CentOS 7.x CentOS 7.2 1511 Release

eva2000 · Dec 18, 2015

CentOS 7.2 1511 Release is out now ! Details below

Manuals/ReleaseNotes/CentOS7 - CentOS Wiki

CentOS 7.2 and Docker Errors Explained
Code:
cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core) 
Verified Media
Code:
sha256sum x86_64:
907e5755f824c5848b9c8efbb484f3cd945e93faa024bad6ba875226f9683b16  CentOS-7-x86_64-DVD-1511.iso
148449e661535f52aa846aa4a0112798f9153df8526b83e76075560a1de3accf  CentOS-7-x86_64-Everything-1511.iso
10dccb7c028d7afafbe1ade59dacf809edb3af2f24b1b69bafce9e6ec3c6ee17  CentOS-7-x86_64-LiveGNOME-1511.iso
ba9fed39d7e5398f4cd6b96497ba28da9979be12a4e0424d3030277d716c9e3f  CentOS-7-x86_64-LiveKDE-1511.iso
f90e4d28fa377669b2db16cbcb451fcb9a89d2460e3645993e30e137ac37d284  CentOS-7-x86_64-Minimal-1511.iso
9ed9ffb5d89ab8cca834afce354daa70a21dcb410f58287d6316259ff89758f5  CentOS-7-x86_64-NetInstall-1511.iso
Major Changes
This section is to be reviewed:

Since release 1503 (abrt>= 2.1.11-19.el7.centos.0.1) CentOS-7 can report bugs directly to bugs.centos.org. You can find information about that feature at this page

sudo is now capable of verifying command checksums

A Kerberos https proxy is now available for identity management

NSS no longer accepts DH key parameters < 768 nor RSA/DSA certificates with key sizes < 1024 bits, NSS also now enables TLS1.1/1.2 by default

various packages now support TLS1.1/1.2 and EC ciphers

The maximum number of SCSI LUNs has been increased

The virt-v2v command line tool is now fully supported

dd can now show transfer progress

OpenJDK7 now supports ECC for TLS connections

TPM version 2.0 driver level support has been added

tcpdump now supports nanosecond timestamps

Various updates to the networking stack (i.e. VXLANs, Data Center TCP, TCP/IP Stack, IPSec, ...)

Various atomic related packages have been updated

Update to the libATA, FCoE and DCB storage drivers

Updates to various storage, network and graphics drivers

Anaconda now supports NFS when adding additional repos during install

Major rebases for the following: Gnome from 3.8 to 3.14, KDE from 4.3 to 4.14, Xorg-X11-Server from 1.15 to 1.17, libreoffice from 4.2.8 to 4.3.7. openldap from 2.4.39 to 2.4.40 and more.

Because of these rebases some 3rd party repositories (Like EPEL, ELRepo, nux!, etc.) may not have all their packages rebuilt to use the newer packages in this release. This may cause the inability to update to the new release until those repositories fix their dependencies. You should contact the 3rd party repository owner to get problems fixed, or remove problem packages from 3rd party repositories to complete the update to this release.

Technology Preview: Support of the Btrfs file system, OverlayFS, DNSSEC, kpatch, virt-p2v tool and the Cisco VIC kernel driver

More information can be found at 7.2 Release Notes.
Click to expand...

Known Issues
A list of known upstream issues can be found here. Given that we build from the same sources, many if not all of those issues will likely also apply to CentOS Linux.

The initramfs files are now significantly bigger than in CentOS-7 (1503). You may want to consider lowering installonly_limit in /etc/yum.conf to reduce the number of installed kernels if your /boot partition is smaller than 4GB. New installations should consider using 1GB as the size of the /boot partition.

The updated libreoffice calc packages fix the bug which got introduced in CentOS-7 (1503) which affected sorting in spreadsheets. See this and this bug report.

The newer version of openssh in this release does not exit on the first match in the .ssh/config file as the older version did. This means if you have multiple host sections that match in your config for a given host, ALL will be applied. As an example, if you have a "host1.example.com" entry and a "*.example.com" entry, it will apply BOTH sets of instructions to "host1.example.com" but only the "*.example.com" section for "host2.example.com".

Many people have complained that Ethernet interfaces are not started with the new default NetworkManager tool/have to be explicitly enabled during installation. See CentOS-7 FAQ#2.

At least 1024 MB RAM is required to install and use CentOS-7 (1511). When using the Live ISOs for install, 1024 MB RAM produces very slow results and even some install failures. At least 1344 MB RAM is recommend for LiveGNOME or LiveKDE installs.

If your screen resolution is 800x600 or lower, parts of the images shown at the bottom during install are clipped.

VMware Workstation/VMware ESXi allow to install two different virtual SCSI adapters: BusLogic and LsiLogic. However the default kernel from CentOS-7 does not include the corresponding driver for any of them thus resulting in an unbootable system if you install on a SCSI disk using the defaults for CentOS Linux. If you select 'Red Hat Enterprise Linux' as OS, the paravirtualized SCSI adapter is used, which works.

Commonly used utilities such as ifconfig/netstat have been marked as deprecated for some considerable time and the 'net-tools' package is no longer part of the @core group so will not be installed by default. Use nmcli c up ifname <interfacename> to get your network up and running and use yum to install the package if you really need it. Kickstart users can pull in the net-tools package as part of the install.

The AlpsPS/2 'ALPS DualPoint TouchPad' edge scrolling does not work by default on CentOS-7. See bug 7403 for the command to make this feature work.

In VirtualBox up to version 5.0.10 the building of the vBox additions fails. For more information look here. This is expected to be fixed in the next maintenance release of 5.0.

Click to expand...

eva2000 · Dec 18, 2015

Known issues we might need to deal with if /boot partition is <4GB in size

The initramfs files are now significantly bigger than in CentOS-7 (1503). You may want to consider lowering installonly_limit in /etc/yum.conf to reduce the number of installed kernels if your /boot partition is smaller than 4GB. New installations should consider using 1GB as the size of the /boot partition.

Click to expand...

seems to default to 5
Code:
cat /etc/yum.conf | grep installonly_limit
installonly_limit=5

Josephm · Dec 18, 2015

I always put installonly_limit=2 to keep only 2 kernel version. is it ok?

eva2000 · Dec 18, 2015

i just use the default usually as most vps have /boot on same / partition

the concern would be for dedicated servers which have set a separate /boot partition

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