Tag Archives: ssh

Migrating to a new GIT server

Scenario:

You’re decommissioning an old server, which just so happens to have your GIT repo on it.

How can you migrate it without losing the history?

From the NEW SERVER:

Make your new directory & set the permissions to your GIT_USER:

mkdir /opt/git/qa.git
chown git.git /opt/git/qa.git

‘su’ to GIT_USER on the server, and initialize the newly created directory

su - git
cd /opt/git/qa.git
git init --bare

From the EXISTING CLIENT (with most recent copy of repo), make new directory, ‘cd’ into there and initialize it

mkdir ~/git/qa
cd ~/git/qa
git init .

Now, clone the existing repository INTO here.  It will not have the code, it’ll have the repository configuration.  Again, the command will be pointing at the ORIGINAL (soon to be decommissioned) server:

git clone --bare ssh://git@243.268.8.11/opt/git/qa.git

You’ll see something like:

Cloning into bare repository 'qa.git'...
git@243.268.8.11's password:
remote: Counting objects: 841, done.
remote: Compressing objects: 100% (595/595), done.
remote: Total 841 (delta 292), reused 605 (delta 208)
Receiving objects: 100% (841/841), 21.52 MiB | 23.68 MiB/s, done.
Resolving deltas: 100% (292/292), done.

Then, it will create another <repo>.git directory in your “new” local directory (~/git/qa).  ‘cd’ into that

cd ~/git/qa/qa.git

Now, it’s your job to PUSH that config to the NEW server:

git push --mirror ssh://git@991.11.78.221/opt/git/qa.git

You’ll see something like:

Counting objects: 841, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (511/511), done.
Writing objects: 100% (841/841), 21.52 MiB | 0 bytes/s, done.
Total 841 (delta 292), reused 841 (delta 292)
To ssh://991.11.78.221/opt/git/qa.git
 * [new branch]      master -> master

When that’s done, you can ‘cd’ back a level & delete the <repo>.git file that the clone created.

cd ..
rm -rf qa.git

Now, you can either re-clone from the NEW server, seen HERE, or modify the existing .git directory’s config file to point to the new location:

vi ~/git/original_qa_repo_directory/includes/.git/config

and change the OLD server’s IP …

[remote "origin"]
        url = ssh://git@243.268.8.11/opt/git/qa.git

… to the NEW server’s IP:

[remote "origin"]
        url = ssh://git@991.11.78.221/opt/git/qa.git

Now, issue a ‘git pull’ and you should be all set!

$ git pull
Already up-to-date.

 

HOWTO: MOSH – when you need to SSH and there’s intermittent connectivity problems

Read about is here: https://mosh.mit.edu/

I loaded it up on RHEL 7.2, and here’s the process that I went through …

Add pre-requisite packages:
yum -y install git protobuf-c autoconf automake wget bzip2 gcc-c++ zlib-devel libutempter ncurses-devel openssl-devel net-tools

Run all of these commands:

PREFIX=$HOME
wget http://protobuf.googlecode.com/files/protobuf-2.4.1.tar.bz2
tar -xf protobuf-2.4.1.tar.bz2
cd protobuf-2.4.1
./configure --prefix=$PREFIX
make
make install

export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/root/lib/pkgconfig

$ git clone https://github.com/mobile-shell/mosh
$ cd mosh
$ ./autogen.sh
$ ./configure
$ make
# make install

echo "export LD_LIBRARY_PATH=/root/lib" >> ~/.bashrc ; source ~/.bashrc

firewall-cmd –add-port=60000-61000/udp