allow loadbalancer to restart gracefully

[aojea]

• Use hostnames instead of IP addresses for the backends
• Use the wll known dns resolver for haproxy
• Allow haproxy to keep working despite the backends are not resolvable

Fixes #1562

[aojea]

/assign @BenTheElder

[BenTheElder]

podman? :+)

[aojea]

podman? :+)

I will get my hands in podman soon ;)

is HA something expected to work in podman now?

[BenTheElder]

Yes, AFAIK.

There's no reason this shouldn't be possible to do portably.

[BenTheElder]

in the future we might want to clarify this comment a bit, something like "don't exit when we can't yet resolve backends"

[BenTheElder]

/lgtm
/approve
podman cleanup in a follow-up is going to be messy :/
it's really obnoxious that we need to pass all this resolver info, why can't it respect resolv.conf? :/

[k8s-ci-robot]

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[aojea]

/lgtm
/approve
podman cleanup in a follow-up is going to be messy :/
it's really obnoxious that we need to pass all this resolver info, why can't it respect resolv.conf? :/

ahh, it can, I just added it to enforce using the dns resolver ...
Let me open an issue so I don't forget to come back to it