Centos 7 は ISO イメージをマウントし、ローカルのオフライン Yum ソースを構成します

1
mkdir -pv /mnt/{iso,cdrom}

1
mount -o loop /mnt/iso/CentOS-7-x86_64-DVD-2009.iso /mnt/cdrom
2
df -Th  # マウントが成功したかどうかを確認する

1
-rw-r--r--.  3 root root     14 Oct 30  2020 CentOS_BuildTag
2
drwxr-xr-x.  3 root root   2048 Oct 27  2020 EFI
3
-rw-rw-r--. 21 root root    227 Aug 30  2017 EULA
4
-rw-rw-r--. 21 root root  18009 Dec 10  2015 GPL
5
drwxr-xr-x.  3 root root   2048 Oct 27  2020 images
6
drwxr-xr-x.  2 root root   2048 Nov  3  2020 isolinux
7
drwxr-xr-x.  2 root root   2048 Oct 27  2020 LiveOS
8
drwxr-xr-x.  2 root root 673792 Nov  4  2020 Packages
9
drwxr-xr-x.  2 root root   4096 Nov  4  2020 repodata
10
-rw-rw-r--. 21 root root   1690 Dec 10  2015 RPM-GPG-KEY-CentOS-7
11
-rw-rw-r--. 21 root root   1690 Dec 10  2015 RPM-GPG-KEY-CentOS-Testing-7
12
-r--r--r--.  1 root root   2883 Nov  4  2020 TRANS.TBL

1
mkdir -pv /opt/repo_bak
2
mv /etc/yum.repos.d/*.repo /opt/repo_bak/
3
touch /etc/yum.repos.d/local.repo

1
[local]
2
name=local
3
baseurl=file:///mnt/cdrom    # /mnt/cdrom は ISO イメージをマウントするディレクトリです
4
gpgcheck=0
5
enabled=1
6
gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-CentOS-7

1
Loaded plugins: fastestmirror, langpacks
2
Determining fastest mirrors
3
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
4
14: curl#6 - "Could not resolve host: mirrorlist.centos.org"
5

6

7
 One of the configured repositories failed (Unknown),
8
 and yum doesn't have enough cached data to continue. At this point the only
9
 safe thing yum can do is fail. There are a few ways to work "fix" this:
10

11
     1. Contact the upstream for the repository and get them to fix the problem.
12

13
     2. Reconfigure the baseurl/etc. for the repository, to point to a working
14
        upstream. This is most often useful if you are using a newer
15
        distribution release than is supported by the repository (and the
16
        packages for the previous distribution release still work).
17

18
     3. Run the command with the repository temporarily disabled
19
            yum --disablerepo=<repoid> ...
20

21
     4. Disable the repository permanently, so yum won't use it by default. Yum
22
        will then just ignore the repository until you permanently enable it
23
        again or use --enablerepo for temporary usage:
24

25
            yum-config-manager --disable <repoid>
26
        or
27
            subscription-manager repos --disable=<repoid>
28

29
     5. Configure the failing repository to be skipped, if it is unavailable.
30
        Note that yum will try to contact the repo. when it runs most commands,
31
        so will have to try and fail each time (and thus. yum will be be much
32
        slower). If it is a very temporary problem though, this is often a nice
33
        compromise:
34

35
            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true
36

37
Cannot find a valid baseurl for repo: base/7/x86_64

1
[root@localhost ~]# yum clean all      # ローカルのyumキャッシュをすべてクリアする
2
Loaded plugins: fastestmirror, langpacks
3
Cleaning repos: local
4
Cleaning up everything
5
Maybe you want: rm -rf /var/cache/yum, to also free up space taken by orphaned data from disabled or removed repos
6
Cleaning up list of fastest mirrors
7
[root@localhost ~]# yum makecache      # ローカルのyumキャッシュを再生成する
8
Loaded plugins: fastestmirror, langpacks
9
Determining fastest mirrors
10
local                                                                                            | 3.6 kB  00:00:00
11
(1/4): local/group_gz                                                                            | 153 kB  00:00:00
12
(2/4): local/filelists_db                                                                        | 3.3 MB  00:00:00
13
(3/4): local/primary_db                                                                          | 3.3 MB  00:00:00
14
(4/4): local/other_db                                                                            | 1.3 MB  00:00:00
15
Metadata Cache Created
16
[root@localhost ~]# yum search openssl     # ローカルのyumソースを確認する
17
Loaded plugins: fastestmirror, langpacks
18
Loading mirror speeds from cached hostfile
19
================================================= N/S matched: openssl =================================================
20
apr-util-openssl.x86_64 : APR utility library OpenSSL crytpo support
21
openssl-devel.x86_64 : Files for development of applications which will use OpenSSL
22
perl-Crypt-OpenSSL-Bignum.x86_64 : Perl interface to OpenSSL for Bignum
23
perl-Crypt-OpenSSL-RSA.x86_64 : Perl interface to OpenSSL for RSA
24
perl-Crypt-OpenSSL-Random.x86_64 : Perl interface to OpenSSL for Random
25
pyOpenSSL.x86_64 : Python wrapper module around the OpenSSL library
26
xmlsec1-openssl.x86_64 : OpenSSL crypto plugin for XML Security Library
27
m2crypto.x86_64 : Support for using OpenSSL in python scripts
28
nss_compat_ossl.x86_64 : Source-level compatibility library for OpenSSL to NSS porting
29
openssl.x86_64 : Utilities from the general purpose cryptography library with TLS implementation
30
openssl-libs.x86_64 : A general purpose cryptography library with TLS implementation
31
openssl098e.x86_64 : A compatibility version of a general cryptography and TLS library
32
perl-Crypt-SSLeay.x86_64 : Crypt::SSLeay - OpenSSL glue that provides LWP https support
33
perl-Net-SSLeay.x86_64 : Perl extension for using OpenSSL
34
qca-ossl.x86_64 : OpenSSL plugin for the Qt Cryptographic Architecture v2
35

36
  Name and summary matches only, use "search all" for everything.
37
[root@localhost ~]#