Monitors the VMware vCenter Server Appliance (VCSA) itself via its REST management API. State comes from the appliance's own reported values, with configurable thresholds throughout.

Includes the following checks:

• vMon service state: CRIT on any automatic service not running or reporting degraded health
• Appliance health areas: appliance-reported color per area
• CPU and memory: utilization, CPU steal, and swap page rate
• Filesystems: per-partition usage
• Certificates: machine TLS, signing, and trusted root, each with expiry thresholds and a hostname match check
• Root password: expiry thresholds
• Time synchronization: NTP reachability
• Update status: repository check staleness alongside install state
• Also covers network interfaces, DNS, access settings, proxy, syslog forwarding, pending shutdown, backup status, and database usage

Version history:

• 1.1.1: halves monitoring API requests, fixes a false alert on DNS collection failure and a duplicated line in the database usage summary
• 1.1.0: adds CPU steal, memory bytes, swap page rate, access/proxy/syslog/shutdown/database checks, and a certificate hostname match, corrects filesystem percentage source, revises root password and update-staleness defaults, credentials now resolved via the password store
• 1.0.0: initial release, vMon service states, appliance health areas, resource and filesystem usage, update status, backup status, certificates, root password expiry, time synchronization, network interfaces and DNS