Lab1: Create configmap<\/p>\n
Lab2: Map the config map to Pod<\/p>\n Lab 3: Secret (Create using command line)<\/p>\n Lab 4: Create Secret using yaml file<\/p>\n encode username and password using base64<\/p>\n Lab 5: Map secret as env in Pod<\/p>\n![\"\"](\"https:\/\/www.openwriteup.com\/wp-content\/uploads\/2023\/08\/cm.jpg\")
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apiVersion: v1<\/code>: This indicates that the ConfigMap is using the Kubernetes API version 1.<\/li>\nkind: ConfigMap<\/code>: This specifies the type of Kubernetes resource, which is a ConfigMap in this case.<\/li>\nmetadata<\/code>: This section contains metadata about the ConfigMap, such as its name and other optional information.\n\n
name: game-demo<\/code>: This is the name of the ConfigMap.<\/li>\n<\/ul>\n<\/li>\ndata<\/code>: This section contains the actual configuration data stored within the ConfigMap. The data is organized using key-value pairs.\n\n
player_initial_lives: \"3\"<\/code>: This sets a property-like key player_initial_lives<\/code> with the value “3”.<\/li>\nui_properties_file_name: \"user-interface.properties\"<\/code>: This sets a property-like key ui_properties_file_name<\/code> with the value “user-interface.properties”.<\/li>\ngame.properties: |<\/code>: This sets a file-like key game.properties<\/code> with a multi-line value. The content following the colon (|) is treated as a block of text.<\/li>\nuser-interface.properties: |<\/code>: This sets a file-like key user-interface.properties<\/code> with a multi-line value. The content following the colon (|) is treated as a block of text.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\nkubectl create -f cm.yaml\r\nkubectl get cm\r\nkubectl describe cm game-demo<\/pre>\n
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env<\/code>: Environment variables to be set within the container.\n\n
name: PLAYER_INITIAL_LIVES<\/code>: The name of the environment variable.The valueFrom<\/code> field specifies that the value of this environment variable will be sourced from the “game-demo” ConfigMap, specifically from the “player_initial_lives” key.<\/li>\nname: UI_PROPERTIES_FILE_NAME<\/code>: Another environment variable, sourced from the “ui_properties_file_name” key in the “game-demo” ConfigMap.<\/li>\n<\/ul>\n<\/li>\nvolumeMounts<\/code>: Describes how volumes are mounted into containers.\n\n
name: config<\/code>: Refers to the name of the volume defined at the Pod level.<\/li>\nmountPath: \"\/config\"<\/code>: The path inside the container where the volume should be mounted.<\/li>\nreadOnly: true<\/code>: The mounted volume is set to read-only.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\nvolumes<\/code>: Defines volumes to be used in the Pod.\n\n
name: config<\/code>: The name of the volume.The configMap<\/code> field specifies that this volume is sourced from a ConfigMap named “game-demo”.\n\n
items<\/code>: An array of keys from the ConfigMap to create as files within the volume.\n\n
key: \"game.properties\"<\/code>: The key within the ConfigMap whose value should be used to create a file.\n\n
path: \"game.properties\"<\/code>: The path where the file will be created within the volume.<\/li>\n<\/ul>\n<\/li>\nkey: \"user-interface.properties\"<\/code>: Similarly, this key’s value will be used to create a file.\n\n
path: \"user-interface.properties\"<\/code>: The path where the file will be created within the volume.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\nkubectl create -f cm-pod.yaml\r\nkubectl describe pod configmap-demo-pod\r\nkubectl exec configmap-demo-pod -c demo -it -- \/bin\/sh\r\nexport\r\nls \/config\/\r\nexit<\/pre>\n
echo -n 'root' > .\/username.txt\r\necho -n 'Mq2D#(8gf09' > .\/password.txt\r\nkubectl create secret generic db-cerds \\\r\n--from-file=.\/username.txt \\\r\n--from-file=.\/password.txt\r\nkubectl get secret\/db-cerds\r\nkubectl describe secret\/db-cerds<\/pre>\n
echo -n 'root' | base64\r\necho -n 'Mq2D#(8gf09' | base64<\/pre>\n
<\/a><\/p>\nkubectl create -f sec.yaml\r\nkubectl get secret\r\nkubectl describe secret database-creds<\/pre>\n