903_x64_20G_secured_alibase_20210325.vhd2021-03-25
  • 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_qboot_alibase_20210218.vhd2021-02-18
  • 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, Malaysia (Kuala Lumpur), and US (Virginia).
aliyun_2_1903_x64_20G_secured_alibase_20210218.vhd2021-02-18
  • 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_uefi_alibase_20210218.vhd2021-02-18
  • 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_alibase_20210120.vhd2021-01-20
  • 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.vhd2021-01-20
  • 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, Malaysia (Kuala Lumpur), and US (Virginia).
aliyun_2_1903_x64_20G_secured_alibase_20210120.vhd2021-01-20
  • 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_uefi_alibase_20210120.vhd2021-01-20
  • 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.

2020

Image IDRelease dateDescription
aliyun_2_1903_x64_20G_alibase_20200904.vhd2020-09-04
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions to be compatible with the latest CentOS 7.8 version. CVEs are fixed.
  • Aliyun Linux release 7.2 LTS (Hunting Beagle) in /etc/redhat-release is replaced by 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.vhd2020-09-04
  • 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_secured_alibase_20200904.vhd2020-09-04
  • 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_uefi_alibase_20200904.vhd2020-09-04
  • 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_secured_alibase_20200622.vhd2020-06-22
  • 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 I/O Virtualization Technology (IOMMU) is supported.
aliyun_2_1903_x64_20G_uefi_alibase_20200616.vhd2020-06-16
  • 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.
aliyun_2_1903_x64_20G_alibase_20200529.vhd2020-05-29
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions and be compatible with the latest CentOS 7.8 version. 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.vhd2020-03-24
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions and be compatible with the latest CentOS 7.8 version. 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.vhd2020-02-21
  • The Alibaba Cloud Linux 2.1903 LTS 64-bit base image is updated to include the latest software versions and be compatible with the latest CentOS 7.8 version. 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 that is 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.vhd2020-01-14
  • 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).

2019

Image IDRelease dateDescription
aliyun_2_1903_64_20G_alibase_20190829.vhd2019-08-29
  • 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 file.
aliyun_2_1903_64_20G_alibase_20190619.vhd2019-06-19
  • 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 that is 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.vhd2019-05-07
  • 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.vhd2019-03-27
  • 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.