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agents: re-pull the agent's own bao mTLS leaf on a timer

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swarm-controller re-issues an agent's store leaf at half its validity, but
the running container kept presenting the copy its hive delivered at
start, so a re-issued leaf reached the agent only on its next restart.

hive-agent-bao-identity now seeds a live copy of the pair in its own
runtime directory from the delivered credentials, and re-runs every 10
minutes: it logs in with the live leaf, reads its own
swarm/agents/<agent>/bao-mtls (a read render_agent already grants), and
when the leaf changed, logs in with the new pair and swaps it in only if
the store accepts it.

Every unit in the container that logs in to the store presents the live
pair: hive-agent (queue-identity.nix), hive-matrix-daemon,
hive-subagent-daemon, hive-agent-forge-token, hive-agent-forge-accounts
and hive-agent-github-token. They keep loading the server CA as a
credential. The long-running daemons are ordered after the refresher so
the live pair exists when they start.

It renews only while the held leaf is still valid: the login that reads
the new leaf is made with the current one.

Refs #5017
This commit is contained in:
atlas 2026-10-11 03:05:59 +02:00 • committed by mara
commit c6717bccb0
17 changed files with 308 additions and 166 deletions
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18
nix/agent-modules/github-token.nix
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@ -22,9 +22,7 @@ let
agentName = config.services.hyperhive.agent.user.name;
stateDir = "/agents/${agentName}/state";
# The same three ids ./bao.nix and ./forge-accounts.nix load.
certCredential = "hive-agent-bao-cert";
keyCredential = "hive-agent-bao-key";
# The server CA id ./bao.nix loads.
serverCaCredential = "hive-agent-bao-server-ca";
unitName = "hive-agent-github-token";
@ -76,23 +74,19 @@ in
RuntimeDirectoryMode = "0700";
# `0600`, the mode `github-token` has.
UMask = "0077";
LoadCredential = [
certCredential
keyCredential
serverCaCredential
];
LoadCredential = [ serverCaCredential ];
};
environment = {
BAO_ADDR = cfg.addr;
BAO_CLIENT_CERT = "%d/${certCredential}";
BAO_CLIENT_KEY = "%d/${keyCredential}";
BAO_CLIENT_CERT = cfg.clientCertFile;
BAO_CLIENT_KEY = cfg.clientKeyFile;
};
script = ''
set -euo pipefail
# No identity delivered: ./bao.nix's check reports that.
for id in ${lib.escapeShellArg certCredential} ${lib.escapeShellArg keyCredential}; do
if [ ! -s "$CREDENTIALS_DIRECTORY/$id" ]; then
for f in "$BAO_CLIENT_CERT" "$BAO_CLIENT_KEY"; do
if [ ! -s "$f" ]; then
echo "this agent has no store identity, so it cannot fetch its GitHub token." >&2
exit 0
fi