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digitalocean.js
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digitalocean.js
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/**
* ClusterODM - A reverse proxy, load balancer and task tracker for NodeODM
* Copyright (C) 2018-present MasseranoLabs LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
const AbstractASRProvider = require('../classes/AbstractASRProvider');
const netutils = require('../netutils');
const S3 = require('../S3');
const axios = require('axios');
const logger = require('../logger');
const fs = require('fs');
module.exports = class DigitalOceanAsrProvider extends AbstractASRProvider{
constructor(userConfig){
super({
"accessToken": "CHANGEME!",
"s3":{
"accessKey": "CHANGEME!",
"secretKey": "CHANGEME!",
"endpoint": "CHANGEME!",
"bucket": "CHANGEME!",
"ignoreSSL": false
},
"maxRuntime": -1,
"maxUploadTime": -1,
"dropletsLimit": -1,
"createRetries": 1,
"region": "nyc3",
"monitoring": true,
"tags": ["clusterodm"],
"image": "ubuntu-16-04-x64",
"snapshot": false,
"sshKey":{
"fingerprint": "",
"path": "",
},
"imageSizeMapping": [
{"maxImages": 5, "slug": "s-1vcpu-1gb"},
{"maxImages": 50, "slug": "s-4vcpu-8gb"}
],
"minImages": -1,
"addSwap": 1,
"dockerImage": "opendronemap/nodeodm"
}, userConfig);
}
async initialize(){
this.validateConfigKeys(["accessToken", "s3.accessKey", "s3.secretKey", "s3.endpoint", "s3.bucket", "s3.ignoreSSL"]);
// Test S3
const { accessKey, secretKey, endpoint, bucket, ignoreSSL } = this.getConfig("s3");
await S3.testBucket(accessKey, secretKey, endpoint, bucket, ignoreSSL);
const im = this.getConfig("imageSizeMapping", []);
if (!Array.isArray(im)) throw new Error("Invalid config key imageSizeMapping (array expected)");
// Sort by ascending maxImages
im.sort((a, b) => {
if (a['maxImages'] < b['maxImages']) return -1;
else if (a['maxImages'] > b['maxImages']) return 1;
else return 0;
});
// Validate key path
const sshKeyPath = this.getConfig("sshKey.path", "");
if (sshKeyPath){
logger.info("Using existing SSH key");
const exists = await new Promise((resolve) => fs.exists(this.getConfig("sshKey.path"), resolve));
if (!exists) throw new Error("Invalid config key sshKey.path: file does not exist");
}
}
getDriverName(){
return "digitalocean";
}
getMachinesLimit(){
return this.getConfig("dropletsLimit", -1);
}
getCreateRetries(){
return this.getConfig("createRetries", 1);
}
getDownloadsBaseUrl(){
return `https://${this.getConfig("s3.bucket")}.${this.getConfig("s3.endpoint")}`;
}
canHandle(imagesCount){
const minImages = this.getConfig("minImages", -1);
return this.getImageSlugFor(imagesCount) !== null &&
(minImages === -1 || imagesCount >= minImages);
}
async setupMachine(req, token, dm, nodeToken){
// Add swap proportional to the available RAM
const swapToMemRatio = this.getConfig("addSwap");
if (swapToMemRatio){
const sshOutput = await dm.ssh(`bash -c "echo \\$(awk '/MemTotal/ { printf \\\"%d\\n\\\", \\$2 }' /proc/meminfo)"`)
const memory = parseFloat(sshOutput.trim());
if (!isNaN(memory)){
await dm.ssh(`bash -c "fallocate -l ${Math.ceil(memory * swapToMemRatio * 1024)} /swapfile && chmod 600 /swapfile && mkswap /swapfile && swapon /swapfile && free -h"`)
}else{
throw new Error(`Failed to allocate swap: ${sshOutput}`);
}
}
const dockerImage = this.getConfig("dockerImage");
const s3 = this.getConfig("s3");
const webhook = netutils.publicAddressPath("/commit", req, token);
await dm.ssh([`docker run -d -p 3000:3000 ${dockerImage} -q 1`,
`--s3_access_key ${s3.accessKey}`,
`--s3_secret_key ${s3.secretKey}`,
`--s3_endpoint ${s3.endpoint}`,
`--s3_bucket ${s3.bucket}`,
s3.ignoreSSL ? '--s3_ignore_ssl' : '',
`--webhook ${webhook}`,
`--token ${nodeToken}`].join(" "));
}
getImageSlugFor(imagesCount){
const im = this.getConfig("imageSizeMapping");
let slug = null;
for (var k in im){
const mapping = im[k];
if (mapping['maxImages'] >= imagesCount){
slug = mapping['slug'];
break;
}
}
return slug;
}
getMaxRuntime(){
return this.getConfig("maxRuntime");
}
getMaxUploadTime(){
return this.getConfig("maxUploadTime");
}
async getImageInfo(){
let imageName = this.getConfig("image");
let imageRegion = this.getConfig("region");
if (this.getConfig("snapshot")){
// We need to fetch the imageID
const response = await axios.get("https://api.digitalocean.com/v2/images?page=1&per_page=9999999&private=true", {
timeout: 10000,
headers: {
Authorization: `Bearer ${this.getConfig("accessToken")}`
}
});
if (response.status === 200){
const { images } = response.data;
const img = images.find(img => img.name === imageName);
if (img && img.id && img.regions){
// Check that the snapshot is available in our preferred region
if (img.regions.indexOf(imageRegion) === -1){
if (img.regions.length > 0){
const newRegion = img.regions[0];
logger.warn(`The snapshot ${imageName} is not available in the ${imageRegion}, switching to ${newRegion}`);
imageRegion = newRegion;
}else{
// Can this ever happen?
throw new Error(`Snapshot found, but not available in any region.`);
}
}
imageName = img.id;
}else{
throw new Error(`Snapshot ${imageName} not found.`);
}
}else{
throw new Error(`Cannot contact DigitalOcean API: ${response.status}`);
}
}
return {
image: imageName,
region: imageRegion
};
}
async getCreateArgs(imagesCount){
const imageInfo = await this.getImageInfo();
const args = [
"--digitalocean-access-token", this.getConfig("accessToken"),
"--digitalocean-region", imageInfo.region,
"--digitalocean-image", imageInfo.image,
"--digitalocean-size", this.getImageSlugFor(imagesCount)
];
if (this.getConfig("monitoring")){
args.push("--digitalocean-monitoring=true");
}
if (this.getConfig("tags", []).length > 0){
args.push("--digitalocean-tags");
args.push(this.getConfig("tags").join(","));
}
if (this.getConfig("sshKey.fingerprint", "")){
args.push("--digitalocean-ssh-key-fingerprint");
args.push(this.getConfig("sshKey.fingerprint"));
}
if (this.getConfig("sshKey.path", "")){
args.push("--digitalocean-ssh-key-path");
args.push(this.getConfig("sshKey.path"));
}
if (this.getConfig("engineInstallUrl")){
args.push("--engine-install-url")
args.push(this.getConfig("engineInstallUrl"));
}
return args;
}
};