K8S Ecological Weekly | Kubernetes CronJob can directly configure time zone

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Prometheus blackbox_exporter v0.20.0 officially released

Blackbox_exporter in Prometheus We generally use it for black box monitoring, such as some HTTP/HTTPS, DNS, TCP and other interfaces or requests.

A lot of interesting features have been added in this version, let's take a look.

• #835Added health check for gRPC interface, and now gRPC is used more and more. You must know that when a similar function discussion was launched two years ago, the maintainers at that time thought that gRPC support had exceeded the scope of the project's responsibilities, but now it can be seen that blackbox_exporter has basically covered the various protocols we need.

If you use this function, it will generate some metrics for us to monitor and alert.

probe_grpc_healthcheck_response{serving_status="UNKNOWN"}=0
probe_grpc_healthcheck_response{serving_status="SERVING"}=1
probe_grpc_healthcheck_response{serving_status="NOT_SERVING"}=0
probe_grpc_healthcheck_response{serving_status="SERVICE_UNKNOWN"}=0
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• #823Added Hostnameparameters , which can be passed in the Hostrequest header when initiating a request. You can use the following configuration as a reference when configuring tasks:

scrape_configs:
  - job_name: blackbox_all
    metrics_path: /probe
    params:
      module: [ http_2xx ]  # Look for a HTTP 200 response.
    dns_sd_configs:
      - names:
          - example.com
          - prometheus.io
        type: A
        port: 443
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
        replacement: https://$1/  # Make probe URL be like https://1.2.3.4:443/
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 127.0.0.1:9115  # The blackbox exporter's real hostname:port.
      - source_labels: [__meta_dns_name]
        target_label: __param_hostname  # Make domain name become 'Host' header for probe requests
      - source_labels: [__meta_dns_name]
        target_label: vhost  # and store it in 'vhost' label
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For more details, please refer to itsReleaseNote

runc v1.1.1 released

runc is an underlying container runtime. There are many articles about runc in my previous articles, if you are interested, you can read them.

In fact, when runc runs as an underlying container, its release frequency is very low. After all, there are a large number of projects in the cloud native field that rely on runc or import runc as a dependency. Every time runc releases a new version, these projects generally Dependency updates are also required.

This release of v1.1.1 is just a minor version update, mainly for some bugfixes. Let's take a look at what's worth noting:

In previous versions statfs("/sys/fs/cgroup/unified"), ENOENTerrors other than occurred would cause panic. this time in#3433It has been adjusted in it, it will no longer panic, but will record the log.

Furthermore, through the#3398Fixed checks for content contained in /sys/kernel/cgroup/delegatefiles in . Because not all cgroups contain this content.

For more details, please refer to itsReleaseNote

Upstream progress

• # 109074 · Governors / GovernorsIn kubeadm, an --experimental-initial-corrupt-checkoption , which can be used to confirm the consistency of data in etcd members. This feature is expected to be officially available in v3.6 of etcd. In addition, the Release page of etcd is also written. Currently, etcd 3.5.x is not recommended for production environments. If you have not upgraded, you can continue to use 3.4.x. If it has been upgraded, you can increase this parameter by yourself;
• # 108032 · Governors / GovernorsThis PR adds timeZonea , which is implemented according to KEP 3140. From now on, when you use CronJob in Kubernetes, you can easily set the time zone.

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