75 lines
2.6 KiB
YAML
75 lines
2.6 KiB
YAML
version: "3.8"
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services:
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web:
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image: nginx:alpine
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ports:
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- "80:80"
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deploy:
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# Service mode: use "replicated" for a set number of replicas,
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# or "global" to run one instance on every node.
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mode: replicated
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# Number of container replicas to run (only applicable in replicated mode)
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replicas: 3
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# Rolling update configuration (applies when updating the service)
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update_config:
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# Number of containers to update at the same time
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parallelism: 2
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# Delay between updating groups of containers (e.g., "10s" for 10 seconds)
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delay: 10s
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# Action to take if an update fails: rollback, pause, or continue
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failure_action: rollback
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# Time to monitor each updated container before proceeding to the next batch
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monitor: 10s
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# Maximum failure ratio (0.0 to 1.0) acceptable during the update
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max_failure_ratio: 0.3
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# Rollback configuration (applies if a deployment needs to be undone)
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rollback_config:
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parallelism: 1
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delay: 10s
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# Action to take if rollback fails
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failure_action: pause
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monitor: 10s
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max_failure_ratio: 0.2
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# Restart policy for containers in the service
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restart_policy:
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# Restart condition can be "none", "on-failure", or "any"
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condition: on-failure
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# Delay between restart attempts
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delay: 5s
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# Maximum number of restart attempts before considering the container as failed
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max_attempts: 3
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# Time window used to evaluate restart attempts (e.g., "120s")
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window: 120s
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# Resource constraints and reservations for containers
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resources:
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limits:
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# Maximum number of CPUs the container can use (as a fraction or whole number)
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cpus: "0.50"
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# Maximum memory (e.g., "50M" for 50 megabytes)
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memory: 50M
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reservations:
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# Guaranteed minimum CPUs for the container
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cpus: "0.25"
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# Guaranteed minimum memory
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memory: 20M
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# Placement constraints and preferences to control which nodes run the service
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placement:
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# Constraints ensure that only nodes meeting certain conditions are eligible.
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constraints:
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- node.role == manager
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- node.labels.region == us-east
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# Preferences allow you to influence (but not enforce) distribution.
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preferences:
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- spread: node.labels.az
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# Custom metadata labels for the service
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labels:
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com.example.description: "Sample web service using all deploy parameters"
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