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brigade.js
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brigade.js
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const { events, Job } = require('brigadier');
const kubernetes = require('@kubernetes/client-node');
const process = require('process');
const yaml = require('js-yaml');
const fetch = require('node-fetch');
const k8sClient = kubernetes.Config.defaultClient();
const BRIGADE_NAMESPACE = 'brigade';
const PROJECT_NAME = 'products';
const GITHUB_API_URL = 'https://api.github.com/repos/kooba/ditc-products';
const deploy = async (environmentName, gitSha) => {
console.log('deploying helm charts');
const service = new Job(
'ditc-products',
'jakubborys/ditc-brigade-worker:latest',
);
service.storage.enabled = false;
service.imageForcePull = true;
service.tasks = [
'cd /src',
`helm upgrade ${environmentName}-products \
charts/products --install \
--namespace=${environmentName} \
--set image.tag=${gitSha} \
--set replicaCount=1`,
];
await service.run();
};
const provisionEnvironment = async (environmentName) => {
await deploy(environmentName, process.env.BRIGADE_COMMIT_ID);
};
const getTagCommit = async (tag) => {
console.log(`getting commit sha for tag ${tag}`);
const tagUrl = `${GITHUB_API_URL}/git/refs/tags/${tag}`;
const response = await fetch(
tagUrl, {
method: 'GET',
headers: {
'Content-Type': 'application/json',
Authorization: `token ${process.env.BRIGADE_REPO_AUTH_TOKEN}`,
},
},
);
if (response.ok) {
const commit = await response.json();
return commit.object.sha;
}
throw Error(await response.text());
};
const deployToEnvironments = async (payload) => {
const tag = payload.ref;
const environmentConfigMaps = await k8sClient.listNamespacedConfigMap(
BRIGADE_NAMESPACE, true, undefined, undefined, undefined,
'type=preview-environment-config',
);
if (!environmentConfigMaps.body.items.length) {
throw Error('No environment configMaps found');
}
for (const configMap of environmentConfigMaps.body.items) {
const environmentsConfig = yaml.safeLoad(configMap.data.environment);
const config = environmentsConfig[PROJECT_NAME];
if (config && config.tag === tag) {
const { environmentName } = configMap.metadata.labels;
const gitSha = await getTagCommit(tag);
await deploy(environmentName, gitSha);
}
}
};
const logError = (error) => {
console.log('ERROR');
if (error.body) {
// Errors coming from k8s client will have all
// relevant info in the `body` field.
console.log(error.body);
} else {
console.log(error);
}
throw error;
};
events.on('exec', (e) => {
/**
* Events triggered by `brig run` command will trigger this handler.
*/
try {
const payload = JSON.parse(e.payload);
const { name } = payload;
if (!name) {
throw Error('Environment name must be specified');
}
provisionEnvironment(name).catch((error) => {
logError(error);
});
} catch (error) {
logError(error);
}
});
events.on('create', (e) => {
/**
* Events triggered by GitHub webhook on tag creation will trigger this handler.
*/
try {
const payload = JSON.parse(e.payload);
if (payload.ref_type !== 'tag') {
console.log('skipping, not a tag commit');
return;
}
deployToEnvironments(payload).catch((error) => {
logError(error);
});
} catch(error) {
logError(error);
}
});