A Chart.js API server based on ChartjsNodeCanvas written in NodeJS.
A Docker image exists for running the server e.g. on Kubernetes. It exposes port 8080.
There is one endpoint /chart which expects a POST with a JSON body. The configuration parameter is the Chart.JS config passed to the chart class.
Example (POST /chart):
{
"width": 800,
"height": 800,
"configuration": {
"type": "line",
"data": {
"labels": [
"A",
"B",
"C"
],
"datasets": [
{
"label": "Line1",
"fill": false,
"backgroundColor": "rgba(141, 196, 81, .75)",
"borderColor": "rgba(141, 196, 81, 1)",
"pointBackgroundColor": "rgba(141, 196, 81, 1)",
"pointBorderColor": "#fff",
"pointHoverBackgroundColor": "#fff",
"pointHoverBorderColor": "rgba(141, 196, 81, 1)",
"data": [
20,
40,
60
]
},
{
"label": "Line2",
"fill": false,
"backgroundColor": "rgba(6, 101, 208, .75)",
"borderColor": "rgba(6, 101, 208, 1)",
"pointBackgroundColor": "rgba(6, 101, 208, 1)",
"pointBorderColor": "#fff",
"pointHoverBackgroundColor": "#fff",
"pointHoverBorderColor": "rgba(6, 101, 208, 1)",
"data": [
60,
40,
20
]
}
]
},
"options": {
"stacked": false,
"scales": {
"xAxes": [
{
"gridLines": {
"display": false
}
}
],
"yAxes": [
{
"gridLines": {
"display": false
},
"ticks": {
"beginAtZero": true,
"max": 100,
"min": 0
}
}
]
}
}
}
}When running on K8s the service has health check endpoints provided by Lightship.