148422597X Kubernetes Management Design Patterns [Vohra 2017-01-29] {E559F6BB}

Creating ConfigMaps from Directories
Chapter 11 ■ Using ConfigMaps
In this section we shall create a ConfigMap from files in a directory. First, create a directory /mysql/env and
set the directory’s permissions to global (777):
sudo mkdir /mysql/env
sudo chmod -R 777 /mysql/env
The /mysql/env directory is created as shown in Figure 11-2. CD (change directory) to the /mysql/env
directory.
Figure 11-2. Creating the /mysql/env directory
Create five files, each with a file name that would form the key for a configuration property in the
ConfigMap as listed in Table 11-2.
Table 11-2. ConfigMap Fields
File name
mysql.root.password
mysql.user
mysql.password
mysql.allow.empty.password
mysql.database
File content
mysql
mysql
mysql
no
mysql
Use the vi editor to create each of the files; for example:
sudo vi mysql.root.password
Specify the value that is to be used as the root password and save the file with :wq as shown in Figure 11-3.
Figure 11-3. File mysql.root.password
Similarly, the value stored in the mysql.allow.empty.password would be no as shown in Figure 11-4.
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