org.zodiac.autoconfigure.kubernetes.istio.IstioBootstrapConfiguration Maven / Gradle / Ivy

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There is a newer version: 1.6.8
package org.zodiac.autoconfigure.kubernetes.istio;

import java.util.Arrays;

import javax.annotation.PostConstruct;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.Environment;

@SpringBootConfiguration
@ConditionalOnClass(value = {io.fabric8.kubernetes.client.Config.class, me.snowdrop.istio.client.IstioClient.class})
@ConditionalOnProperty(value = org.zodic.kubernetes.base.constants.KubernetesSystemPropertiesConstants.SPRING_ISTIO_ENABLED, havingValue = "true")
public class IstioBootstrapConfiguration {

    private static final Logger LOG = LoggerFactory.getLogger(IstioBootstrapConfiguration.class);

    private static final String ISTIO_PROFILE = "istio";

    @Bean
    @ConditionalOnMissingBean
    @ConfigurationProperties(prefix = org.zodic.kubernetes.base.constants.KubernetesSystemPropertiesConstants.SPRING_ISTIO_PREFIX, ignoreInvalidFields = true)
    protected IstioClientProperties istioClientProperties() {
        return new IstioClientProperties();
    }

    @Bean
    @ConditionalOnMissingBean
    protected org.zodic.kubernetes.istio.util.MeshUtils istioMeshUtils(IstioClientProperties istioClientProperties) {
        return new org.zodic.kubernetes.istio.util.MeshUtils(istioClientProperties);
    }

    @SpringBootConfiguration
    //@EnableConfigurationProperties(IstioClientProperties.class)
    protected static class IstioDetectionConfiguration {

        private final org.zodic.kubernetes.istio.util.MeshUtils utils;

        private final ConfigurableEnvironment environment;

        public IstioDetectionConfiguration(org.zodic.kubernetes.istio.util.MeshUtils utils, ConfigurableEnvironment environment) {
            this.utils = utils;
            this.environment = environment;
        }

        @PostConstruct
        public void detectIstio() {
            addIstioProfile(this.environment);
        }

        void addIstioProfile(ConfigurableEnvironment environment) {
            if (this.utils.isIstioEnabled()) {
                if (hasIstioProfile(environment)) {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("'{}' already in list of active profiles.", ISTIO_PROFILE);
                    }
                } else {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("Adding '{}' to list of active profiles.", ISTIO_PROFILE);
                    }
                    environment.addActiveProfile(ISTIO_PROFILE);
                }
            } else {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Not running inside kubernetes with istio enabled. Skipping '{}' profile activation.", ISTIO_PROFILE);
                }
            }
        }

        private boolean hasIstioProfile(Environment environment) {
            return Arrays.stream(environment.getActiveProfiles()).anyMatch(ISTIO_PROFILE::equalsIgnoreCase);
        }

    }

}