Hi, On 3/7/20 6:01 PM, BDT wrote: > I have a problem to send alerts to slack via webhook. I have a traefik > proxy and alertmanager which run in docker swarm. > So the communication between prometheus and alert is done by docker > network service (alermanager:9093). > > Traefik generates certficates with acme let's encrypt and working well > but when alertmanager push an alert to slack, i get this error: "Post > <redacted>: x509: certificate signed by unknown authority" > I don't know if something has changed with let s encrypt certificate or > slack webhook or alertmanager version (v0.19) but it worked before.
Not sure if I understand your setup completely. Some ideas nevertheless: Could it be that you are affected by the recent Let's encrypt cert revocations? https://community.letsencrypt.org/t/revoking-certain-certificates-on-march-4/114864 If you have confirmed that this is not the case, it may help to get some more debugging insights: - Increase --log.level to debug - Capture the traffic using tcpdump and analyze it (wireshark is probably helpful) -- what is the actual certificate? does it look alright? Kind regards, Christian -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/9c47b74f-45d7-5463-9ef7-b291a9a66eab%40hoffmann-christian.info.
