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

Chapter 12 ■ Using Resource Quotas
Next, we shall demonstrate exceeding a ConfigMaps quota. Chapter 11 showed how to create
ConfigMaps, but I’ll briefly repeat the procedure here. We shall create some ConfigMaps from files in a
directory. The file names must be the same as the ConfigMap key, and the value is the content of the file.
Create a directory and set its permissions:
sudo mkdir /mysql/env
sudo chmod -R 777 /mysql/env
cd /mysql/env
Add the five files listed in Table 12-3 to the directory.
Table 12-3. Files from Which to Create ConfigMaps
File
mysql.root.password
mysql.database
mysql.user
mysql.password
mysql.allow.empty.password
Content
mysql
mysqldb
mysql
mysql
no
Create five ConfigMaps from the five files.
./kubectl create configmap mysql-config --from-file=/mysql/env/mysql.root.password
./kubectl create configmap mysql-config2 --from-file=/mysql/env/mysql.database
./kubectl create configmap mysql-config3 --from-file=/mysql/env/mysql.user
./kubectl create configmap mysql-config4 --from-file=/mysql/env/mysql.password
./kubectl create configmap mysql-config5 --from-file=/mysql/env/allow.empty.password
The five ConfigMaps are created as shown in Figure 12-19.
Figure 12-19. Creating ConfigMaps
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